./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-001.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:37,846 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:37,957 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08bf7d3-cbf7-4dde-b90d-7d7c92940ac9/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:37,963 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:37,965 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:37,997 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:37,999 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:37,999 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:38,000 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:38,001 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:38,001 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:38,001 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:38,001 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:38,001 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:38,001 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:38,002 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:38,002 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:38,002 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:38,002 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:38,002 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:38,002 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:38,002 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:38,003 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:38,003 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:38,003 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:38,004 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:38,004 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:38,372 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:38,390 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:38,392 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:38,395 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:38,396 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:38,398 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08bf7d3-cbf7-4dde-b90d-7d7c92940ac9/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-001.smt2
[2025-04-28 21:21:38,400 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:38,404 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:38,606 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c08bf7d3-cbf7-4dde-b90d-7d7c92940ac9/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-001.smt2
[2025-04-28 21:21:38,608 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:38,611 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:38,612 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:38,612 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:38,612 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:38,614 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,643 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38 Unit
[2025-04-28 21:21:38,643 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:38,644 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:38,644 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:38,644 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:38,662 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,662 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,693 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,694 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,697 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,697 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,699 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,700 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,701 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,718 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:38,719 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:38,719 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:38,719 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:38,720 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (1/1) ...
[2025-04-28 21:21:38,723 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:38,740 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:38,754 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 21:21:38,761 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 21:21:38,773 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:38,773 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:38,774 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:38,774 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure CHC_COMP_FALSE given in one single declaration
[2025-04-28 21:21:38,774 INFO  L130     BoogieDeclarations]: Found specification of procedure CHC_COMP_FALSE
[2025-04-28 21:21:38,774 INFO  L138     BoogieDeclarations]: Found implementation of procedure CHC_COMP_FALSE
[2025-04-28 21:21:38,774 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure end given in one single declaration
[2025-04-28 21:21:38,774 INFO  L130     BoogieDeclarations]: Found specification of procedure end
[2025-04-28 21:21:38,774 INFO  L138     BoogieDeclarations]: Found implementation of procedure end
[2025-04-28 21:21:38,774 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure loop given in one single declaration
[2025-04-28 21:21:38,774 INFO  L130     BoogieDeclarations]: Found specification of procedure loop
[2025-04-28 21:21:38,774 INFO  L138     BoogieDeclarations]: Found implementation of procedure loop
[2025-04-28 21:21:38,774 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure incr given in one single declaration
[2025-04-28 21:21:38,775 INFO  L130     BoogieDeclarations]: Found specification of procedure incr
[2025-04-28 21:21:38,775 INFO  L138     BoogieDeclarations]: Found implementation of procedure incr
[2025-04-28 21:21:38,775 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure write given in one single declaration
[2025-04-28 21:21:38,775 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2025-04-28 21:21:38,775 INFO  L138     BoogieDeclarations]: Found implementation of procedure write
[2025-04-28 21:21:38,775 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:38,775 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:38,775 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:38,815 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:38,817 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:38,927 INFO  L?                        ?]: Removed 2 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:38,928 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:38,946 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:38,947 INFO  L312             CfgBuilder]: Removed 1 assume(true) statements.
[2025-04-28 21:21:38,948 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:38 BoogieIcfgContainer
[2025-04-28 21:21:38,948 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:38,951 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:38,952 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:38,958 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:38,958 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:38" (1/3) ...
[2025-04-28 21:21:38,959 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148145c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:38, skipping insertion in model container
[2025-04-28 21:21:38,959 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:38" (2/3) ...
[2025-04-28 21:21:38,960 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148145c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:38, skipping insertion in model container
[2025-04-28 21:21:38,960 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:38" (3/3) ...
[2025-04-28 21:21:38,961 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:38,978 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:38,981 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 7 procedures, 30 locations, 44 edges, 7 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:39,025 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:39,038 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;@45162e74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:39,038 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:39,043 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 30 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 17 states have internal predecessors, (17), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9)
[2025-04-28 21:21:39,054 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2025-04-28 21:21:39,055 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:39,056 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:39,056 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:39,063 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:39,063 INFO  L85        PathProgramCache]: Analyzing trace with hash -987862439, now seen corresponding path program 1 times
[2025-04-28 21:21:39,072 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:39,073 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354851867]
[2025-04-28 21:21:39,073 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:39,074 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:39,104 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes.
