./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-044.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:27,859 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:27,928 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0200268e-753b-46aa-bffd-5d3a83975d2e/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:27,933 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:27,933 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:27,977 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:27,978 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:27,978 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:27,979 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:27,979 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:27,979 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:27,979 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:27,979 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:27,980 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:27,980 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:27,980 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:27,980 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:27,980 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:27,980 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:27,982 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:27,983 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:27,983 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:27,983 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:27,983 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:27,983 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:27,985 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:27,985 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:28,330 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:28,340 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:28,344 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:28,347 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:28,348 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:28,349 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0200268e-753b-46aa-bffd-5d3a83975d2e/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-044.smt2
[2025-04-28 21:21:28,350 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:28,354 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:28,554 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0200268e-753b-46aa-bffd-5d3a83975d2e/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA/chc-comp24-LIA-044.smt2
[2025-04-28 21:21:28,557 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:28,558 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:28,559 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:28,559 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:28,560 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:28,562 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,585 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28 Unit
[2025-04-28 21:21:28,585 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:28,586 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:28,586 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:28,586 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:28,602 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,602 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,622 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,624 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,626 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,628 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,629 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,634 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,635 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,646 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:28,652 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:28,652 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:28,652 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:28,653 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (1/1) ...
[2025-04-28 21:21:28,656 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:28,672 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:28,687 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 21:21:28,692 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 21:21:28,706 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:28,707 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:28,707 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:28,707 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure ERR given in one single declaration
[2025-04-28 21:21:28,707 INFO  L130     BoogieDeclarations]: Found specification of procedure ERR
[2025-04-28 21:21:28,707 INFO  L138     BoogieDeclarations]: Found implementation of procedure ERR
[2025-04-28 21:21:28,707 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure MAIN given in one single declaration
[2025-04-28 21:21:28,708 INFO  L130     BoogieDeclarations]: Found specification of procedure MAIN
[2025-04-28 21:21:28,708 INFO  L138     BoogieDeclarations]: Found implementation of procedure MAIN
[2025-04-28 21:21:28,708 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure top_reset given in one single declaration
[2025-04-28 21:21:28,708 INFO  L130     BoogieDeclarations]: Found specification of procedure top_reset
[2025-04-28 21:21:28,709 INFO  L138     BoogieDeclarations]: Found implementation of procedure top_reset
[2025-04-28 21:21:28,709 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure INIT_STATE given in one single declaration
[2025-04-28 21:21:28,709 INFO  L130     BoogieDeclarations]: Found specification of procedure INIT_STATE
[2025-04-28 21:21:28,710 INFO  L138     BoogieDeclarations]: Found implementation of procedure INIT_STATE
[2025-04-28 21:21:28,711 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure top_step given in one single declaration
[2025-04-28 21:21:28,711 INFO  L130     BoogieDeclarations]: Found specification of procedure top_step
[2025-04-28 21:21:28,711 INFO  L138     BoogieDeclarations]: Found implementation of procedure top_step
[2025-04-28 21:21:28,711 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:28,711 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:28,711 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:28,779 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:28,782 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:28,917 INFO  L?                        ?]: Removed 8 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:28,917 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:28,934 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:28,935 INFO  L312             CfgBuilder]: Removed 4 assume(true) statements.
[2025-04-28 21:21:28,935 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:28 BoogieIcfgContainer
[2025-04-28 21:21:28,936 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:28,940 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:28,940 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:28,946 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:28,947 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:28" (1/3) ...
[2025-04-28 21:21:28,947 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342eef0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:28, skipping insertion in model container
[2025-04-28 21:21:28,947 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:28" (2/3) ...
[2025-04-28 21:21:28,948 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342eef0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:28, skipping insertion in model container
[2025-04-28 21:21:28,948 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:28" (3/3) ...
[2025-04-28 21:21:28,950 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:28,969 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:28,972 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 7 procedures, 26 locations, 36 edges, 7 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:29,039 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:29,060 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;@1d191618, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:29,060 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:29,067 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 26 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8)
[2025-04-28 21:21:29,076 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2025-04-28 21:21:29,077 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:29,077 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:29,078 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:29,084 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:29,084 INFO  L85        PathProgramCache]: Analyzing trace with hash -2087563048, now seen corresponding path program 1 times
[2025-04-28 21:21:29,095 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:29,095 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535500401]
[2025-04-28 21:21:29,096 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:29,096 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:29,146 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes.
