./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-015.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:26,858 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:26,919 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20cb5540-6594-40e1-95cb-e05e1e351049/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:26,923 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:26,924 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:26,945 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:26,946 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:26,946 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:26,946 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:26,947 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:26,947 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:26,947 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:26,947 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:26,947 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:26,947 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:26,948 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:26,948 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:26,948 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:26,948 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:26,948 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:26,948 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:26,948 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:26,949 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:26,949 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:26,949 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:26,949 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:26,950 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:27,242 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:27,252 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:27,255 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:27,258 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:27,258 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:27,259 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20cb5540-6594-40e1-95cb-e05e1e351049/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-015.smt2
[2025-04-28 21:21:27,261 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:27,267 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:27,484 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20cb5540-6594-40e1-95cb-e05e1e351049/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-015.smt2
[2025-04-28 21:21:27,487 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:27,488 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:27,489 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:27,489 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:27,489 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:27,494 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,536 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27 Unit
[2025-04-28 21:21:27,539 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:27,540 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:27,541 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:27,541 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:27,558 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,558 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,583 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,584 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,587 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,592 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,595 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,596 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,597 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,611 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:27,612 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:27,612 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:27,612 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:27,613 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (1/1) ...
[2025-04-28 21:21:27,616 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:27,627 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:27,640 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2025-04-28 21:21:27,645 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2025-04-28 21:21:27,657 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:27,657 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:27,657 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:27,658 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure main.ATentry.split given in one single declaration
[2025-04-28 21:21:27,658 INFO  L130     BoogieDeclarations]: Found specification of procedure main.ATentry.split
[2025-04-28 21:21:27,658 INFO  L138     BoogieDeclarations]: Found implementation of procedure main.ATentry.split
[2025-04-28 21:21:27,658 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure main.ATentry given in one single declaration
[2025-04-28 21:21:27,659 INFO  L130     BoogieDeclarations]: Found specification of procedure main.ATentry
[2025-04-28 21:21:27,659 INFO  L138     BoogieDeclarations]: Found implementation of procedure main.ATentry
[2025-04-28 21:21:27,659 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure fibo2 given in one single declaration
[2025-04-28 21:21:27,659 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo2
[2025-04-28 21:21:27,659 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo2
[2025-04-28 21:21:27,659 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure fibo2.AT.split given in one single declaration
[2025-04-28 21:21:27,659 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo2.AT.split
[2025-04-28 21:21:27,659 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo2.AT.split
[2025-04-28 21:21:27,661 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure fibo2.AT_tail given in one single declaration
[2025-04-28 21:21:27,661 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo2.AT_tail
[2025-04-28 21:21:27,661 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo2.AT_tail
[2025-04-28 21:21:27,661 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:27,661 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:27,662 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:27,718 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:27,720 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:27,916 INFO  L?                        ?]: Removed 39 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:27,917 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:27,931 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:27,931 INFO  L312             CfgBuilder]: Removed 3 assume(true) statements.
[2025-04-28 21:21:27,932 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:27 BoogieIcfgContainer
[2025-04-28 21:21:27,932 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:27,935 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:27,937 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:27,941 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:27,941 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:27" (1/3) ...
[2025-04-28 21:21:27,942 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500a2350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:27, skipping insertion in model container
[2025-04-28 21:21:27,942 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:27" (2/3) ...
[2025-04-28 21:21:27,943 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500a2350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:27, skipping insertion in model container
[2025-04-28 21:21:27,943 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:27" (3/3) ...
[2025-04-28 21:21:27,947 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:27,963 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:27,967 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 7 procedures, 30 locations, 48 edges, 7 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:28,020 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:28,035 INFO  L340      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@577919b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:28,035 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:28,039 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 30 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 13 states have internal predecessors, (15), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2025-04-28 21:21:28,047 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2025-04-28 21:21:28,047 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:28,048 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:28,049 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:28,055 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:28,055 INFO  L85        PathProgramCache]: Analyzing trace with hash 352560941, now seen corresponding path program 1 times
[2025-04-28 21:21:28,063 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:28,064 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716143188]
[2025-04-28 21:21:28,064 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:28,068 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:28,100 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:28,115 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:28,115 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:28,116 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:28,236 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:28,240 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:28,240 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716143188]
[2025-04-28 21:21:28,241 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716143188] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:28,244 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620160562]
[2025-04-28 21:21:28,244 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:28,244 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:28,247 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:28,254 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:28,257 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:28,335 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:28,362 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:28,363 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:28,363 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:28,365 INFO  L256         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:28,369 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:28,420 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:28,420 INFO  L308         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2025-04-28 21:21:28,421 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620160562] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:28,421 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2025-04-28 21:21:28,424 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6
[2025-04-28 21:21:28,427 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595007641]
[2025-04-28 21:21:28,427 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:28,432 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:28,432 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:28,464 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:28,465 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:28,467 INFO  L87              Difference]: Start difference. First operand  has 30 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 13 states have internal predecessors, (15), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand  has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:28,559 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:28,560 INFO  L93              Difference]: Finished difference Result 30 states and 41 transitions.