[2025-04-28 21:21:39,132 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements.
[2025-04-28 21:21:39,133 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:39,133 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:39,306 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2025-04-28 21:21:39,307 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:39,307 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354851867]
[2025-04-28 21:21:39,308 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354851867] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:39,308 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:39,311 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:39,313 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28128470]
[2025-04-28 21:21:39,314 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:39,319 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:39,319 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:39,353 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:39,353 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:39,356 INFO  L87              Difference]: Start difference. First operand  has 30 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 17 states have internal predecessors, (17), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) Second operand  has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4)
[2025-04-28 21:21:39,426 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:39,427 INFO  L93              Difference]: Finished difference Result 30 states and 35 transitions.
[2025-04-28 21:21:39,429 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:39,431 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16
[2025-04-28 21:21:39,431 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:39,439 INFO  L225             Difference]: With dead ends: 30
[2025-04-28 21:21:39,439 INFO  L226             Difference]: Without dead ends: 30
[2025-04-28 21:21:39,442 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:21:39,446 INFO  L437           NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:39,447 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:39,467 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2025-04-28 21:21:39,508 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2025-04-28 21:21:39,510 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 16 states have internal predecessors, (16), 9 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10)
[2025-04-28 21:21:39,517 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions.
[2025-04-28 21:21:39,519 INFO  L79                 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16
[2025-04-28 21:21:39,519 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:39,519 INFO  L485      AbstractCegarLoop]: Abstraction has 30 states and 35 transitions.
[2025-04-28 21:21:39,520 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4)
[2025-04-28 21:21:39,520 INFO  L278                IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions.
[2025-04-28 21:21:39,522 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2025-04-28 21:21:39,524 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:39,524 INFO  L218           NwaCegarLoop]: trace histogram [2, 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 21:21:39,525 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:39,525 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:39,526 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:39,526 INFO  L85        PathProgramCache]: Analyzing trace with hash -1139223296, now seen corresponding path program 1 times
[2025-04-28 21:21:39,526 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:39,527 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9736563]
[2025-04-28 21:21:39,527 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:39,527 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:39,548 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes.
[2025-04-28 21:21:39,571 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements.
[2025-04-28 21:21:39,572 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:39,572 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:40,046 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 21:21:40,047 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:40,047 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9736563]
[2025-04-28 21:21:40,047 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9736563] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:40,047 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426886047]
[2025-04-28 21:21:40,047 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:40,048 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:40,055 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:40,060 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 21:21:40,064 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:40,117 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes.
[2025-04-28 21:21:40,149 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements.
[2025-04-28 21:21:40,149 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:40,149 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:40,152 INFO  L256         TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:40,163 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:40,334 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 21:21:40,334 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:41,034 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 21:21:41,037 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [426886047] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:41,037 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:41,037 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11
[2025-04-28 21:21:41,038 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785039559]
[2025-04-28 21:21:41,039 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:41,040 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2025-04-28 21:21:41,040 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:41,043 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2025-04-28 21:21:41,043 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:21:41,044 INFO  L87              Difference]: Start difference. First operand 30 states and 35 transitions. Second operand  has 11 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 11 states have internal predecessors, (16), 5 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9)
[2025-04-28 21:21:41,215 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:41,215 INFO  L93              Difference]: Finished difference Result 42 states and 49 transitions.
[2025-04-28 21:21:41,216 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2025-04-28 21:21:41,216 INFO  L79                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 11 states have internal predecessors, (16), 5 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 28
[2025-04-28 21:21:41,216 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:41,217 INFO  L225             Difference]: With dead ends: 42
[2025-04-28 21:21:41,218 INFO  L226             Difference]: Without dead ends: 42
[2025-04-28 21:21:41,218 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:41,219 INFO  L437           NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:41,220 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 272 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:41,220 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2025-04-28 21:21:41,233 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38.
[2025-04-28 21:21:41,233 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 38 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 20 states have internal predecessors, (20), 9 states have call successors, (9), 6 states have call predecessors, (9), 11 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16)
[2025-04-28 21:21:41,235 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions.
[2025-04-28 21:21:41,235 INFO  L79                 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 28
[2025-04-28 21:21:41,236 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:41,237 INFO  L485      AbstractCegarLoop]: Abstraction has 38 states and 45 transitions.