[2025-04-28 21:21:29,167 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements.
[2025-04-28 21:21:29,169 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:29,169 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:29,591 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 21:21:29,592 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:29,592 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535500401]
[2025-04-28 21:21:29,593 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535500401] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:29,593 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:29,596 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2025-04-28 21:21:29,599 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016101624]
[2025-04-28 21:21:29,599 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:29,605 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2025-04-28 21:21:29,606 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:29,633 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2025-04-28 21:21:29,633 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:21:29,635 INFO  L87              Difference]: Start difference. First operand  has 26 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Second operand  has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2025-04-28 21:21:29,770 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:29,772 INFO  L93              Difference]: Finished difference Result 26 states and 28 transitions.
[2025-04-28 21:21:29,773 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:29,775 INFO  L79                 Accepts]: Start accepts. Automaton has  has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 22
[2025-04-28 21:21:29,776 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:29,785 INFO  L225             Difference]: With dead ends: 26
[2025-04-28 21:21:29,785 INFO  L226             Difference]: Without dead ends: 26
[2025-04-28 21:21:29,788 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2025-04-28 21:21:29,793 INFO  L437           NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:29,796 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 120 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:29,813 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2025-04-28 21:21:29,846 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26.
[2025-04-28 21:21:29,847 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 26 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 7 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9)
[2025-04-28 21:21:29,853 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions.
[2025-04-28 21:21:29,856 INFO  L79                 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22
[2025-04-28 21:21:29,857 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:29,857 INFO  L485      AbstractCegarLoop]: Abstraction has 26 states and 28 transitions.
[2025-04-28 21:21:29,858 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2025-04-28 21:21:29,858 INFO  L278                IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions.
[2025-04-28 21:21:29,860 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2025-04-28 21:21:29,861 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:29,861 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:29,861 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:29,861 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:29,862 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:29,864 INFO  L85        PathProgramCache]: Analyzing trace with hash 2099557298, now seen corresponding path program 1 times
[2025-04-28 21:21:29,864 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:29,864 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743088533]
[2025-04-28 21:21:29,864 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:29,864 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:29,884 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes.
[2025-04-28 21:21:29,893 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements.
[2025-04-28 21:21:29,926 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:29,927 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:30,471 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2025-04-28 21:21:30,472 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:30,472 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743088533]
[2025-04-28 21:21:30,472 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743088533] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:30,472 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765118730]
[2025-04-28 21:21:30,472 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:30,472 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:30,476 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:30,482 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 21:21:30,483 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:30,551 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes.
[2025-04-28 21:21:30,580 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements.
[2025-04-28 21:21:30,580 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:30,580 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:30,586 INFO  L256         TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:30,620 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:31,238 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2025-04-28 21:21:31,238 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:36,428 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2025-04-28 21:21:36,428 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765118730] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:36,428 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:36,428 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11
[2025-04-28 21:21:36,429 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129975555]
[2025-04-28 21:21:36,432 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:36,433 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2025-04-28 21:21:36,433 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:36,433 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2025-04-28 21:21:36,435 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:21:36,436 INFO  L87              Difference]: Start difference. First operand 26 states and 28 transitions. Second operand  has 11 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 5 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10)
[2025-04-28 21:21:36,542 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:36,542 INFO  L93              Difference]: Finished difference Result 28 states and 30 transitions.
[2025-04-28 21:21:36,545 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2025-04-28 21:21:36,545 INFO  L79                 Accepts]: Start accepts. Automaton has  has 11 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 5 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 29
[2025-04-28 21:21:36,545 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:36,546 INFO  L225             Difference]: With dead ends: 28
[2025-04-28 21:21:36,546 INFO  L226             Difference]: Without dead ends: 28
[2025-04-28 21:21:36,546 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156
[2025-04-28 21:21:36,547 INFO  L437           NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:36,547 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 190 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:36,548 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2025-04-28 21:21:36,553 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2025-04-28 21:21:36,555 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 12 states have (on average 1.0) internal successors, (12), 12 states have internal predecessors, (12), 7 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10)
[2025-04-28 21:21:36,556 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions.
