./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-045.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:21,745 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:21,836 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8be02cb1-933d-450d-9614-9955c3e4f780/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:21,841 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:21,842 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:21,864 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:21,865 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:21,866 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:21,866 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:21,867 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:21,868 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:21,868 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:21,868 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:21,869 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:21,869 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:21,869 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:21,869 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:21,869 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:21,870 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:21,870 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:21,870 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:21,870 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:21,870 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:21,870 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:21,870 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:21,871 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:21,872 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:22,199 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:22,211 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:22,214 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:22,217 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:22,217 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:22,220 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8be02cb1-933d-450d-9614-9955c3e4f780/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-045.smt2
[2025-04-28 21:21:22,223 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:22,230 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:22,483 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8be02cb1-933d-450d-9614-9955c3e4f780/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-045.smt2
[2025-04-28 21:21:22,489 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:22,492 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:22,493 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:22,493 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:22,493 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:22,496 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,537 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22 Unit
[2025-04-28 21:21:22,537 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:22,538 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:22,538 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:22,539 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:22,566 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,566 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,601 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,601 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,605 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,606 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,608 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,609 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,610 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,624 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:22,625 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:22,625 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:22,625 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:22,626 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (1/1) ...
[2025-04-28 21:21:22,629 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:22,648 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:22,664 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 21:21:22,669 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 21:21:22,684 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:22,685 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:22,686 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:22,687 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure state given in one single declaration
[2025-04-28 21:21:22,687 INFO  L130     BoogieDeclarations]: Found specification of procedure state
[2025-04-28 21:21:22,687 INFO  L138     BoogieDeclarations]: Found implementation of procedure state
[2025-04-28 21:21:22,687 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:22,687 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:22,687 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:22,760 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:22,762 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:22,974 INFO  L?                        ?]: Removed 0 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:22,975 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:22,993 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:22,995 INFO  L312             CfgBuilder]: Removed 0 assume(true) statements.
[2025-04-28 21:21:22,996 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:22 BoogieIcfgContainer
[2025-04-28 21:21:22,997 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:23,000 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:23,003 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:23,012 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:23,012 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:22" (1/3) ...
[2025-04-28 21:21:23,013 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a45759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:23, skipping insertion in model container
[2025-04-28 21:21:23,013 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:22" (2/3) ...
[2025-04-28 21:21:23,013 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a45759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:23, skipping insertion in model container
[2025-04-28 21:21:23,013 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:22" (3/3) ...
[2025-04-28 21:21:23,015 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:23,029 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:23,031 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 3 procedures, 13 locations, 17 edges, 3 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:23,076 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:23,089 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;@60957922, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:23,090 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:23,094 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2025-04-28 21:21:23,103 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2025-04-28 21:21:23,103 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:23,104 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:23,105 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:23,111 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:23,113 INFO  L85        PathProgramCache]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times
[2025-04-28 21:21:23,123 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:23,124 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099825088]
[2025-04-28 21:21:23,124 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:23,125 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:23,163 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes.
[2025-04-28 21:21:23,189 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements.
[2025-04-28 21:21:23,190 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:23,190 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:23,453 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 21:21:23,453 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:23,453 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099825088]
[2025-04-28 21:21:23,454 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099825088] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:23,454 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:23,458 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:23,462 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705465279]
[2025-04-28 21:21:23,463 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:23,466 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:23,466 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:23,491 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:23,492 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:23,494 INFO  L87              Difference]: Start difference. First operand  has 13 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2025-04-28 21:21:23,561 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:23,561 INFO  L93              Difference]: Finished difference Result 13 states and 14 transitions.