[2025-04-28 21:21:41,237 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 11 states have internal predecessors, (16), 5 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9)
[2025-04-28 21:21:41,237 INFO  L278                IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions.
[2025-04-28 21:21:41,238 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2025-04-28 21:21:41,239 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:41,239 INFO  L218           NwaCegarLoop]: trace histogram [2, 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 21:21:41,245 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:41,443 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:41,443 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:41,444 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:41,444 INFO  L85        PathProgramCache]: Analyzing trace with hash -848356963, now seen corresponding path program 1 times
[2025-04-28 21:21:41,444 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:41,444 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413403536]
[2025-04-28 21:21:41,444 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:41,444 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:41,451 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes.
[2025-04-28 21:21:41,461 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements.
[2025-04-28 21:21:41,461 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:41,461 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:41,759 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 21:21:41,759 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:41,760 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413403536]
[2025-04-28 21:21:41,760 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413403536] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:41,760 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721150490]
[2025-04-28 21:21:41,760 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:41,760 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:41,763 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:41,766 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 21:21:41,770 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:41,804 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes.
[2025-04-28 21:21:41,822 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements.
[2025-04-28 21:21:41,822 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:41,822 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:41,823 INFO  L256         TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:41,825 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:41,904 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 21:21:41,905 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:42,418 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 21:21:42,419 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [721150490] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:42,419 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:42,419 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12
[2025-04-28 21:21:42,419 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609747776]
[2025-04-28 21:21:42,419 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:42,420 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2025-04-28 21:21:42,420 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:42,423 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2025-04-28 21:21:42,423 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:42,423 INFO  L87              Difference]: Start difference. First operand 38 states and 45 transitions. Second operand  has 12 states, 8 states have (on average 2.125) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10)
[2025-04-28 21:21:42,576 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:42,576 INFO  L93              Difference]: Finished difference Result 42 states and 48 transitions.
[2025-04-28 21:21:42,577 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2025-04-28 21:21:42,577 INFO  L79                 Accepts]: Start accepts. Automaton has  has 12 states, 8 states have (on average 2.125) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 28
[2025-04-28 21:21:42,577 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:42,578 INFO  L225             Difference]: With dead ends: 42
[2025-04-28 21:21:42,578 INFO  L226             Difference]: Without dead ends: 40
[2025-04-28 21:21:42,578 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156
[2025-04-28 21:21:42,579 INFO  L437           NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:42,580 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 286 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:42,580 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2025-04-28 21:21:42,585 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36.
[2025-04-28 21:21:42,585 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 36 states, 16 states have (on average 1.1875) internal successors, (19), 19 states have internal predecessors, (19), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14)
[2025-04-28 21:21:42,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions.
[2025-04-28 21:21:42,586 INFO  L79                 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 28
[2025-04-28 21:21:42,586 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:42,586 INFO  L485      AbstractCegarLoop]: Abstraction has 36 states and 42 transitions.
[2025-04-28 21:21:42,586 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 8 states have (on average 2.125) internal successors, (17), 12 states have internal predecessors, (17), 5 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10)
[2025-04-28 21:21:42,587 INFO  L278                IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions.
[2025-04-28 21:21:42,587 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2025-04-28 21:21:42,588 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:42,588 INFO  L218           NwaCegarLoop]: trace histogram [2, 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 21:21:42,593 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:21:42,792 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:42,792 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:42,793 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:42,793 INFO  L85        PathProgramCache]: Analyzing trace with hash 1518027683, now seen corresponding path program 1 times
[2025-04-28 21:21:42,793 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:42,793 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221218057]
[2025-04-28 21:21:42,793 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:42,793 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:42,798 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes.
[2025-04-28 21:21:42,808 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements.
[2025-04-28 21:21:42,808 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:42,808 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:43,087 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 21:21:43,087 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:43,088 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221218057]
[2025-04-28 21:21:43,088 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221218057] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:43,088 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877355699]
[2025-04-28 21:21:43,088 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:43,088 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:43,091 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:43,094 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 21:21:43,098 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:43,140 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes.
[2025-04-28 21:21:43,156 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements.