[2025-04-28 21:21:36,556 INFO  L79                 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 29
[2025-04-28 21:21:36,556 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:36,557 INFO  L485      AbstractCegarLoop]: Abstraction has 28 states and 30 transitions.
[2025-04-28 21:21:36,557 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 5 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10)
[2025-04-28 21:21:36,557 INFO  L278                IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions.
[2025-04-28 21:21:36,558 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2025-04-28 21:21:36,559 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:36,559 INFO  L218           NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:36,565 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:36,759 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:36,760 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:36,760 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:36,760 INFO  L85        PathProgramCache]: Analyzing trace with hash -759971024, now seen corresponding path program 2 times
[2025-04-28 21:21:36,761 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:36,761 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932929002]
[2025-04-28 21:21:36,761 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:36,761 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:36,771 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes.
[2025-04-28 21:21:36,778 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements.
[2025-04-28 21:21:36,778 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:36,778 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:37,307 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:37,307 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:37,307 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932929002]
[2025-04-28 21:21:37,307 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932929002] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:37,308 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962053979]
[2025-04-28 21:21:37,308 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:37,308 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:37,311 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:37,313 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 21:21:37,317 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:37,379 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes.
[2025-04-28 21:21:37,403 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements.
[2025-04-28 21:21:37,404 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:37,404 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:37,405 INFO  L256         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:37,408 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:37,822 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:37,822 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:46,182 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:46,184 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962053979] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:46,184 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:46,184 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16
[2025-04-28 21:21:46,185 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781465186]
[2025-04-28 21:21:46,187 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:46,187 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2025-04-28 21:21:46,187 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:46,188 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2025-04-28 21:21:46,188 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240
[2025-04-28 21:21:46,188 INFO  L87              Difference]: Start difference. First operand 28 states and 30 transitions. Second operand  has 16 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14)
[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 31 states and 33 transitions.
[2025-04-28 21:21:46,363 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2025-04-28 21:21:46,363 INFO  L79                 Accepts]: Start accepts. Automaton has  has 16 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14) Word has length 36
[2025-04-28 21:21:46,363 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:46,364 INFO  L225             Difference]: With dead ends: 31
[2025-04-28 21:21:46,364 INFO  L226             Difference]: Without dead ends: 31
[2025-04-28 21:21:46,365 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420
[2025-04-28 21:21:46,365 INFO  L437           NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:46,366 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 194 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:46,366 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2025-04-28 21:21:46,369 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30.
[2025-04-28 21:21:46,370 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30 states, 13 states have (on average 1.0) internal successors, (13), 13 states have internal predecessors, (13), 7 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11)
[2025-04-28 21:21:46,370 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions.
[2025-04-28 21:21:46,370 INFO  L79                 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 36
[2025-04-28 21:21:46,371 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:46,371 INFO  L485      AbstractCegarLoop]: Abstraction has 30 states and 32 transitions.
[2025-04-28 21:21:46,371 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14)
[2025-04-28 21:21:46,371 INFO  L278                IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions.
[2025-04-28 21:21:46,372 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2025-04-28 21:21:46,372 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:46,372 INFO  L218           NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:46,376 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:46,574 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:46,574 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:46,574 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:46,574 INFO  L85        PathProgramCache]: Analyzing trace with hash -1606623350, now seen corresponding path program 3 times
[2025-04-28 21:21:46,574 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:46,574 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595773320]
[2025-04-28 21:21:46,574 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:46,574 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:46,584 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 4 equivalence classes.
[2025-04-28 21:21:46,594 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 43 of 43 statements.
[2025-04-28 21:21:46,594 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:46,594 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:47,334 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2025-04-28 21:21:47,335 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:47,335 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595773320]
[2025-04-28 21:21:47,335 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595773320] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:47,335 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344108217]
[2025-04-28 21:21:47,335 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:47,335 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:47,338 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:47,340 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 21:21:47,343 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:47,461 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 43 statements into 4 equivalence classes.
[2025-04-28 21:21:47,491 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 43 of 43 statements.
[2025-04-28 21:21:47,492 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:47,492 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:47,494 INFO  L256         TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:47,496 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:48,463 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2025-04-28 21:21:48,463 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