[2025-04-28 21:21:28,562 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:28,563 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 19
[2025-04-28 21:21:28,564 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:28,574 INFO  L225             Difference]: With dead ends: 30
[2025-04-28 21:21:28,574 INFO  L226             Difference]: Without dead ends: 30
[2025-04-28 21:21:28,576 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:28,582 INFO  L437           NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:28,583 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:28,621 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2025-04-28 21:21:28,683 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2025-04-28 21:21:28,685 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16)
[2025-04-28 21:21:28,689 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions.
[2025-04-28 21:21:28,690 INFO  L79                 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 19
[2025-04-28 21:21:28,692 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:28,692 INFO  L485      AbstractCegarLoop]: Abstraction has 30 states and 41 transitions.
[2025-04-28 21:21:28,694 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2025-04-28 21:21:28,694 INFO  L278                IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions.
[2025-04-28 21:21:28,695 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2025-04-28 21:21:28,696 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:28,696 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:28,703 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:28,900 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:28,900 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:28,901 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:28,901 INFO  L85        PathProgramCache]: Analyzing trace with hash -1638483560, now seen corresponding path program 1 times
[2025-04-28 21:21:28,901 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:28,902 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842430444]
[2025-04-28 21:21:28,902 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:28,902 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:28,908 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:28,913 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:28,913 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:28,913 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:28,965 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:28,965 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:28,965 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842430444]
[2025-04-28 21:21:28,965 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842430444] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:28,965 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158168632]
[2025-04-28 21:21:28,965 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:28,965 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:28,968 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:28,970 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:28,975 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:29,019 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:29,034 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:29,034 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:29,034 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:29,035 INFO  L256         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:29,037 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:29,050 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-04-28 21:21:29,050 INFO  L308         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2025-04-28 21:21:29,050 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [158168632] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:29,050 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2025-04-28 21:21:29,051 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4
[2025-04-28 21:21:29,051 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333771221]
[2025-04-28 21:21:29,051 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:29,052 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:29,052 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:29,052 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:29,053 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:29,053 INFO  L87              Difference]: Start difference. First operand 30 states and 41 transitions. Second operand  has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5)
[2025-04-28 21:21:29,110 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:29,111 INFO  L93              Difference]: Finished difference Result 30 states and 40 transitions.
[2025-04-28 21:21:29,112 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:29,112 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 19
[2025-04-28 21:21:29,112 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:29,113 INFO  L225             Difference]: With dead ends: 30
[2025-04-28 21:21:29,113 INFO  L226             Difference]: Without dead ends: 30
[2025-04-28 21:21:29,113 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:29,114 INFO  L437           NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:29,114 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 78 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:29,118 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2025-04-28 21:21:29,124 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2025-04-28 21:21:29,125 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15)
[2025-04-28 21:21:29,127 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions.
[2025-04-28 21:21:29,127 INFO  L79                 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 19
[2025-04-28 21:21:29,127 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:29,128 INFO  L485      AbstractCegarLoop]: Abstraction has 30 states and 40 transitions.
[2025-04-28 21:21:29,128 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5)
[2025-04-28 21:21:29,128 INFO  L278                IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions.
[2025-04-28 21:21:29,131 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2025-04-28 21:21:29,131 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:29,131 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:29,136 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:21:29,331 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:29,332 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:29,332 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:29,332 INFO  L85        PathProgramCache]: Analyzing trace with hash -1041684275, now seen corresponding path program 1 times
[2025-04-28 21:21:29,332 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:29,333 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580747222]
[2025-04-28 21:21:29,333 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:29,333 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:29,341 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:29,350 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:29,354 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:29,355 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:29,476 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2025-04-28 21:21:29,476 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:29,477 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580747222]
[2025-04-28 21:21:29,477 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580747222] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:29,477 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469593241]
[2025-04-28 21:21:29,477 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:29,481 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:29,484 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:29,491 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:29,494 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:29,534 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes.
[2025-04-28 21:21:29,562 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements.
[2025-04-28 21:21:29,562 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:29,562 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:29,563 INFO  L256         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:29,565 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:29,581 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-04-28 21:21:29,583 INFO  L308         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2025-04-28 21:21:29,583 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [469593241] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:29,583 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2025-04-28 21:21:29,583 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4
[2025-04-28 21:21:29,583 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818680207]
[2025-04-28 21:21:29,583 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:29,584 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:29,584 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:29,584 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:29,585 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:29,586 INFO  L87              Difference]: Start difference. First operand 30 states and 40 transitions. Second operand  has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5)
[2025-04-28 21:21:29,657 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:29,657 INFO  L93              Difference]: Finished difference Result 34 states and 51 transitions.