[2025-04-28 21:21:43,156 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:43,156 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:43,157 INFO  L256         TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:43,161 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:43,407 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 21:21:43,407 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:46,115 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 21:21:46,115 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [877355699] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:46,116 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:46,116 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18
[2025-04-28 21:21:46,116 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998569345]
[2025-04-28 21:21:46,116 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:46,117 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2025-04-28 21:21:46,117 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:46,118 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2025-04-28 21:21:46,118 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306
[2025-04-28 21:21:46,118 INFO  L87              Difference]: Start difference. First operand 36 states and 42 transitions. Second operand  has 18 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 18 states have internal predecessors, (25), 7 states have call successors, (10), 1 states have call predecessors, (10), 11 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15)
[2025-04-28 21:21:46,362 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:46,362 INFO  L93              Difference]: Finished difference Result 48 states and 55 transitions.
[2025-04-28 21:21:46,363 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2025-04-28 21:21:46,364 INFO  L79                 Accepts]: Start accepts. Automaton has  has 18 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 18 states have internal predecessors, (25), 7 states have call successors, (10), 1 states have call predecessors, (10), 11 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 28
[2025-04-28 21:21:46,365 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:46,366 INFO  L225             Difference]: With dead ends: 48
[2025-04-28 21:21:46,366 INFO  L226             Difference]: Without dead ends: 48
[2025-04-28 21:21:46,367 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420
[2025-04-28 21:21:46,368 INFO  L437           NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:46,368 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 241 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:21:46,373 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2025-04-28 21:21:46,386 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42.
[2025-04-28 21:21:46,387 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 42 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 22 states have internal predecessors, (22), 9 states have call successors, (9), 6 states have call predecessors, (9), 13 states have return successors, (18), 13 states have call predecessors, (18), 9 states have call successors, (18)
[2025-04-28 21:21:46,388 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions.
[2025-04-28 21:21:46,388 INFO  L79                 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28
[2025-04-28 21:21:46,389 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:46,389 INFO  L485      AbstractCegarLoop]: Abstraction has 42 states and 49 transitions.
[2025-04-28 21:21:46,389 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 18 states have internal predecessors, (25), 7 states have call successors, (10), 1 states have call predecessors, (10), 11 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15)
[2025-04-28 21:21:46,389 INFO  L278                IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions.
[2025-04-28 21:21:46,393 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2025-04-28 21:21:46,393 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:46,393 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:46,399 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2025-04-28 21:21:46,593 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:46,594 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:46,594 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:46,594 INFO  L85        PathProgramCache]: Analyzing trace with hash -1055431193, now seen corresponding path program 1 times
[2025-04-28 21:21:46,594 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:46,595 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275721394]
[2025-04-28 21:21:46,595 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:46,595 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:46,602 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes.
[2025-04-28 21:21:46,618 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements.
[2025-04-28 21:21:46,618 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:46,618 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:46,871 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2025-04-28 21:21:46,871 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:46,872 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275721394]
[2025-04-28 21:21:46,872 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275721394] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:46,872 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:46,872 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2025-04-28 21:21:46,872 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812129089]
[2025-04-28 21:21:46,873 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:46,873 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:21:46,874 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:46,875 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:21:46,875 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:46,877 INFO  L87              Difference]: Start difference. First operand 42 states and 49 transitions. Second operand  has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9)
[2025-04-28 21:21:46,935 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:46,935 INFO  L93              Difference]: Finished difference Result 50 states and 58 transitions.
[2025-04-28 21:21:46,937 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:46,937 INFO  L79                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 40
[2025-04-28 21:21:46,937 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:46,938 INFO  L225             Difference]: With dead ends: 50
[2025-04-28 21:21:46,940 INFO  L226             Difference]: Without dead ends: 50
[2025-04-28 21:21:46,940 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:21:46,941 INFO  L437           NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:46,941 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:46,944 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2025-04-28 21:21:46,953 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48.
[2025-04-28 21:21:46,957 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 48 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 25 states have internal predecessors, (25), 9 states have call successors, (9), 6 states have call predecessors, (9), 16 states have return successors, (22), 16 states have call predecessors, (22), 9 states have call successors, (22)
[2025-04-28 21:21:46,958 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions.
[2025-04-28 21:21:46,958 INFO  L79                 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 40
[2025-04-28 21:21:46,958 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:46,958 INFO  L485      AbstractCegarLoop]: Abstraction has 48 states and 56 transitions.
