./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-088.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:29,853 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:29,920 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38ac5c3-83eb-4397-bcc5-d287c54ea683/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:29,925 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:29,926 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:29,952 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:29,952 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:29,953 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:29,953 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:29,953 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:29,954 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:29,954 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:29,954 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:29,954 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:29,954 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:29,954 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:29,954 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:29,955 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:29,955 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:29,955 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:29,955 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:29,955 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:29,955 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:29,955 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:29,956 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:29,956 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:29,956 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:30,329 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:30,341 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:30,344 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:30,347 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:30,348 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:30,349 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38ac5c3-83eb-4397-bcc5-d287c54ea683/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-088.smt2
[2025-04-28 21:21:30,354 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:30,357 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:30,523 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38ac5c3-83eb-4397-bcc5-d287c54ea683/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-088.smt2
[2025-04-28 21:21:30,527 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:30,529 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:30,530 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:30,530 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:30,530 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:30,533 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,557 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30 Unit
[2025-04-28 21:21:30,557 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:30,558 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:30,558 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:30,558 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:30,569 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,569 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,589 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,589 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,591 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,591 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,593 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,594 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,594 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,603 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:30,604 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:30,604 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:30,605 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:30,606 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (1/1) ...
[2025-04-28 21:21:30,608 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:30,620 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:30,633 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 21:21:30,638 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 21:21:30,648 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:30,648 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:30,649 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:30,649 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure inv given in one single declaration
[2025-04-28 21:21:30,649 INFO  L130     BoogieDeclarations]: Found specification of procedure inv
[2025-04-28 21:21:30,649 INFO  L138     BoogieDeclarations]: Found implementation of procedure inv
[2025-04-28 21:21:30,649 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:30,649 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:30,649 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:30,696 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:30,698 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:30,752 INFO  L?                        ?]: Removed 0 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:30,753 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:30,761 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:30,761 INFO  L312             CfgBuilder]: Removed 0 assume(true) statements.
[2025-04-28 21:21:30,761 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:30 BoogieIcfgContainer
[2025-04-28 21:21:30,762 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:30,764 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:30,764 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:30,768 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:30,768 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:30" (1/3) ...
[2025-04-28 21:21:30,768 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e95e7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:30, skipping insertion in model container
[2025-04-28 21:21:30,769 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:30" (2/3) ...
[2025-04-28 21:21:30,769 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e95e7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:30, skipping insertion in model container
[2025-04-28 21:21:30,769 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:30" (3/3) ...
[2025-04-28 21:21:30,770 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:30,785 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:30,787 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 21:21:30,828 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:30,840 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;@2b2573e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:30,840 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:30,844 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 21:21:30,851 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2025-04-28 21:21:30,851 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:30,852 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:30,852 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:30,857 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:30,857 INFO  L85        PathProgramCache]: Analyzing trace with hash -1672547219, now seen corresponding path program 1 times
[2025-04-28 21:21:30,865 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:30,865 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941519946]
[2025-04-28 21:21:30,865 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:30,866 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:30,889 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes.
[2025-04-28 21:21:30,902 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements.
[2025-04-28 21:21:30,903 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:30,903 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,016 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 21:21:31,016 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:31,016 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941519946]
[2025-04-28 21:21:31,017 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941519946] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:31,017 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:31,020 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:31,022 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260316016]
[2025-04-28 21:21:31,022 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:31,026 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:31,028 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:31,056 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:31,057 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:31,058 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 21:21:31,094 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:31,094 INFO  L93              Difference]: Finished difference Result 13 states and 14 transitions.
