./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-041.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:50,782 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:50,890 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc585166-b4b6-4bb8-ba7b-ca01bc0b69c5/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:50,895 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:50,896 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:50,930 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:50,931 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:50,931 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:50,931 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:50,932 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:50,932 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:50,932 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:50,932 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:50,932 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:50,932 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:50,933 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:50,933 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:50,933 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:50,935 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:50,935 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:50,935 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:50,935 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:50,936 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:50,936 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:50,936 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:50,937 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:50,937 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:51,317 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:51,330 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:51,333 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:51,336 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:51,336 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:51,338 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc585166-b4b6-4bb8-ba7b-ca01bc0b69c5/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-041.smt2
[2025-04-28 21:21:51,341 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:51,350 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:51,677 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc585166-b4b6-4bb8-ba7b-ca01bc0b69c5/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-041.smt2
[2025-04-28 21:21:51,681 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:51,682 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:51,683 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:51,684 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:51,684 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:51,687 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,737 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51 Unit
[2025-04-28 21:21:51,737 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:51,740 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:51,740 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:51,740 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:51,761 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,762 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,792 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,792 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,796 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,797 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,799 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,800 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,801 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,816 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:51,818 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:51,818 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:51,818 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:51,819 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (1/1) ...
[2025-04-28 21:21:51,822 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:51,842 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:51,856 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 21:21:51,858 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 21:21:51,870 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:51,870 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:51,870 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:51,870 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure state given in one single declaration
[2025-04-28 21:21:51,870 INFO  L130     BoogieDeclarations]: Found specification of procedure state
[2025-04-28 21:21:51,870 INFO  L138     BoogieDeclarations]: Found implementation of procedure state
[2025-04-28 21:21:51,871 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:51,871 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:51,871 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:51,960 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:51,963 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:52,206 INFO  L?                        ?]: Removed 0 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:52,207 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:52,223 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:52,224 INFO  L312             CfgBuilder]: Removed 0 assume(true) statements.
[2025-04-28 21:21:52,228 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:52 BoogieIcfgContainer
[2025-04-28 21:21:52,228 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:52,231 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:52,235 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:52,240 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:52,240 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:51" (1/3) ...
[2025-04-28 21:21:52,241 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200924db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:52, skipping insertion in model container
[2025-04-28 21:21:52,242 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:51" (2/3) ...
[2025-04-28 21:21:52,242 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200924db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:52, skipping insertion in model container
[2025-04-28 21:21:52,242 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:52" (3/3) ...
[2025-04-28 21:21:52,243 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:52,262 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:52,265 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 21:21:52,320 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:52,339 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;@153d6a6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:52,339 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:52,344 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 21:21:52,352 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2025-04-28 21:21:52,352 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:52,353 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:52,353 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:52,360 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:52,362 INFO  L85        PathProgramCache]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times
[2025-04-28 21:21:52,374 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:52,374 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643588501]
[2025-04-28 21:21:52,377 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:52,378 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:52,433 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes.
[2025-04-28 21:21:52,479 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements.
[2025-04-28 21:21:52,480 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:52,480 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:52,755 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 21:21:52,756 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:52,756 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643588501]
[2025-04-28 21:21:52,757 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643588501] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:52,757 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:52,760 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:52,762 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633313522]
[2025-04-28 21:21:52,763 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:52,767 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:52,767 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:52,798 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:52,798 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:52,802 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 21:21:52,858 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:52,858 INFO  L93              Difference]: Finished difference Result 13 states and 14 transitions.
[2025-04-28 21:21:52,860 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:52,861 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 21:21:52,861 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:52,868 INFO  L225             Difference]: With dead ends: 13
[2025-04-28 21:21:52,869 INFO  L226             Difference]: Without dead ends: 13
[2025-04-28 21:21:52,871 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 21:21:52,875 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 21:21:52,875 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 21:21:52,890 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2025-04-28 21:21:52,911 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2025-04-28 21:21:52,914 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 21:21:52,919 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2025-04-28 21:21:52,920 INFO  L79                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9
[2025-04-28 21:21:52,920 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:52,920 INFO  L485      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2025-04-28 21:21:52,920 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 21:21:52,921 INFO  L278                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2025-04-28 21:21:52,923 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2025-04-28 21:21:52,923 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:52,924 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:52,924 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:52,924 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:52,925 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:52,925 INFO  L85        PathProgramCache]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times
[2025-04-28 21:21:52,925 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:52,925 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141098181]
[2025-04-28 21:21:52,925 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:52,925 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:52,953 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:52,989 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:52,991 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:52,991 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:53,671 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 21:21:53,671 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:53,671 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141098181]
[2025-04-28 21:21:53,671 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141098181] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:53,671 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043785461]
[2025-04-28 21:21:53,672 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:53,672 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:53,675 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:53,677 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 21:21:53,681 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:53,780 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:53,857 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:53,858 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:53,858 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:53,862 INFO  L256         TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:53,877 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:54,131 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 21:21:54,132 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:54,494 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 21:21:54,494 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043785461] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:54,494 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:54,495 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9
[2025-04-28 21:21:54,495 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446104353]
[2025-04-28 21:21:54,495 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:54,496 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2025-04-28 21:21:54,496 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:54,497 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2025-04-28 21:21:54,497 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2025-04-28 21:21:54,497 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 9 states, 5 states have (on average 2.2) internal successors, (11), 8 states have internal predecessors, (11), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:54,624 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:54,624 INFO  L93              Difference]: Finished difference Result 15 states and 16 transitions.