[2025-04-28 21:21:23,563 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:23,564 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 9
[2025-04-28 21:21:23,565 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:23,571 INFO  L225             Difference]: With dead ends: 13
[2025-04-28 21:21:23,571 INFO  L226             Difference]: Without dead ends: 13
[2025-04-28 21:21:23,573 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 21:21:23,576 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:23,577 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:23,624 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2025-04-28 21:21:23,647 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2025-04-28 21:21:23,648 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)
[2025-04-28 21:21:23,683 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2025-04-28 21:21:23,685 INFO  L79                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9
[2025-04-28 21:21:23,685 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:23,685 INFO  L485      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2025-04-28 21:21:23,686 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2025-04-28 21:21:23,686 INFO  L278                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2025-04-28 21:21:23,687 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2025-04-28 21:21:23,687 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:23,687 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:23,687 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:23,688 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:23,688 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:23,689 INFO  L85        PathProgramCache]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times
[2025-04-28 21:21:23,689 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:23,689 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555741500]
[2025-04-28 21:21:23,689 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:23,689 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:23,709 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:23,744 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:23,744 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:23,744 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:24,427 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 21:21:24,427 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:24,427 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555741500]
[2025-04-28 21:21:24,428 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555741500] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:24,428 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670703461]
[2025-04-28 21:21:24,428 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:24,428 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:24,432 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:24,437 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 21:21:24,441 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:24,530 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:24,605 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:24,606 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:24,606 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:24,612 INFO  L256         TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:24,619 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:24,831 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 21:21:24,832 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:25,214 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 21:21:25,216 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670703461] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:25,216 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:25,216 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9
[2025-04-28 21:21:25,217 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296781478]
[2025-04-28 21:21:25,217 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:25,218 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2025-04-28 21:21:25,218 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:25,218 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2025-04-28 21:21:25,219 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2025-04-28 21:21:25,219 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 9 states, 5 states have (on average 2.2) internal successors, (11), 8 states have internal predecessors, (11), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:25,352 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:25,352 INFO  L93              Difference]: Finished difference Result 15 states and 16 transitions.
[2025-04-28 21:21:25,353 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:25,354 INFO  L79                 Accepts]: Start accepts. Automaton has  has 9 states, 5 states have (on average 2.2) internal successors, (11), 8 states have internal predecessors, (11), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 13
[2025-04-28 21:21:25,354 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:25,354 INFO  L225             Difference]: With dead ends: 15
[2025-04-28 21:21:25,354 INFO  L226             Difference]: Without dead ends: 15
[2025-04-28 21:21:25,355 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:21:25,356 INFO  L437           NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:25,356 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:25,357 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2025-04-28 21:21:25,361 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2025-04-28 21:21:25,361 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5)
[2025-04-28 21:21:25,361 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2025-04-28 21:21:25,362 INFO  L79                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13
[2025-04-28 21:21:25,362 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:25,362 INFO  L485      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2025-04-28 21:21:25,362 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 5 states have (on average 2.2) internal successors, (11), 8 states have internal predecessors, (11), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:25,362 INFO  L278                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2025-04-28 21:21:25,363 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2025-04-28 21:21:25,363 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:25,363 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:25,367 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:25,563 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:25,564 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:25,564 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:25,564 INFO  L85        PathProgramCache]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times
[2025-04-28 21:21:25,565 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:25,565 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791553846]
[2025-04-28 21:21:25,565 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:25,565 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:25,586 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:25,605 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:25,606 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:25,606 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:26,757 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:26,758 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:26,758 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791553846]
[2025-04-28 21:21:26,758 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791553846] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:26,758 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742227557]
[2025-04-28 21:21:26,758 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:26,758 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:26,761 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:26,763 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 21:21:26,767 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:26,865 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:26,951 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:26,951 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:26,951 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:26,955 INFO  L256         TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:26,958 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:27,682 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:27,683 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:31,494 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:31,494 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742227557] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:31,494 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:31,494 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15
[2025-04-28 21:21:31,495 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263439007]
[2025-04-28 21:21:31,495 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:31,495 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2025-04-28 21:21:31,496 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:31,497 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2025-04-28 21:21:31,498 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210
[2025-04-28 21:21:31,499 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand  has 15 states, 8 states have (on average 2.125) internal successors, (17), 14 states have internal predecessors, (17), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2025-04-28 21:21:32,095 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:32,095 INFO  L93              Difference]: Finished difference Result 19 states and 20 transitions.
[2025-04-28 21:21:32,095 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:21:32,096 INFO  L79                 Accepts]: Start accepts. Automaton has  has 15 states, 8 states have (on average 2.125) internal successors, (17), 14 states have internal predecessors, (17), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) Word has length 17
[2025-04-28 21:21:32,096 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:32,096 INFO  L225             Difference]: With dead ends: 19
[2025-04-28 21:21:32,097 INFO  L226             Difference]: Without dead ends: 19
[2025-04-28 21:21:32,097 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380
[2025-04-28 21:21:32,098 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:32,098 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:32,099 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2025-04-28 21:21:32,101 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2025-04-28 21:21:32,102 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7)
[2025-04-28 21:21:32,102 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions.