[2025-04-28 21:21:46,959 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9)
[2025-04-28 21:21:46,959 INFO  L278                IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions.
[2025-04-28 21:21:46,960 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2025-04-28 21:21:46,961 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:46,962 INFO  L218           NwaCegarLoop]: trace histogram [3, 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 21:21:46,962 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2025-04-28 21:21:46,962 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:46,962 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:46,963 INFO  L85        PathProgramCache]: Analyzing trace with hash 158764903, now seen corresponding path program 2 times
[2025-04-28 21:21:46,963 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:46,963 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454381400]
[2025-04-28 21:21:46,963 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:46,963 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:46,974 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes.
[2025-04-28 21:21:46,996 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements.
[2025-04-28 21:21:47,000 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:47,000 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:47,250 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2025-04-28 21:21:47,251 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:47,251 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454381400]
[2025-04-28 21:21:47,251 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454381400] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:47,251 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030034104]
[2025-04-28 21:21:47,251 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:47,251 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:47,257 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:47,259 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 21:21:47,263 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2025-04-28 21:21:47,311 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes.
[2025-04-28 21:21:47,331 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements.
[2025-04-28 21:21:47,331 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:47,331 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:47,333 INFO  L256         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:47,334 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:47,535 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:47,535 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:48,354 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:48,355 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030034104] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:48,355 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:48,355 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 19
[2025-04-28 21:21:48,355 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760084501]
[2025-04-28 21:21:48,355 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:48,355 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2025-04-28 21:21:48,355 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:48,356 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2025-04-28 21:21:48,356 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:21:48,356 INFO  L87              Difference]: Start difference. First operand 48 states and 56 transitions. Second operand  has 19 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 19 states have internal predecessors, (30), 8 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 12 states have call predecessors, (19), 8 states have call successors, (19)
[2025-04-28 21:21:48,700 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:48,700 INFO  L93              Difference]: Finished difference Result 64 states and 73 transitions.
[2025-04-28 21:21:48,701 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2025-04-28 21:21:48,701 INFO  L79                 Accepts]: Start accepts. Automaton has  has 19 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 19 states have internal predecessors, (30), 8 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 12 states have call predecessors, (19), 8 states have call successors, (19) Word has length 40
[2025-04-28 21:21:48,702 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:48,704 INFO  L225             Difference]: With dead ends: 64
[2025-04-28 21:21:48,704 INFO  L226             Difference]: Without dead ends: 60
[2025-04-28 21:21:48,705 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650
[2025-04-28 21:21:48,705 INFO  L437           NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:48,706 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 402 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:21:48,706 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2025-04-28 21:21:48,711 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38.
[2025-04-28 21:21:48,711 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 38 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 20 states have internal predecessors, (20), 9 states have call successors, (9), 6 states have call predecessors, (9), 11 states have return successors, (15), 12 states have call predecessors, (15), 9 states have call successors, (15)
[2025-04-28 21:21:48,712 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions.
[2025-04-28 21:21:48,712 INFO  L79                 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 40
[2025-04-28 21:21:48,712 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:48,712 INFO  L485      AbstractCegarLoop]: Abstraction has 38 states and 44 transitions.
[2025-04-28 21:21:48,713 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 19 states have internal predecessors, (30), 8 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 12 states have call predecessors, (19), 8 states have call successors, (19)
[2025-04-28 21:21:48,713 INFO  L278                IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions.
[2025-04-28 21:21:48,713 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2025-04-28 21:21:48,714 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:48,714 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:48,722 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:48,917 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:48,918 INFO  L403      AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:48,918 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:48,918 INFO  L85        PathProgramCache]: Analyzing trace with hash 934343818, now seen corresponding path program 1 times
[2025-04-28 21:21:48,918 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:48,918 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810202742]
[2025-04-28 21:21:48,918 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:48,918 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:48,923 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes.
[2025-04-28 21:21:48,931 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements.
[2025-04-28 21:21:48,931 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:48,931 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:49,080 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2025-04-28 21:21:49,080 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:49,080 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810202742]
[2025-04-28 21:21:49,080 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810202742] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:49,080 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977959444]
[2025-04-28 21:21:49,080 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:49,080 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:49,083 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:49,085 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 21:21:49,088 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2025-04-28 21:21:49,145 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes.
[2025-04-28 21:21:49,164 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements.