[2025-04-28 21:21:31,096 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:31,097 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 21:21:31,097 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:31,104 INFO  L225             Difference]: With dead ends: 13
[2025-04-28 21:21:31,104 INFO  L226             Difference]: Without dead ends: 13
[2025-04-28 21:21:31,107 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 21:21:31,112 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 21:21:31,113 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 21:21:31,128 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2025-04-28 21:21:31,151 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2025-04-28 21:21:31,152 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 21:21:31,158 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2025-04-28 21:21:31,159 INFO  L79                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9
[2025-04-28 21:21:31,160 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:31,160 INFO  L485      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2025-04-28 21:21:31,160 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 21:21:31,161 INFO  L278                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2025-04-28 21:21:31,162 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2025-04-28 21:21:31,162 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:31,163 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:31,163 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:31,163 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:31,164 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:31,164 INFO  L85        PathProgramCache]: Analyzing trace with hash 13498287, now seen corresponding path program 1 times
[2025-04-28 21:21:31,164 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:31,164 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391280380]
[2025-04-28 21:21:31,164 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:31,164 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:31,170 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:31,180 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:31,180 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:31,181 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,351 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 21:21:31,352 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:31,352 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391280380]
[2025-04-28 21:21:31,352 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391280380] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:31,352 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340329263]
[2025-04-28 21:21:31,352 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:31,352 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:31,355 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:31,357 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 21:21:31,360 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:31,392 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:31,403 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:31,403 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:31,403 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:31,406 INFO  L256         TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:31,410 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:31,533 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 21:21:31,533 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:31,935 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 21:21:31,935 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [340329263] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:31,935 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:31,935 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8
[2025-04-28 21:21:31,936 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148000655]
[2025-04-28 21:21:31,937 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:31,937 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2025-04-28 21:21:31,937 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:31,938 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2025-04-28 21:21:31,939 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2025-04-28 21:21:31,940 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 8 states, 4 states have (on average 2.25) internal successors, (9), 7 states have internal predecessors, (9), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:32,046 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:32,047 INFO  L93              Difference]: Finished difference Result 19 states and 22 transitions.
[2025-04-28 21:21:32,047 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:32,048 INFO  L79                 Accepts]: Start accepts. Automaton has  has 8 states, 4 states have (on average 2.25) internal successors, (9), 7 states have internal predecessors, (9), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 13
[2025-04-28 21:21:32,048 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:32,048 INFO  L225             Difference]: With dead ends: 19
[2025-04-28 21:21:32,049 INFO  L226             Difference]: Without dead ends: 19
[2025-04-28 21:21:32,049 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2025-04-28 21:21:32,050 INFO  L437           NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:32,051 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:32,052 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2025-04-28 21:21:32,055 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17.
[2025-04-28 21:21:32,055 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5)
[2025-04-28 21:21:32,056 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions.
[2025-04-28 21:21:32,056 INFO  L79                 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13
[2025-04-28 21:21:32,056 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:32,056 INFO  L485      AbstractCegarLoop]: Abstraction has 17 states and 19 transitions.
[2025-04-28 21:21:32,057 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 4 states have (on average 2.25) internal successors, (9), 7 states have internal predecessors, (9), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:32,057 INFO  L278                IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions.
[2025-04-28 21:21:32,057 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2025-04-28 21:21:32,058 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:32,058 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:32,064 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:32,258 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:32,259 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:32,259 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:32,260 INFO  L85        PathProgramCache]: Analyzing trace with hash -1177266959, now seen corresponding path program 2 times
[2025-04-28 21:21:32,260 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:32,260 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827302685]
[2025-04-28 21:21:32,260 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:32,260 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:32,266 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:32,276 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:32,276 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:32,276 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:32,444 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 21:21:32,445 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:32,445 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827302685]
[2025-04-28 21:21:32,445 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827302685] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:32,445 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040671590]
[2025-04-28 21:21:32,445 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:32,445 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:32,450 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:32,452 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 21:21:32,456 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:32,489 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:32,502 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:32,502 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:32,502 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:32,503 INFO  L256         TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:32,504 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:32,551 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 21:21:32,551 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:33,053 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 21:21:33,053 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040671590] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:33,053 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:33,054 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11
[2025-04-28 21:21:33,054 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005060646]
[2025-04-28 21:21:33,054 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:33,054 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2025-04-28 21:21:33,054 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:33,055 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2025-04-28 21:21:33,055 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:21:33,056 INFO  L87              Difference]: Start difference. First operand 17 states and 19 transitions. Second operand  has 11 states, 5 states have (on average 2.4) internal successors, (12), 10 states have internal predecessors, (12), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7)
[2025-04-28 21:21:33,217 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:33,217 INFO  L93              Difference]: Finished difference Result 27 states and 31 transitions.
[2025-04-28 21:21:33,217 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2025-04-28 21:21:33,218 INFO  L79                 Accepts]: Start accepts. Automaton has  has 11 states, 5 states have (on average 2.4) internal successors, (12), 10 states have internal predecessors, (12), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 17
[2025-04-28 21:21:33,218 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:33,219 INFO  L225             Difference]: With dead ends: 27
[2025-04-28 21:21:33,219 INFO  L226             Difference]: Without dead ends: 25
[2025-04-28 21:21:33,219 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240
[2025-04-28 21:21:33,220 INFO  L437           NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:33,220 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:33,221 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2025-04-28 21:21:33,225 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23.