[2025-04-28 21:21:54,626 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2025-04-28 21:21:54,626 INFO  L79                 Accepts]: Start accepts. Automaton has  has 9 states, 5 states have (on average 2.2) internal successors, (11), 8 states have internal predecessors, (11), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 13
[2025-04-28 21:21:54,627 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:54,627 INFO  L225             Difference]: With dead ends: 15
[2025-04-28 21:21:54,627 INFO  L226             Difference]: Without dead ends: 15
[2025-04-28 21:21:54,628 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110
[2025-04-28 21:21:54,628 INFO  L437           NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:54,629 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:54,629 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2025-04-28 21:21:54,636 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2025-04-28 21:21:54,637 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 8 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5)
[2025-04-28 21:21:54,638 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2025-04-28 21:21:54,638 INFO  L79                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13
[2025-04-28 21:21:54,638 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:54,638 INFO  L485      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2025-04-28 21:21:54,639 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 5 states have (on average 2.2) internal successors, (11), 8 states have internal predecessors, (11), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5)
[2025-04-28 21:21:54,639 INFO  L278                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2025-04-28 21:21:54,639 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2025-04-28 21:21:54,639 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:54,639 INFO  L218           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:54,646 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2025-04-28 21:21:54,840 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:54,840 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:54,841 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:54,841 INFO  L85        PathProgramCache]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times
[2025-04-28 21:21:54,841 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:54,841 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170816622]
[2025-04-28 21:21:54,841 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:54,841 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:54,868 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:54,900 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:54,900 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:54,900 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:55,942 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 21:21:55,942 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:55,942 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170816622]
[2025-04-28 21:21:55,942 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170816622] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:55,942 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11527303]
[2025-04-28 21:21:55,943 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:55,943 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:55,947 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:55,949 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 21:21:55,954 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:56,044 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes.
[2025-04-28 21:21:56,132 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements.
[2025-04-28 21:21:56,132 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:56,132 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:56,136 INFO  L256         TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 49 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:56,141 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:56,742 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 21:21:56,743 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:00,391 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 21:22:00,391 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [11527303] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:00,391 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:00,392 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16
[2025-04-28 21:22:00,392 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281134083]
[2025-04-28 21:22:00,392 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:00,392 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2025-04-28 21:22:00,392 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:00,393 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2025-04-28 21:22:00,394 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240
[2025-04-28 21:22:00,394 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand  has 16 states, 9 states have (on average 2.111111111111111) internal successors, (19), 15 states have internal predecessors, (19), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2025-04-28 21:22:00,950 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:00,951 INFO  L93              Difference]: Finished difference Result 19 states and 20 transitions.
[2025-04-28 21:22:00,952 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:22:00,952 INFO  L79                 Accepts]: Start accepts. Automaton has  has 16 states, 9 states have (on average 2.111111111111111) internal successors, (19), 15 states have internal predecessors, (19), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) Word has length 17
[2025-04-28 21:22:00,953 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:00,954 INFO  L225             Difference]: With dead ends: 19
[2025-04-28 21:22:00,954 INFO  L226             Difference]: Without dead ends: 19
[2025-04-28 21:22:00,955 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420
[2025-04-28 21:22:00,957 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:00,957 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:22:00,959 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2025-04-28 21:22:00,965 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2025-04-28 21:22:00,965 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 19 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7)
[2025-04-28 21:22:00,966 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions.
[2025-04-28 21:22:00,966 INFO  L79                 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17
[2025-04-28 21:22:00,966 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:00,966 INFO  L485      AbstractCegarLoop]: Abstraction has 19 states and 20 transitions.