[2025-04-28 21:21:49,165 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:49,165 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:49,166 INFO  L256         TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 22 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:49,168 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:49,228 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2025-04-28 21:21:49,228 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:49,943 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2025-04-28 21:21:49,943 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977959444] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:49,943 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:49,943 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12
[2025-04-28 21:21:49,943 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110994446]
[2025-04-28 21:21:49,943 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:49,944 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2025-04-28 21:21:49,944 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:49,944 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2025-04-28 21:21:49,944 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:49,944 INFO  L87              Difference]: Start difference. First operand 38 states and 44 transitions. Second operand  has 12 states, 8 states have (on average 2.25) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11)
[2025-04-28 21:21:50,063 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:50,063 INFO  L93              Difference]: Finished difference Result 56 states and 65 transitions.
[2025-04-28 21:21:50,063 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2025-04-28 21:21:50,064 INFO  L79                 Accepts]: Start accepts. Automaton has  has 12 states, 8 states have (on average 2.25) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 40
[2025-04-28 21:21:50,064 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:50,065 INFO  L225             Difference]: With dead ends: 56
[2025-04-28 21:21:50,065 INFO  L226             Difference]: Without dead ends: 56
[2025-04-28 21:21:50,065 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156
[2025-04-28 21:21:50,066 INFO  L437           NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:50,066 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 302 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:50,067 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2025-04-28 21:21:50,073 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54.
[2025-04-28 21:21:50,073 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 54 states, 25 states have (on average 1.12) internal successors, (28), 28 states have internal predecessors, (28), 9 states have call successors, (9), 6 states have call predecessors, (9), 19 states have return successors, (26), 19 states have call predecessors, (26), 9 states have call successors, (26)
[2025-04-28 21:21:50,074 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions.
[2025-04-28 21:21:50,074 INFO  L79                 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 40
[2025-04-28 21:21:50,074 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:50,074 INFO  L485      AbstractCegarLoop]: Abstraction has 54 states and 63 transitions.
[2025-04-28 21:21:50,075 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 8 states have (on average 2.25) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11)
[2025-04-28 21:21:50,075 INFO  L278                IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions.
[2025-04-28 21:21:50,076 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2025-04-28 21:21:50,076 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:50,076 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:50,082 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2025-04-28 21:21:50,280 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:50,280 INFO  L403      AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:50,281 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:50,281 INFO  L85        PathProgramCache]: Analyzing trace with hash -2040388953, now seen corresponding path program 2 times
[2025-04-28 21:21:50,281 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:50,281 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477669704]
[2025-04-28 21:21:50,281 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:50,281 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:50,285 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes.
[2025-04-28 21:21:50,293 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements.
[2025-04-28 21:21:50,293 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:50,294 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:50,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2025-04-28 21:21:50,601 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:50,601 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477669704]
[2025-04-28 21:21:50,601 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477669704] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:50,601 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063153107]
[2025-04-28 21:21:50,601 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:50,601 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:50,603 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:50,606 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 21:21:50,611 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2025-04-28 21:21:50,662 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes.
[2025-04-28 21:21:50,686 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements.
[2025-04-28 21:21:50,686 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:50,686 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:50,688 INFO  L256         TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:50,689 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:50,849 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2025-04-28 21:21:50,849 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:51,554 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2025-04-28 21:21:51,554 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063153107] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:51,554 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:51,554 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 17
[2025-04-28 21:21:51,554 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732925984]
[2025-04-28 21:21:51,555 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:51,555 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 17 states
[2025-04-28 21:21:51,555 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:51,556 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2025-04-28 21:21:51,556 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272
[2025-04-28 21:21:51,556 INFO  L87              Difference]: Start difference. First operand 54 states and 63 transitions. Second operand  has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 17 states have internal predecessors, (27), 6 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (18), 12 states have call predecessors, (18), 6 states have call successors, (18)
[2025-04-28 21:21:51,773 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:51,773 INFO  L93              Difference]: Finished difference Result 54 states and 61 transitions.
[2025-04-28 21:21:51,774 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2025-04-28 21:21:51,774 INFO  L79                 Accepts]: Start accepts. Automaton has  has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 17 states have internal predecessors, (27), 6 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (18), 12 states have call predecessors, (18), 6 states have call successors, (18) Word has length 40
[2025-04-28 21:21:51,775 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:51,776 INFO  L225             Difference]: With dead ends: 54
[2025-04-28 21:21:51,776 INFO  L226             Difference]: Without dead ends: 51
[2025-04-28 21:21:51,776 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:21:51,777 INFO  L437           NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:51,777 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 386 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:21:51,778 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2025-04-28 21:21:51,783 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41.