[2025-04-28 21:21:29,658 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:29,658 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 19
[2025-04-28 21:21:29,658 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:29,659 INFO  L225             Difference]: With dead ends: 34
[2025-04-28 21:21:29,659 INFO  L226             Difference]: Without dead ends: 34
[2025-04-28 21:21:29,660 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:29,660 INFO  L437           NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:29,661 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:29,662 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2025-04-28 21:21:29,667 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32.
[2025-04-28 21:21:29,667 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20)
[2025-04-28 21:21:29,668 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions.
[2025-04-28 21:21:29,669 INFO  L79                 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19
[2025-04-28 21:21:29,669 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:29,669 INFO  L485      AbstractCegarLoop]: Abstraction has 32 states and 46 transitions.
[2025-04-28 21:21:29,669 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5)
[2025-04-28 21:21:29,669 INFO  L278                IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions.
[2025-04-28 21:21:29,670 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2025-04-28 21:21:29,671 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:29,671 INFO  L218           NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:29,677 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2025-04-28 21:21:29,875 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:29,875 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:29,876 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:29,876 INFO  L85        PathProgramCache]: Analyzing trace with hash -145174824, now seen corresponding path program 1 times
[2025-04-28 21:21:29,876 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:29,876 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119739757]
[2025-04-28 21:21:29,876 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:29,876 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:29,894 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes.
[2025-04-28 21:21:29,907 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements.
[2025-04-28 21:21:29,907 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:29,907 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:30,005 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2025-04-28 21:21:30,005 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:30,005 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119739757]
[2025-04-28 21:21:30,005 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119739757] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:30,005 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468124132]
[2025-04-28 21:21:30,005 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:30,005 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:30,008 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:30,010 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:30,014 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2025-04-28 21:21:30,072 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes.
[2025-04-28 21:21:30,117 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements.
[2025-04-28 21:21:30,117 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:30,117 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:30,120 INFO  L256         TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:30,122 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:30,153 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked.
[2025-04-28 21:21:30,153 INFO  L308         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2025-04-28 21:21:30,153 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468124132] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:30,153 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2025-04-28 21:21:30,154 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6
[2025-04-28 21:21:30,154 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615789262]
[2025-04-28 21:21:30,154 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:30,154 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:30,154 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:30,155 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:30,155 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:30,155 INFO  L87              Difference]: Start difference. First operand 32 states and 46 transitions. Second operand  has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11)
[2025-04-28 21:21:30,198 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:30,198 INFO  L93              Difference]: Finished difference Result 34 states and 50 transitions.
[2025-04-28 21:21:30,199 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:30,199 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 42
[2025-04-28 21:21:30,199 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:30,200 INFO  L225             Difference]: With dead ends: 34
[2025-04-28 21:21:30,200 INFO  L226             Difference]: Without dead ends: 34
[2025-04-28 21:21:30,200 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:30,203 INFO  L437           NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:30,205 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 92 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:30,206 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2025-04-28 21:21:30,212 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30.
[2025-04-28 21:21:30,213 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15)
[2025-04-28 21:21:30,217 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions.
[2025-04-28 21:21:30,217 INFO  L79                 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 42
[2025-04-28 21:21:30,218 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:30,218 INFO  L485      AbstractCegarLoop]: Abstraction has 30 states and 40 transitions.
[2025-04-28 21:21:30,218 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11)
[2025-04-28 21:21:30,218 INFO  L278                IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions.
[2025-04-28 21:21:30,219 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2025-04-28 21:21:30,219 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:30,220 INFO  L218           NwaCegarLoop]: trace histogram [10, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:30,225 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:30,420 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:30,420 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:30,421 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:30,421 INFO  L85        PathProgramCache]: Analyzing trace with hash -554895065, now seen corresponding path program 1 times
[2025-04-28 21:21:30,421 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:30,421 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885160512]
[2025-04-28 21:21:30,421 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:30,421 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:30,452 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes.
[2025-04-28 21:21:30,472 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements.
[2025-04-28 21:21:30,476 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:30,476 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:30,642 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2025-04-28 21:21:30,643 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:30,643 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885160512]
[2025-04-28 21:21:30,643 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885160512] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:30,644 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732450540]
[2025-04-28 21:21:30,644 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:30,644 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:30,647 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:30,650 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:30,654 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2025-04-28 21:21:30,732 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes.
[2025-04-28 21:21:30,796 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements.
[2025-04-28 21:21:30,797 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:30,797 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:30,799 INFO  L256         TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:30,802 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:30,837 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked.
[2025-04-28 21:21:30,837 INFO  L308         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2025-04-28 21:21:30,837 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732450540] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:30,837 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2025-04-28 21:21:30,837 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6
[2025-04-28 21:21:30,837 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954155252]
[2025-04-28 21:21:30,838 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:30,838 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:30,838 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:30,838 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:30,839 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:30,839 INFO  L87              Difference]: Start difference. First operand 30 states and 40 transitions. Second operand  has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17)
[2025-04-28 21:21:30,889 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:30,889 INFO  L93              Difference]: Finished difference Result 32 states and 44 transitions.