[2025-04-28 21:21:33,225 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8)
[2025-04-28 21:21:33,226 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions.
[2025-04-28 21:21:33,226 INFO  L79                 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 17
[2025-04-28 21:21:33,226 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:33,226 INFO  L485      AbstractCegarLoop]: Abstraction has 23 states and 27 transitions.
[2025-04-28 21:21:33,226 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 5 states have (on average 2.4) internal successors, (12), 10 states have internal predecessors, (12), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7)
[2025-04-28 21:21:33,227 INFO  L278                IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions.
[2025-04-28 21:21:33,227 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:33,227 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:33,227 INFO  L218           NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:33,234 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:33,431 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:33,432 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:33,432 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:33,432 INFO  L85        PathProgramCache]: Analyzing trace with hash 329141299, now seen corresponding path program 3 times
[2025-04-28 21:21:33,432 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:33,432 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930345743]
[2025-04-28 21:21:33,433 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:33,433 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:33,438 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes.
[2025-04-28 21:21:33,451 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:33,452 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:33,452 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:33,648 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2025-04-28 21:21:33,648 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:33,649 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930345743]
[2025-04-28 21:21:33,649 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930345743] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:33,649 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888938155]
[2025-04-28 21:21:33,649 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:33,649 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:33,654 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:33,657 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 21:21:33,662 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:33,700 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 4 equivalence classes.
[2025-04-28 21:21:33,717 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:33,717 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2025-04-28 21:21:33,717 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:33,718 INFO  L256         TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:33,720 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:33,793 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2025-04-28 21:21:33,793 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:34,566 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:34,566 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [888938155] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:34,566 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:34,566 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 13
[2025-04-28 21:21:34,566 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997017948]
[2025-04-28 21:21:34,567 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:34,567 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2025-04-28 21:21:34,567 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:34,568 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2025-04-28 21:21:34,568 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156
[2025-04-28 21:21:34,568 INFO  L87              Difference]: Start difference. First operand 23 states and 27 transitions. Second operand  has 13 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 12 states have internal predecessors, (14), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9)
[2025-04-28 21:21:34,731 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:34,732 INFO  L93              Difference]: Finished difference Result 33 states and 41 transitions.
[2025-04-28 21:21:34,732 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2025-04-28 21:21:34,732 INFO  L79                 Accepts]: Start accepts. Automaton has  has 13 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 12 states have internal predecessors, (14), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) Word has length 21
[2025-04-28 21:21:34,732 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:34,733 INFO  L225             Difference]: With dead ends: 33
[2025-04-28 21:21:34,733 INFO  L226             Difference]: Without dead ends: 27
[2025-04-28 21:21:34,733 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306
[2025-04-28 21:21:34,734 INFO  L437           NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:34,735 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 62 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:34,738 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2025-04-28 21:21:34,743 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25.
[2025-04-28 21:21:34,744 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8)
[2025-04-28 21:21:34,745 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions.
[2025-04-28 21:21:34,745 INFO  L79                 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21
[2025-04-28 21:21:34,745 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:34,745 INFO  L485      AbstractCegarLoop]: Abstraction has 25 states and 28 transitions.
[2025-04-28 21:21:34,746 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 12 states have internal predecessors, (14), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9)
[2025-04-28 21:21:34,746 INFO  L278                IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions.
[2025-04-28 21:21:34,747 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2025-04-28 21:21:34,748 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:34,748 INFO  L218           NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:34,753 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:34,952 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:34,954 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:34,955 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:34,955 INFO  L85        PathProgramCache]: Analyzing trace with hash 1761090933, now seen corresponding path program 4 times
[2025-04-28 21:21:34,955 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:34,955 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115220979]
[2025-04-28 21:21:34,955 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:34,955 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:34,964 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes.
[2025-04-28 21:21:34,988 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements.
[2025-04-28 21:21:34,988 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s)
[2025-04-28 21:21:34,989 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:35,198 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2025-04-28 21:21:35,198 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:35,198 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115220979]
[2025-04-28 21:21:35,198 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115220979] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:35,198 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858425107]
[2025-04-28 21:21:35,198 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:21:35,198 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:35,201 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:35,203 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:35,207 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2025-04-28 21:21:35,244 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes.
[2025-04-28 21:21:35,258 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements.