[2025-04-28 21:22:00,966 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 9 states have (on average 2.111111111111111) internal successors, (19), 15 states have internal predecessors, (19), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8)
[2025-04-28 21:22:00,967 INFO  L278                IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions.
[2025-04-28 21:22:00,967 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2025-04-28 21:22:00,967 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:00,967 INFO  L218           NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:00,974 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:22:01,168 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:01,168 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:01,168 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:01,169 INFO  L85        PathProgramCache]: Analyzing trace with hash 1762711629, now seen corresponding path program 3 times
[2025-04-28 21:22:01,169 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:01,169 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170519436]
[2025-04-28 21:22:01,169 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:22:01,169 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:01,190 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 5 equivalence classes.
[2025-04-28 21:22:01,265 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 25 of 25 statements.
[2025-04-28 21:22:01,266 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2025-04-28 21:22:01,267 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:04,719 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 21:22:04,720 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:04,720 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170519436]
[2025-04-28 21:22:04,720 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170519436] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:04,720 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028532279]
[2025-04-28 21:22:04,720 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:22:04,720 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:04,723 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:04,725 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 21:22:04,728 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:22:04,825 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 5 equivalence classes.
[2025-04-28 21:22:04,937 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 25 of 25 statements.
[2025-04-28 21:22:04,937 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2025-04-28 21:22:04,937 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:04,941 INFO  L256         TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 39 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:04,944 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:05,428 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 21:22:05,428 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:14,755 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 21:22:14,755 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028532279] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:14,755 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:14,755 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23
[2025-04-28 21:22:14,755 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421305569]
[2025-04-28 21:22:14,755 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:14,756 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2025-04-28 21:22:14,756 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:14,757 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2025-04-28 21:22:14,757 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506
[2025-04-28 21:22:14,757 INFO  L87              Difference]: Start difference. First operand 19 states and 20 transitions. Second operand  has 23 states, 10 states have (on average 2.5) internal successors, (25), 22 states have internal predecessors, (25), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (14), 7 states have call predecessors, (14), 14 states have call successors, (14)
[2025-04-28 21:22:15,592 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:15,592 INFO  L93              Difference]: Finished difference Result 21 states and 22 transitions.
[2025-04-28 21:22:15,593 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2025-04-28 21:22:15,593 INFO  L79                 Accepts]: Start accepts. Automaton has  has 23 states, 10 states have (on average 2.5) internal successors, (25), 22 states have internal predecessors, (25), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (14), 7 states have call predecessors, (14), 14 states have call successors, (14) Word has length 25
[2025-04-28 21:22:15,593 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:15,594 INFO  L225             Difference]: With dead ends: 21
[2025-04-28 21:22:15,594 INFO  L226             Difference]: Without dead ends: 21
[2025-04-28 21:22:15,594 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812
[2025-04-28 21:22:15,595 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:15,595 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 72 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:22:15,596 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2025-04-28 21:22:15,599 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2025-04-28 21:22:15,599 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8)
[2025-04-28 21:22:15,600 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2025-04-28 21:22:15,600 INFO  L79                 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25
[2025-04-28 21:22:15,600 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:15,600 INFO  L485      AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2025-04-28 21:22:15,600 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 23 states, 10 states have (on average 2.5) internal successors, (25), 22 states have internal predecessors, (25), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (14), 7 states have call predecessors, (14), 14 states have call successors, (14)
[2025-04-28 21:22:15,600 INFO  L278                IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2025-04-28 21:22:15,601 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2025-04-28 21:22:15,601 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:15,601 INFO  L218           NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:15,607 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2025-04-28 21:22:15,801 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:15,802 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:15,802 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:15,802 INFO  L85        PathProgramCache]: Analyzing trace with hash 853117551, now seen corresponding path program 4 times
[2025-04-28 21:22:15,802 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:15,802 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721611592]
[2025-04-28 21:22:15,802 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:22:15,802 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:15,822 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes.
[2025-04-28 21:22:15,851 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 29 of 29 statements.
[2025-04-28 21:22:15,852 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s)
[2025-04-28 21:22:15,852 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:19,941 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2025-04-28 21:22:19,941 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:19,941 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721611592]
[2025-04-28 21:22:19,942 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721611592] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:19,942 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271104633]
[2025-04-28 21:22:19,942 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:22:19,942 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:19,946 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:19,948 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 21:22:19,952 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2025-04-28 21:22:20,108 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes.
[2025-04-28 21:22:20,252 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 29 of 29 statements.
[2025-04-28 21:22:20,252 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s)
[2025-04-28 21:22:20,252 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:20,258 INFO  L256         TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 55 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:20,266 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:20,749 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2025-04-28 21:22:20,749 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