[2025-04-28 21:21:30,891 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:30,892 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 65
[2025-04-28 21:21:30,892 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:30,893 INFO  L225             Difference]: With dead ends: 32
[2025-04-28 21:21:30,893 INFO  L226             Difference]: Without dead ends: 32
[2025-04-28 21:21:30,893 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:30,894 INFO  L437           NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:30,894 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:30,898 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2025-04-28 21:21:30,901 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2025-04-28 21:21:30,906 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 11 states have call predecessors, (18), 11 states have call successors, (18)
[2025-04-28 21:21:30,907 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions.
[2025-04-28 21:21:30,907 INFO  L79                 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 65
[2025-04-28 21:21:30,907 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:30,907 INFO  L485      AbstractCegarLoop]: Abstraction has 32 states and 44 transitions.
[2025-04-28 21:21:30,907 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17)
[2025-04-28 21:21:30,907 INFO  L278                IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions.
[2025-04-28 21:21:30,911 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2025-04-28 21:21:30,911 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:30,912 INFO  L218           NwaCegarLoop]: trace histogram [10, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:30,917 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2025-04-28 21:21:31,112 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:31,112 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:31,113 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:31,113 INFO  L85        PathProgramCache]: Analyzing trace with hash 955356605, now seen corresponding path program 2 times
[2025-04-28 21:21:31,113 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:31,113 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711657354]
[2025-04-28 21:21:31,113 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:31,114 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:31,131 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 65 statements into 2 equivalence classes.
[2025-04-28 21:21:31,141 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 65 of 65 statements.
[2025-04-28 21:21:31,142 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:31,142 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,252 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2025-04-28 21:21:31,252 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:31,252 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711657354]
[2025-04-28 21:21:31,252 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711657354] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:31,252 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929563235]
[2025-04-28 21:21:31,252 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:31,253 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:31,255 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:31,257 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:31,262 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2025-04-28 21:21:31,339 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 65 statements into 2 equivalence classes.
[2025-04-28 21:21:31,409 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 65 of 65 statements.
[2025-04-28 21:21:31,409 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:31,409 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,411 INFO  L256         TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:31,414 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:31,461 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2025-04-28 21:21:31,464 INFO  L308         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2025-04-28 21:21:31,464 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929563235] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:31,464 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2025-04-28 21:21:31,464 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6
[2025-04-28 21:21:31,464 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257178639]
[2025-04-28 21:21:31,465 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:31,465 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:31,465 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:31,466 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:31,466 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:31,466 INFO  L87              Difference]: Start difference. First operand 32 states and 44 transitions. Second operand  has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15)
[2025-04-28 21:21:31,507 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:31,507 INFO  L93              Difference]: Finished difference Result 32 states and 43 transitions.
[2025-04-28 21:21:31,508 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:31,508 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 65
[2025-04-28 21:21:31,508 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:31,509 INFO  L225             Difference]: With dead ends: 32
[2025-04-28 21:21:31,509 INFO  L226             Difference]: Without dead ends: 32
[2025-04-28 21:21:31,509 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:31,510 INFO  L437           NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:31,510 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:31,511 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2025-04-28 21:21:31,518 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2025-04-28 21:21:31,518 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17)
[2025-04-28 21:21:31,521 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions.
[2025-04-28 21:21:31,521 INFO  L79                 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 65
[2025-04-28 21:21:31,521 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:31,521 INFO  L485      AbstractCegarLoop]: Abstraction has 32 states and 43 transitions.
[2025-04-28 21:21:31,521 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15)
[2025-04-28 21:21:31,522 INFO  L278                IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions.
[2025-04-28 21:21:31,524 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2025-04-28 21:21:31,524 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:31,525 INFO  L218           NwaCegarLoop]: trace histogram [10, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:31,530 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:31,725 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:31,725 INFO  L403      AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:31,726 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:31,726 INFO  L85        PathProgramCache]: Analyzing trace with hash -491570093, now seen corresponding path program 3 times
[2025-04-28 21:21:31,726 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:31,726 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196024850]
[2025-04-28 21:21:31,726 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:31,726 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:31,741 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 65 statements into 8 equivalence classes.
[2025-04-28 21:21:31,772 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 32 of 65 statements.
[2025-04-28 21:21:31,772 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2025-04-28 21:21:31,772 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,999 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked.
[2025-04-28 21:21:31,999 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:31,999 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196024850]
[2025-04-28 21:21:31,999 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196024850] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:31,999 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325585259]
[2025-04-28 21:21:32,000 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:32,000 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:32,002 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:32,004 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:32,008 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2025-04-28 21:21:32,075 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 65 statements into 8 equivalence classes.
[2025-04-28 21:21:32,121 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 32 of 65 statements.