[2025-04-28 21:21:35,258 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s)
[2025-04-28 21:21:35,258 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:35,259 INFO  L256         TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:35,261 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:35,327 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2025-04-28 21:21:35,327 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:36,554 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 21:21:36,555 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [858425107] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:36,555 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:36,555 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 15
[2025-04-28 21:21:36,555 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194733580]
[2025-04-28 21:21:36,556 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:36,556 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2025-04-28 21:21:36,556 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:36,557 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2025-04-28 21:21:36,557 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210
[2025-04-28 21:21:36,557 INFO  L87              Difference]: Start difference. First operand 25 states and 28 transitions. Second operand  has 15 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 14 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11)
[2025-04-28 21:21:36,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:36,752 INFO  L93              Difference]: Finished difference Result 33 states and 38 transitions.
[2025-04-28 21:21:36,756 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2025-04-28 21:21:36,756 INFO  L79                 Accepts]: Start accepts. Automaton has  has 15 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 14 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11) Word has length 25
[2025-04-28 21:21:36,756 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:36,757 INFO  L225             Difference]: With dead ends: 33
[2025-04-28 21:21:36,757 INFO  L226             Difference]: Without dead ends: 31
[2025-04-28 21:21:36,758 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462
[2025-04-28 21:21:36,758 INFO  L437           NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:36,759 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:36,763 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2025-04-28 21:21:36,769 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29.
[2025-04-28 21:21:36,770 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 29 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 5 states have call predecessors, (6), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10)
[2025-04-28 21:21:36,771 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions.
[2025-04-28 21:21:36,771 INFO  L79                 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25
[2025-04-28 21:21:36,771 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:36,771 INFO  L485      AbstractCegarLoop]: Abstraction has 29 states and 32 transitions.
[2025-04-28 21:21:36,772 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 14 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11)
[2025-04-28 21:21:36,772 INFO  L278                IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions.
[2025-04-28 21:21:36,773 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2025-04-28 21:21:36,774 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:36,774 INFO  L218           NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:36,780 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2025-04-28 21:21:36,974 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2025-04-28 21:21:36,974 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:36,975 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:36,975 INFO  L85        PathProgramCache]: Analyzing trace with hash -2107879943, now seen corresponding path program 5 times
[2025-04-28 21:21:36,975 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:36,975 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269889098]
[2025-04-28 21:21:36,975 INFO  L95    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2025-04-28 21:21:36,975 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:36,981 INFO  L108    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 7 equivalence classes.
[2025-04-28 21:21:37,022 INFO  L111    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 33 of 33 statements.
[2025-04-28 21:21:37,022 INFO  L114    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s)
[2025-04-28 21:21:37,022 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:37,203 INFO  L134       CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2025-04-28 21:21:37,203 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:37,203 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269889098]
[2025-04-28 21:21:37,203 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269889098] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:37,204 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276275039]
[2025-04-28 21:21:37,204 INFO  L95    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2025-04-28 21:21:37,204 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:37,207 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:37,209 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:37,214 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2025-04-28 21:21:37,261 INFO  L108    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 33 statements into 7 equivalence classes.
[2025-04-28 21:21:37,282 INFO  L111    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 33 of 33 statements.
[2025-04-28 21:21:37,282 INFO  L114    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s)
[2025-04-28 21:21:37,282 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:37,283 INFO  L256         TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:37,286 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:37,354 INFO  L134       CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2025-04-28 21:21:37,354 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:39,743 INFO  L134       CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked.
[2025-04-28 21:21:39,744 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [276275039] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:39,744 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:39,744 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 19
[2025-04-28 21:21:39,744 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180204421]
[2025-04-28 21:21:39,744 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:39,744 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 19 states
[2025-04-28 21:21:39,744 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:39,745 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2025-04-28 21:21:39,745 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342
[2025-04-28 21:21:39,745 INFO  L87              Difference]: Start difference. First operand 29 states and 32 transitions. Second operand  has 19 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 18 states have internal predecessors, (20), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 7 states have call predecessors, (15), 11 states have call successors, (15)
[2025-04-28 21:21:39,926 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:39,926 INFO  L93              Difference]: Finished difference Result 37 states and 42 transitions.
[2025-04-28 21:21:39,927 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2025-04-28 21:21:39,927 INFO  L79                 Accepts]: Start accepts. Automaton has  has 19 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 18 states have internal predecessors, (20), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 7 states have call predecessors, (15), 11 states have call successors, (15) Word has length 33
[2025-04-28 21:21:39,927 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:39,928 INFO  L225             Difference]: With dead ends: 37
[2025-04-28 21:21:39,928 INFO  L226             Difference]: Without dead ends: 35
[2025-04-28 21:21:39,928 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756
[2025-04-28 21:21:39,929 INFO  L437           NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:39,929 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 70 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:39,930 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2025-04-28 21:21:39,934 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33.