[2025-04-28 21:21:32,102 INFO  L79                 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17
[2025-04-28 21:21:32,103 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:32,103 INFO  L485      AbstractCegarLoop]: Abstraction has 19 states and 20 transitions.
[2025-04-28 21:21:32,103 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 8 states have (on average 2.125) internal successors, (17), 14 states have internal predecessors, (17), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2025-04-28 21:21:32,103 INFO  L278                IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions.
[2025-04-28 21:21:32,104 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2025-04-28 21:21:32,104 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:32,104 INFO  L218           NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:32,110 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:21:32,307 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:32,308 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:32,308 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:32,308 INFO  L85        PathProgramCache]: Analyzing trace with hash 1762711629, now seen corresponding path program 3 times
[2025-04-28 21:21:32,308 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:32,309 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304836286]
[2025-04-28 21:21:32,309 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:32,309 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:32,329 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 5 equivalence classes.
[2025-04-28 21:21:32,387 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 25 of 25 statements.
[2025-04-28 21:21:32,388 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2025-04-28 21:21:32,388 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:34,951 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2025-04-28 21:21:34,951 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:34,951 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304836286]
[2025-04-28 21:21:34,952 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304836286] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:34,952 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313405201]
[2025-04-28 21:21:34,952 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:34,952 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:34,955 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:34,957 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 21:21:34,960 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:35,061 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 5 equivalence classes.
[2025-04-28 21:21:35,180 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 25 of 25 statements.
[2025-04-28 21:21:35,180 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2025-04-28 21:21:35,180 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:35,185 INFO  L256         TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 59 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:35,188 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:35,788 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2025-04-28 21:21:35,788 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:48,422 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2025-04-28 21:21:48,422 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313405201] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:48,422 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:48,422 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24
[2025-04-28 21:21:48,423 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392326065]
[2025-04-28 21:21:48,423 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:48,423 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2025-04-28 21:21:48,423 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:48,424 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2025-04-28 21:21:48,424 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552
[2025-04-28 21:21:48,424 INFO  L87              Difference]: Start difference. First operand 19 states and 20 transitions. Second operand  has 24 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 23 states have internal predecessors, (26), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (14), 9 states have call predecessors, (14), 13 states have call successors, (14)
[2025-04-28 21:21:49,201 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:49,201 INFO  L93              Difference]: Finished difference Result 23 states and 24 transitions.
[2025-04-28 21:21:49,202 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2025-04-28 21:21:49,202 INFO  L79                 Accepts]: Start accepts. Automaton has  has 24 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 23 states have internal predecessors, (26), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (14), 9 states have call predecessors, (14), 13 states have call successors, (14) Word has length 25
[2025-04-28 21:21:49,202 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:49,203 INFO  L225             Difference]: With dead ends: 23
[2025-04-28 21:21:49,203 INFO  L226             Difference]: Without dead ends: 23
[2025-04-28 21:21:49,203 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930
[2025-04-28 21:21:49,204 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:49,205 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 85 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:21:49,205 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2025-04-28 21:21:49,208 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2025-04-28 21:21:49,209 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9)
[2025-04-28 21:21:49,209 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions.
[2025-04-28 21:21:49,209 INFO  L79                 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 25
[2025-04-28 21:21:49,209 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:49,210 INFO  L485      AbstractCegarLoop]: Abstraction has 23 states and 24 transitions.
[2025-04-28 21:21:49,210 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 24 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 23 states have internal predecessors, (26), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (14), 9 states have call predecessors, (14), 13 states have call successors, (14)
[2025-04-28 21:21:49,210 INFO  L278                IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions.
[2025-04-28 21:21:49,211 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2025-04-28 21:21:49,211 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:49,211 INFO  L218           NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:49,216 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:49,412 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:49,413 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:49,413 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:49,413 INFO  L85        PathProgramCache]: Analyzing trace with hash -1661294575, now seen corresponding path program 4 times
[2025-04-28 21:21:49,413 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:49,413 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326692065]
[2025-04-28 21:21:49,413 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:49,413 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:49,435 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes.
[2025-04-28 21:21:49,483 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 33 of 33 statements.
[2025-04-28 21:21:49,483 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s)
[2025-04-28 21:21:49,483 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