[2025-04-28 21:21:32,122 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2025-04-28 21:21:32,122 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:32,124 INFO  L256         TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 3 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:32,126 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:32,168 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2025-04-28 21:21:32,171 INFO  L308         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2025-04-28 21:21:32,171 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325585259] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:32,171 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2025-04-28 21:21:32,171 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8
[2025-04-28 21:21:32,171 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067249484]
[2025-04-28 21:21:32,171 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:32,172 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:32,172 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:32,172 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:32,172 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2025-04-28 21:21:32,173 INFO  L87              Difference]: Start difference. First operand 32 states and 43 transitions. Second operand  has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17)
[2025-04-28 21:21:32,205 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:32,205 INFO  L93              Difference]: Finished difference Result 32 states and 42 transitions.
[2025-04-28 21:21:32,207 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:32,207 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 65
[2025-04-28 21:21:32,207 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:32,208 INFO  L225             Difference]: With dead ends: 32
[2025-04-28 21:21:32,208 INFO  L226             Difference]: Without dead ends: 32
[2025-04-28 21:21:32,208 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2025-04-28 21:21:32,209 INFO  L437           NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:32,210 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:32,214 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2025-04-28 21:21:32,217 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2025-04-28 21:21:32,220 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 32 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16)
[2025-04-28 21:21:32,221 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions.
[2025-04-28 21:21:32,221 INFO  L79                 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 65
[2025-04-28 21:21:32,221 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:32,221 INFO  L485      AbstractCegarLoop]: Abstraction has 32 states and 42 transitions.
[2025-04-28 21:21:32,221 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17)
[2025-04-28 21:21:32,221 INFO  L278                IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions.
[2025-04-28 21:21:32,224 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2025-04-28 21:21:32,224 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:32,224 INFO  L218           NwaCegarLoop]: trace histogram [10, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:32,229 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2025-04-28 21:21:32,425 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2025-04-28 21:21:32,425 INFO  L403      AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:32,425 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:32,425 INFO  L85        PathProgramCache]: Analyzing trace with hash 961256937, now seen corresponding path program 4 times
[2025-04-28 21:21:32,425 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:32,426 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403361235]
[2025-04-28 21:21:32,426 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:32,426 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:32,439 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes.
[2025-04-28 21:21:32,445 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 64 of 65 statements.
[2025-04-28 21:21:32,445 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s)
[2025-04-28 21:21:32,445 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:32,548 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2025-04-28 21:21:32,548 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:32,548 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403361235]
[2025-04-28 21:21:32,548 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403361235] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:32,548 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548825224]
[2025-04-28 21:21:32,549 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:32,549 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:32,551 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:32,553 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:32,557 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2025-04-28 21:21:32,626 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes.
[2025-04-28 21:21:32,728 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 64 of 65 statements.
[2025-04-28 21:21:32,729 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s)
[2025-04-28 21:21:32,729 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:32,731 INFO  L256         TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:32,732 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:32,766 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked.
[2025-04-28 21:21:32,769 INFO  L308         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2025-04-28 21:21:32,769 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548825224] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:32,769 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2025-04-28 21:21:32,770 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6
[2025-04-28 21:21:32,770 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490901922]
[2025-04-28 21:21:32,770 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:32,770 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:32,770 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:32,771 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:32,771 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:32,771 INFO  L87              Difference]: Start difference. First operand 32 states and 42 transitions. Second operand  has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 1 states have call predecessors, (13), 3 states have call successors, (13)
[2025-04-28 21:21:32,796 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:32,798 INFO  L93              Difference]: Finished difference Result 32 states and 41 transitions.
[2025-04-28 21:21:32,798 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:32,799 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 1 states have call predecessors, (13), 3 states have call successors, (13) Word has length 65
[2025-04-28 21:21:32,799 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:32,799 INFO  L225             Difference]: With dead ends: 32
[2025-04-28 21:21:32,799 INFO  L226             Difference]: Without dead ends: 30
[2025-04-28 21:21:32,800 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:32,802 INFO  L437           NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:32,802 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 88 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:32,803 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2025-04-28 21:21:32,805 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2025-04-28 21:21:32,807 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15)
[2025-04-28 21:21:32,808 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions.
[2025-04-28 21:21:32,808 INFO  L79                 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 65
[2025-04-28 21:21:32,808 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:32,808 INFO  L485      AbstractCegarLoop]: Abstraction has 30 states and 38 transitions.
[2025-04-28 21:21:32,808 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 1 states have call predecessors, (13), 3 states have call successors, (13)
[2025-04-28 21:21:32,808 INFO  L278                IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions.
[2025-04-28 21:21:32,809 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2025-04-28 21:21:32,812 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:32,812 INFO  L218           NwaCegarLoop]: trace histogram [10, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:32,817 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2025-04-28 21:21:33,016 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:33,016 INFO  L403      AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:33,016 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:33,017 INFO  L85        PathProgramCache]: Analyzing trace with hash 628327059, now seen corresponding path program 1 times
[2025-04-28 21:21:33,017 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:33,017 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544093072]
[2025-04-28 21:21:33,017 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:33,017 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:33,029 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes.
[2025-04-28 21:21:33,045 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements.