[2025-04-28 21:21:39,934 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 33 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 5 states have call predecessors, (6), 10 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12)
[2025-04-28 21:21:39,935 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions.
[2025-04-28 21:21:39,935 INFO  L79                 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 33
[2025-04-28 21:21:39,935 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:39,935 INFO  L485      AbstractCegarLoop]: Abstraction has 33 states and 36 transitions.
[2025-04-28 21:21:39,935 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 19 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 18 states have internal predecessors, (20), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 7 states have call predecessors, (15), 11 states have call successors, (15)
[2025-04-28 21:21:39,935 INFO  L278                IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions.
[2025-04-28 21:21:39,936 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2025-04-28 21:21:39,936 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:39,936 INFO  L218           NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:39,943 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2025-04-28 21:21:40,137 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:40,137 INFO  L403      AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:40,137 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:40,138 INFO  L85        PathProgramCache]: Analyzing trace with hash 1201858173, now seen corresponding path program 6 times
[2025-04-28 21:21:40,138 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:40,138 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379813657]
[2025-04-28 21:21:40,138 INFO  L95    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2025-04-28 21:21:40,138 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:40,143 INFO  L108    AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 9 equivalence classes.
[2025-04-28 21:21:40,190 INFO  L111    AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 41 of 41 statements.
[2025-04-28 21:21:40,190 INFO  L114    AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s)
[2025-04-28 21:21:40,190 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:40,543 INFO  L134       CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2025-04-28 21:21:40,543 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:40,543 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379813657]
[2025-04-28 21:21:40,544 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379813657] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:40,544 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126834489]
[2025-04-28 21:21:40,544 INFO  L95    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
[2025-04-28 21:21:40,544 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:40,547 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:40,549 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:40,553 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2025-04-28 21:21:40,644 INFO  L108    AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 9 equivalence classes.
[2025-04-28 21:21:40,671 INFO  L111    AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 41 of 41 statements.
[2025-04-28 21:21:40,671 INFO  L114    AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s)
[2025-04-28 21:21:40,671 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:40,673 INFO  L256         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:40,675 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:40,766 INFO  L134       CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2025-04-28 21:21:40,766 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:45,019 INFO  L134       CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked.
[2025-04-28 21:21:45,019 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126834489] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:45,019 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:45,019 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 23
[2025-04-28 21:21:45,020 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077122449]
[2025-04-28 21:21:45,020 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:45,020 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2025-04-28 21:21:45,020 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:45,021 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2025-04-28 21:21:45,021 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506
[2025-04-28 21:21:45,022 INFO  L87              Difference]: Start difference. First operand 33 states and 36 transitions. Second operand  has 23 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 22 states have internal predecessors, (24), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 9 states have call predecessors, (19), 13 states have call successors, (19)
[2025-04-28 21:21:45,257 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:45,257 INFO  L93              Difference]: Finished difference Result 41 states and 46 transitions.
[2025-04-28 21:21:45,258 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2025-04-28 21:21:45,258 INFO  L79                 Accepts]: Start accepts. Automaton has  has 23 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 22 states have internal predecessors, (24), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 9 states have call predecessors, (19), 13 states have call successors, (19) Word has length 41
[2025-04-28 21:21:45,258 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:45,259 INFO  L225             Difference]: With dead ends: 41
[2025-04-28 21:21:45,259 INFO  L226             Difference]: Without dead ends: 39
[2025-04-28 21:21:45,260 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122
[2025-04-28 21:21:45,261 INFO  L437           NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:45,261 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 72 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:45,261 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2025-04-28 21:21:45,266 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37.
[2025-04-28 21:21:45,266 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 37 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 12 states have return successors, (14), 12 states have call predecessors, (14), 6 states have call successors, (14)
[2025-04-28 21:21:45,267 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions.
[2025-04-28 21:21:45,267 INFO  L79                 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 41
[2025-04-28 21:21:45,267 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:45,267 INFO  L485      AbstractCegarLoop]: Abstraction has 37 states and 40 transitions.
[2025-04-28 21:21:45,267 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 23 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 22 states have internal predecessors, (24), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 9 states have call predecessors, (19), 13 states have call successors, (19)
[2025-04-28 21:21:45,268 INFO  L278                IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions.