[2025-04-28 21:21:51,783 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 41 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 13 states have return successors, (17), 13 states have call predecessors, (17), 8 states have call successors, (17)
[2025-04-28 21:21:51,784 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions.
[2025-04-28 21:21:51,784 INFO  L79                 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 40
[2025-04-28 21:21:51,784 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:51,784 INFO  L485      AbstractCegarLoop]: Abstraction has 41 states and 46 transitions.
[2025-04-28 21:21:51,785 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 17 states have internal predecessors, (27), 6 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (18), 12 states have call predecessors, (18), 6 states have call successors, (18)
[2025-04-28 21:21:51,785 INFO  L278                IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions.
[2025-04-28 21:21:51,786 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2025-04-28 21:21:51,786 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:51,786 INFO  L218           NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:51,793 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2025-04-28 21:21:51,990 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:51,990 INFO  L403      AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:51,991 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:51,991 INFO  L85        PathProgramCache]: Analyzing trace with hash 978052401, now seen corresponding path program 2 times
[2025-04-28 21:21:51,991 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:51,991 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415320766]
[2025-04-28 21:21:51,991 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:51,991 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:51,996 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes.
[2025-04-28 21:21:52,004 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements.
[2025-04-28 21:21:52,004 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:52,004 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:52,258 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2025-04-28 21:21:52,258 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:52,258 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415320766]
[2025-04-28 21:21:52,259 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415320766] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:52,259 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357452199]
[2025-04-28 21:21:52,259 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:52,259 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:52,261 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:52,263 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 21:21:52,267 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2025-04-28 21:21:52,332 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes.
[2025-04-28 21:21:52,355 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements.
[2025-04-28 21:21:52,355 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:52,355 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:52,357 INFO  L256         TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:52,359 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:52,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2025-04-28 21:21:52,620 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:53,761 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2025-04-28 21:21:53,761 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [357452199] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:53,761 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:53,762 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 22
[2025-04-28 21:21:53,762 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465110062]
[2025-04-28 21:21:53,762 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:53,762 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2025-04-28 21:21:53,762 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:53,763 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2025-04-28 21:21:53,763 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462
[2025-04-28 21:21:53,764 INFO  L87              Difference]: Start difference. First operand 41 states and 46 transitions. Second operand  has 22 states, 16 states have (on average 2.125) internal successors, (34), 22 states have internal predecessors, (34), 8 states have call successors, (14), 1 states have call predecessors, (14), 16 states have return successors, (24), 15 states have call predecessors, (24), 8 states have call successors, (24)
[2025-04-28 21:21:54,136 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:54,137 INFO  L93              Difference]: Finished difference Result 65 states and 74 transitions.
[2025-04-28 21:21:54,137 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2025-04-28 21:21:54,137 INFO  L79                 Accepts]: Start accepts. Automaton has  has 22 states, 16 states have (on average 2.125) internal successors, (34), 22 states have internal predecessors, (34), 8 states have call successors, (14), 1 states have call predecessors, (14), 16 states have return successors, (24), 15 states have call predecessors, (24), 8 states have call successors, (24) Word has length 52
[2025-04-28 21:21:54,138 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:54,138 INFO  L225             Difference]: With dead ends: 65
[2025-04-28 21:21:54,138 INFO  L226             Difference]: Without dead ends: 0
[2025-04-28 21:21:54,139 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870
[2025-04-28 21:21:54,139 INFO  L437           NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:54,140 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 351 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:21:54,140 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2025-04-28 21:21:54,140 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2025-04-28 21:21:54,141 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2025-04-28 21:21:54,141 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2025-04-28 21:21:54,141 INFO  L79                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52
[2025-04-28 21:21:54,141 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:54,141 INFO  L485      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2025-04-28 21:21:54,141 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 22 states, 16 states have (on average 2.125) internal successors, (34), 22 states have internal predecessors, (34), 8 states have call successors, (14), 1 states have call predecessors, (14), 16 states have return successors, (24), 15 states have call predecessors, (24), 8 states have call successors, (24)
[2025-04-28 21:21:54,141 INFO  L278                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2025-04-28 21:21:54,142 INFO  L284                IsEmpty]: Finished isEmpty. No accepting run.