[2025-04-28 21:21:33,045 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:33,045 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:33,633 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 41 proven. 12 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked.
[2025-04-28 21:21:33,633 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:33,634 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544093072]
[2025-04-28 21:21:33,634 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544093072] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:33,634 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271322478]
[2025-04-28 21:21:33,634 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:33,634 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:33,637 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:33,639 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:33,643 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2025-04-28 21:21:33,706 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes.
[2025-04-28 21:21:33,761 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements.
[2025-04-28 21:21:33,761 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:33,762 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:33,764 INFO  L256         TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 19 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:33,767 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:34,312 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 41 proven. 12 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked.
[2025-04-28 21:21:34,313 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:38,289 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 41 proven. 12 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked.
[2025-04-28 21:21:38,289 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [271322478] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:38,289 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:38,290 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9
[2025-04-28 21:21:38,290 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993149686]
[2025-04-28 21:21:38,290 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:38,290 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2025-04-28 21:21:38,291 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:38,292 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2025-04-28 21:21:38,294 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2025-04-28 21:21:38,294 INFO  L87              Difference]: Start difference. First operand 30 states and 38 transitions. Second operand  has 9 states, 5 states have (on average 3.4) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (19), 1 states have call predecessors, (19), 5 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20)
[2025-04-28 21:21:38,407 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:38,407 INFO  L93              Difference]: Finished difference Result 36 states and 54 transitions.
[2025-04-28 21:21:38,408 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:38,408 INFO  L79                 Accepts]: Start accepts. Automaton has  has 9 states, 5 states have (on average 3.4) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (19), 1 states have call predecessors, (19), 5 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 65
[2025-04-28 21:21:38,409 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:38,409 INFO  L225             Difference]: With dead ends: 36
[2025-04-28 21:21:38,409 INFO  L226             Difference]: Without dead ends: 36
[2025-04-28 21:21:38,409 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2025-04-28 21:21:38,410 INFO  L437           NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:38,410 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:38,411 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2025-04-28 21:21:38,415 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36.
[2025-04-28 21:21:38,415 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 36 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (27), 15 states have call predecessors, (27), 13 states have call successors, (27)
[2025-04-28 21:21:38,416 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions.
[2025-04-28 21:21:38,416 INFO  L79                 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 65
[2025-04-28 21:21:38,416 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:38,416 INFO  L485      AbstractCegarLoop]: Abstraction has 36 states and 54 transitions.
[2025-04-28 21:21:38,417 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 5 states have (on average 3.4) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (19), 1 states have call predecessors, (19), 5 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20)
[2025-04-28 21:21:38,417 INFO  L278                IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions.
[2025-04-28 21:21:38,418 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 112
[2025-04-28 21:21:38,418 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:38,419 INFO  L218           NwaCegarLoop]: trace histogram [18, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:38,424 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:38,623 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2025-04-28 21:21:38,623 INFO  L403      AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:38,623 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:38,624 INFO  L85        PathProgramCache]: Analyzing trace with hash 935602939, now seen corresponding path program 2 times
[2025-04-28 21:21:38,624 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:38,624 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785395535]
[2025-04-28 21:21:38,624 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:38,624 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:38,645 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 111 statements into 2 equivalence classes.
[2025-04-28 21:21:38,665 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 111 of 111 statements.
[2025-04-28 21:21:38,665 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:38,665 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:39,415 INFO  L134       CoverageAnalysis]: Checked inductivity of 525 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked.
[2025-04-28 21:21:39,416 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:39,416 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785395535]
[2025-04-28 21:21:39,416 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785395535] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:39,416 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833943790]
[2025-04-28 21:21:39,416 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:39,416 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:39,419 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:39,421 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:39,425 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2025-04-28 21:21:39,522 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 111 statements into 2 equivalence classes.
[2025-04-28 21:21:39,616 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 111 of 111 statements.
[2025-04-28 21:21:39,616 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:39,616 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:39,620 INFO  L256         TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 25 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:39,623 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:40,098 INFO  L134       CoverageAnalysis]: Checked inductivity of 525 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked.
[2025-04-28 21:21:40,098 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:43,417 INFO  L134       CoverageAnalysis]: Checked inductivity of 525 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked.
[2025-04-28 21:21:43,417 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833943790] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:43,417 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:43,417 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10
[2025-04-28 21:21:43,417 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039564920]
[2025-04-28 21:21:43,417 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:43,418 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2025-04-28 21:21:43,418 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:43,418 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2025-04-28 21:21:43,418 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2025-04-28 21:21:43,419 INFO  L87              Difference]: Start difference. First operand 36 states and 54 transitions. Second operand  has 10 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (20), 1 states have call predecessors, (20), 6 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21)
[2025-04-28 21:21:43,617 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:43,617 INFO  L93              Difference]: Finished difference Result 49 states and 100 transitions.