[2025-04-28 21:21:45,269 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2025-04-28 21:21:45,269 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:45,269 INFO  L218           NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:45,278 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:45,472 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:45,473 INFO  L403      AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:45,473 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:45,473 INFO  L85        PathProgramCache]: Analyzing trace with hash -479336703, now seen corresponding path program 7 times
[2025-04-28 21:21:45,473 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:45,473 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835360608]
[2025-04-28 21:21:45,473 INFO  L95    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2025-04-28 21:21:45,473 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:45,479 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes.
[2025-04-28 21:21:45,486 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements.
[2025-04-28 21:21:45,486 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:45,486 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:45,811 INFO  L134       CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked.
[2025-04-28 21:21:45,811 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:45,811 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835360608]
[2025-04-28 21:21:45,811 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835360608] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:45,811 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943528799]
[2025-04-28 21:21:45,811 INFO  L95    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2025-04-28 21:21:45,812 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:45,814 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:45,817 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:45,821 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2025-04-28 21:21:45,938 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes.
[2025-04-28 21:21:45,959 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements.
[2025-04-28 21:21:45,959 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:45,959 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:45,960 INFO  L256         TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:45,964 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:46,043 INFO  L134       CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked.
[2025-04-28 21:21:46,045 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:53,411 INFO  L134       CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked.
[2025-04-28 21:21:53,411 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [943528799] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:53,411 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:53,411 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 24] total 27
[2025-04-28 21:21:53,412 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94573430]
[2025-04-28 21:21:53,412 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:53,412 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2025-04-28 21:21:53,412 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:53,413 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2025-04-28 21:21:53,414 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702
[2025-04-28 21:21:53,414 INFO  L87              Difference]: Start difference. First operand 37 states and 40 transitions. Second operand  has 27 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 26 states have internal predecessors, (28), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23)
[2025-04-28 21:21:53,691 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:53,691 INFO  L93              Difference]: Finished difference Result 45 states and 50 transitions.
[2025-04-28 21:21:53,693 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2025-04-28 21:21:53,693 INFO  L79                 Accepts]: Start accepts. Automaton has  has 27 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 26 states have internal predecessors, (28), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) Word has length 49
[2025-04-28 21:21:53,693 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:53,694 INFO  L225             Difference]: With dead ends: 45
[2025-04-28 21:21:53,694 INFO  L226             Difference]: Without dead ends: 43
[2025-04-28 21:21:53,695 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 84 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=446, Invalid=1114, Unknown=0, NotChecked=0, Total=1560
[2025-04-28 21:21:53,697 INFO  L437           NwaCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:53,697 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:53,698 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2025-04-28 21:21:53,703 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41.
[2025-04-28 21:21:53,703 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 41 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 14 states have return successors, (16), 14 states have call predecessors, (16), 6 states have call successors, (16)
[2025-04-28 21:21:53,704 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions.
[2025-04-28 21:21:53,704 INFO  L79                 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 49
[2025-04-28 21:21:53,704 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:53,704 INFO  L485      AbstractCegarLoop]: Abstraction has 41 states and 44 transitions.
[2025-04-28 21:21:53,704 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 27 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 26 states have internal predecessors, (28), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23)
[2025-04-28 21:21:53,705 INFO  L278                IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions.
[2025-04-28 21:21:53,706 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2025-04-28 21:21:53,706 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:53,706 INFO  L218           NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:53,712 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0
[2025-04-28 21:21:53,909 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2025-04-28 21:21:53,910 INFO  L403      AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:53,912 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:53,912 INFO  L85        PathProgramCache]: Analyzing trace with hash -379629691, now seen corresponding path program 8 times
[2025-04-28 21:21:53,913 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:53,913 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609187690]
[2025-04-28 21:21:53,913 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:53,913 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:53,922 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 57 statements into 2 equivalence classes.
[2025-04-28 21:21:53,932 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 57 of 57 statements.
[2025-04-28 21:21:53,932 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:53,932 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:54,382 INFO  L134       CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked.
[2025-04-28 21:21:54,382 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:54,382 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609187690]
[2025-04-28 21:21:54,382 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609187690] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:54,382 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604116809]
[2025-04-28 21:21:54,382 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:54,382 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:54,385 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:54,387 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:54,390 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2025-04-28 21:21:54,606 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 57 statements into 2 equivalence classes.
[2025-04-28 21:21:54,631 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 57 of 57 statements.
[2025-04-28 21:21:54,631 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:54,631 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:54,633 INFO  L256         TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:54,635 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:54,729 INFO  L134       CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked.
[2025-04-28 21:21:54,730 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