[2025-04-28 21:21:54,144 INFO  L790   garLoopResultBuilder]: Registering result SAFE for location Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY (0 of 1 remaining)
[2025-04-28 21:21:54,149 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2025-04-28 21:21:54,348 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2025-04-28 21:21:54,352 INFO  L422         BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1]
[2025-04-28 21:21:54,354 INFO  L171   ceAbstractionStarter]: Computing trace abstraction results
[2025-04-28 21:21:54,357 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 09:21:54 BoogieIcfgContainer
[2025-04-28 21:21:54,357 INFO  L131        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2025-04-28 21:21:54,357 INFO  L158              Benchmark]: Toolchain (without parser) took 15747.75ms. Allocated memory is still 234.9MB. Free memory was 164.4MB in the beginning and 92.4MB in the end (delta: 71.9MB). Peak memory consumption was 76.7MB. Max. memory is 33.6GB.
[2025-04-28 21:21:54,358 INFO  L158              Benchmark]: SmtParser took 1.34ms. Allocated memory is still 234.9MB. Free memory is still 171.4MB. There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:54,358 INFO  L158              Benchmark]: ChcToBoogie took 32.11ms. Allocated memory is still 234.9MB. Free memory was 164.4MB in the beginning and 163.6MB in the end (delta: 738.0kB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:54,358 INFO  L158              Benchmark]: Boogie Preprocessor took 73.85ms. Allocated memory is still 234.9MB. Free memory was 163.6MB in the beginning and 159.3MB in the end (delta: 4.4MB). There was no memory consumed. Max. memory is 33.6GB.
[2025-04-28 21:21:54,359 INFO  L158              Benchmark]: RCFGBuilder took 229.48ms. Allocated memory is still 234.9MB. Free memory was 159.3MB in the beginning and 150.5MB in the end (delta: 8.7MB). Peak memory consumption was 16.8MB. Max. memory is 33.6GB.
[2025-04-28 21:21:54,359 INFO  L158              Benchmark]: TraceAbstraction took 15405.31ms. Allocated memory is still 234.9MB. Free memory was 149.8MB in the beginning and 92.4MB in the end (delta: 57.4MB). Peak memory consumption was 60.0MB. Max. memory is 33.6GB.
[2025-04-28 21:21:54,360 INFO  L338   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * SmtParser took 1.34ms. Allocated memory is still 234.9MB. Free memory is still 171.4MB. There was no memory consumed. Max. memory is 33.6GB.
 * ChcToBoogie took 32.11ms. Allocated memory is still 234.9MB. Free memory was 164.4MB in the beginning and 163.6MB in the end (delta: 738.0kB). There was no memory consumed. Max. memory is 33.6GB.
 * Boogie Preprocessor took 73.85ms. Allocated memory is still 234.9MB. Free memory was 163.6MB in the beginning and 159.3MB in the end (delta: 4.4MB). There was no memory consumed. Max. memory is 33.6GB.
 * RCFGBuilder took 229.48ms. Allocated memory is still 234.9MB. Free memory was 159.3MB in the beginning and 150.5MB in the end (delta: 8.7MB). Peak memory consumption was 16.8MB. Max. memory is 33.6GB.
 * TraceAbstraction took 15405.31ms. Allocated memory is still 234.9MB. Free memory was 149.8MB in the beginning and 92.4MB in the end (delta: 57.4MB). Peak memory consumption was 60.0MB. Max. memory is 33.6GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - PositiveResult [Unknown line] : the set of constraint Horn clauses is satisfiable
    For all program executions holds that the set of constraint Horn clauses is satisfiable at this location
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 7 procedures, 30 locations, 44 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.3s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 56 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34 mSDsluCounter, 2482 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2209 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 975 IncrementalHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 273 mSDtfsCounter, 975 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 601 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, InterpolantAutomatonStates: 105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 50 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 568 NumberOfCodeBlocks, 568 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 2393 SizeOfPredicates, 12 NumberOfNonLiveVariables, 805 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 211/329 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
RESULT: Ultimate proved your program to be correct!
[2025-04-28 21:21:54,372 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0
Received shutdown request...
sat