[2025-04-28 21:21:43,617 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2025-04-28 21:21:43,617 INFO  L79                 Accepts]: Start accepts. Automaton has  has 10 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (20), 1 states have call predecessors, (20), 6 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 111
[2025-04-28 21:21:43,618 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:43,619 INFO  L225             Difference]: With dead ends: 49
[2025-04-28 21:21:43,619 INFO  L226             Difference]: Without dead ends: 49
[2025-04-28 21:21:43,619 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 219 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:21:43,620 INFO  L437           NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:43,620 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 174 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:21:43,620 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2025-04-28 21:21:43,629 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38.
[2025-04-28 21:21:43,629 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 38 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 15 states have call successors, (15), 6 states have call predecessors, (15), 9 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31)
[2025-04-28 21:21:43,630 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 60 transitions.
[2025-04-28 21:21:43,630 INFO  L79                 Accepts]: Start accepts. Automaton has 38 states and 60 transitions. Word has length 111
[2025-04-28 21:21:43,631 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:43,631 INFO  L485      AbstractCegarLoop]: Abstraction has 38 states and 60 transitions.
[2025-04-28 21:21:43,631 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (20), 1 states have call predecessors, (20), 6 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21)
[2025-04-28 21:21:43,631 INFO  L278                IsEmpty]: Start isEmpty. Operand 38 states and 60 transitions.
[2025-04-28 21:21:43,632 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 158
[2025-04-28 21:21:43,632 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:43,632 INFO  L218           NwaCegarLoop]: trace histogram [26, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:43,637 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2025-04-28 21:21:43,835 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:43,835 INFO  L403      AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:43,835 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:43,835 INFO  L85        PathProgramCache]: Analyzing trace with hash 1560504789, now seen corresponding path program 3 times
[2025-04-28 21:21:43,836 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:43,836 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608696980]
[2025-04-28 21:21:43,836 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:43,836 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:43,854 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 157 statements into 13 equivalence classes.
[2025-04-28 21:21:43,935 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 81 of 157 statements.
[2025-04-28 21:21:43,935 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2025-04-28 21:21:43,935 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:44,570 INFO  L134       CoverageAnalysis]: Checked inductivity of 1140 backedges. 6 proven. 127 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked.
[2025-04-28 21:21:44,570 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:44,570 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608696980]
[2025-04-28 21:21:44,570 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608696980] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:44,570 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66050077]
[2025-04-28 21:21:44,570 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:44,570 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:44,573 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:44,575 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:44,578 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2025-04-28 21:21:44,723 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 157 statements into 13 equivalence classes.
[2025-04-28 21:21:44,805 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 81 of 157 statements.
[2025-04-28 21:21:44,805 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2025-04-28 21:21:44,805 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:44,808 INFO  L256         TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:44,815 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:45,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 1140 backedges. 376 proven. 8 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked.
[2025-04-28 21:21:45,653 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:53,015 INFO  L134       CoverageAnalysis]: Checked inductivity of 1140 backedges. 6 proven. 127 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked.
[2025-04-28 21:21:53,015 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [66050077] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:53,015 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:53,015 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12
[2025-04-28 21:21:53,015 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88626507]
[2025-04-28 21:21:53,016 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:53,016 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2025-04-28 21:21:53,016 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:53,017 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2025-04-28 21:21:53,017 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:53,017 INFO  L87              Difference]: Start difference. First operand 38 states and 60 transitions. Second operand  has 12 states, 7 states have (on average 4.0) internal successors, (28), 12 states have internal predecessors, (28), 9 states have call successors, (31), 2 states have call predecessors, (31), 7 states have return successors, (34), 6 states have call predecessors, (34), 9 states have call successors, (34)
[2025-04-28 21:21:53,163 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:53,163 INFO  L93              Difference]: Finished difference Result 44 states and 80 transitions.
[2025-04-28 21:21:53,164 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:53,164 INFO  L79                 Accepts]: Start accepts. Automaton has  has 12 states, 7 states have (on average 4.0) internal successors, (28), 12 states have internal predecessors, (28), 9 states have call successors, (31), 2 states have call predecessors, (31), 7 states have return successors, (34), 6 states have call predecessors, (34), 9 states have call successors, (34) Word has length 157
[2025-04-28 21:21:53,164 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:53,165 INFO  L225             Difference]: With dead ends: 44
[2025-04-28 21:21:53,165 INFO  L226             Difference]: Without dead ends: 44
[2025-04-28 21:21:53,165 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 308 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156
[2025-04-28 21:21:53,166 INFO  L437           NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:53,166 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 192 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:53,167 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2025-04-28 21:21:53,173 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44.
[2025-04-28 21:21:53,173 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 44 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 17 states have call successors, (17), 6 states have call predecessors, (17), 11 states have return successors, (47), 21 states have call predecessors, (47), 17 states have call successors, (47)
[2025-04-28 21:21:53,174 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 80 transitions.
[2025-04-28 21:21:53,174 INFO  L79                 Accepts]: Start accepts. Automaton has 44 states and 80 transitions. Word has length 157
[2025-04-28 21:21:53,174 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:53,175 INFO  L485      AbstractCegarLoop]: Abstraction has 44 states and 80 transitions.
[2025-04-28 21:21:53,175 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 7 states have (on average 4.0) internal successors, (28), 12 states have internal predecessors, (28), 9 states have call successors, (31), 2 states have call predecessors, (31), 7 states have return successors, (34), 6 states have call predecessors, (34), 9 states have call successors, (34)
[2025-04-28 21:21:53,175 INFO  L278                IsEmpty]: Start isEmpty. Operand 44 states and 80 transitions.
[2025-04-28 21:21:53,177 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 204
[2025-04-28 21:21:53,177 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:53,177 INFO  L218           NwaCegarLoop]: trace histogram [34, 26, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:53,184 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0
[2025-04-28 21:21:53,381 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2025-04-28 21:21:53,381 INFO  L403      AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:53,382 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:53,382 INFO  L85        PathProgramCache]: Analyzing trace with hash 2081313719, now seen corresponding path program 4 times
[2025-04-28 21:21:53,382 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:53,382 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189967857]
[2025-04-28 21:21:53,382 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:53,382 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:53,434 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 203 statements into 2 equivalence classes.
[2025-04-28 21:21:53,455 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 202 of 203 statements.
[2025-04-28 21:21:53,455 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s)
[2025-04-28 21:21:53,455 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:53,859 INFO  L134       CoverageAnalysis]: Checked inductivity of 1991 backedges. 50 proven. 198 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked.
[2025-04-28 21:21:53,859 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:53,859 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189967857]
[2025-04-28 21:21:53,859 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189967857] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:53,859 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456070053]
[2025-04-28 21:21:53,859 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:53,859 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:53,862 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:53,864 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:53,867 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2025-04-28 21:21:54,044 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 203 statements into 2 equivalence classes.
[2025-04-28 21:21:54,197 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 202 of 203 statements.
[2025-04-28 21:21:54,197 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s)
[2025-04-28 21:21:54,197 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:54,202 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 6 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:54,206 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:54,229 INFO  L134       CoverageAnalysis]: Checked inductivity of 1991 backedges. 656 proven. 3 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked.
[2025-04-28 21:21:54,231 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:55,205 INFO  L134       CoverageAnalysis]: Checked inductivity of 1991 backedges. 50 proven. 198 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked.
[2025-04-28 21:21:55,205 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [456070053] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:55,205 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:55,206 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6
[2025-04-28 21:21:55,206 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525255038]
[2025-04-28 21:21:55,206 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:55,206 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:55,206 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:55,207 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:55,207 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:55,207 INFO  L87              Difference]: Start difference. First operand 44 states and 80 transitions. Second operand  has 6 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (26), 4 states have call predecessors, (26), 5 states have call successors, (26)
[2025-04-28 21:21:55,293 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:55,293 INFO  L93              Difference]: Finished difference Result 43 states and 67 transitions.
[2025-04-28 21:21:55,293 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:55,294 INFO  L79                 Accepts]: Start accepts. Automaton has  has 6 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (26), 4 states have call predecessors, (26), 5 states have call successors, (26) Word has length 203
[2025-04-28 21:21:55,294 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:55,294 INFO  L225             Difference]: With dead ends: 43
[2025-04-28 21:21:55,294 INFO  L226             Difference]: Without dead ends: 43
[2025-04-28 21:21:55,295 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:55,295 INFO  L437           NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:55,295 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:55,296 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2025-04-28 21:21:55,302 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41.
[2025-04-28 21:21:55,304 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 41 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 17 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33)
[2025-04-28 21:21:55,305 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 65 transitions.
[2025-04-28 21:21:55,305 INFO  L79                 Accepts]: Start accepts. Automaton has 41 states and 65 transitions. Word has length 203
[2025-04-28 21:21:55,306 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:55,306 INFO  L485      AbstractCegarLoop]: Abstraction has 41 states and 65 transitions.
[2025-04-28 21:21:55,306 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (26), 4 states have call predecessors, (26), 5 states have call successors, (26)
[2025-04-28 21:21:55,306 INFO  L278                IsEmpty]: Start isEmpty. Operand 41 states and 65 transitions.
[2025-04-28 21:21:55,311 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 250
[2025-04-28 21:21:55,311 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:55,312 INFO  L218           NwaCegarLoop]: trace histogram [42, 32, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:55,319 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:55,512 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:55,513 INFO  L403      AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:55,513 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:55,513 INFO  L85        PathProgramCache]: Analyzing trace with hash -903989993, now seen corresponding path program 5 times
[2025-04-28 21:21:55,513 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:55,513 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240097392]
[2025-04-28 21:21:55,513 INFO  L95    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2025-04-28 21:21:55,514 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:55,546 INFO  L108    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 249 statements into 17 equivalence classes.
[2025-04-28 21:21:56,004 INFO  L111    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 249 of 249 statements.
[2025-04-28 21:21:56,005 INFO  L114    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s)
[2025-04-28 21:21:56,005 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
