./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-091.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:49,083 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:49,151 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cced22c-40de-4eaf-b257-9ed3b08523da/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:49,158 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:49,161 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:49,196 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:49,197 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:49,198 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:49,198 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:49,198 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:49,200 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:49,200 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:49,200 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:49,200 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:49,200 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:49,200 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:49,200 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:49,201 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:49,201 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:49,201 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:49,201 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:49,202 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:49,202 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:49,202 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:49,202 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:49,203 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:49,203 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:49,520 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:49,530 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:49,534 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:49,537 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:49,537 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:49,539 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cced22c-40de-4eaf-b257-9ed3b08523da/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-091.smt2
[2025-04-28 21:21:49,541 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:49,545 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:49,713 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cced22c-40de-4eaf-b257-9ed3b08523da/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Lin/chc-comp24-LIA-Lin-091.smt2
[2025-04-28 21:21:49,716 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:49,718 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:49,719 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:49,719 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:49,719 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:49,726 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,748 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49 Unit
[2025-04-28 21:21:49,749 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:49,751 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:49,752 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:49,752 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:49,768 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,768 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,791 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,791 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,793 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,795 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,797 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,798 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,798 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,813 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:49,815 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:49,815 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:49,816 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:49,817 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (1/1) ...
[2025-04-28 21:21:49,820 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:49,836 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:49,849 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 21:21:49,852 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 21:21:49,866 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:49,866 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:49,866 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:49,866 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure inv given in one single declaration
[2025-04-28 21:21:49,866 INFO  L130     BoogieDeclarations]: Found specification of procedure inv
[2025-04-28 21:21:49,866 INFO  L138     BoogieDeclarations]: Found implementation of procedure inv
[2025-04-28 21:21:49,866 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:49,866 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:49,866 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:49,900 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:49,902 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:49,971 INFO  L?                        ?]: Removed 0 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:49,971 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:49,985 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:49,985 INFO  L312             CfgBuilder]: Removed 0 assume(true) statements.
[2025-04-28 21:21:49,986 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:49 BoogieIcfgContainer
[2025-04-28 21:21:49,987 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:49,989 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:49,989 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:49,995 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:49,995 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:49" (1/3) ...
[2025-04-28 21:21:49,996 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e45f9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:49, skipping insertion in model container
[2025-04-28 21:21:49,996 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:49" (2/3) ...
[2025-04-28 21:21:49,996 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e45f9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:49, skipping insertion in model container
[2025-04-28 21:21:49,996 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:49" (3/3) ...
[2025-04-28 21:21:49,998 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:50,016 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:50,021 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 21:21:50,065 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:50,082 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;@73d4c44a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:50,082 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:50,087 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 21:21:50,096 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2025-04-28 21:21:50,096 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:50,098 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:50,098 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:50,105 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:50,106 INFO  L85        PathProgramCache]: Analyzing trace with hash -1586659766, now seen corresponding path program 1 times
[2025-04-28 21:21:50,114 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:50,114 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123581708]
[2025-04-28 21:21:50,115 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:50,116 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:50,138 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes.
[2025-04-28 21:21:50,151 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements.
[2025-04-28 21:21:50,151 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:50,151 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:50,244 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 21:21:50,244 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:50,244 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123581708]
[2025-04-28 21:21:50,245 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123581708] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:50,245 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:50,251 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:50,253 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388648230]
[2025-04-28 21:21:50,253 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:50,257 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:50,258 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:50,287 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:50,287 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:50,289 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 21:21:50,333 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:50,333 INFO  L93              Difference]: Finished difference Result 13 states and 14 transitions.
[2025-04-28 21:21:50,334 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:50,336 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 21:21:50,336 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:50,343 INFO  L225             Difference]: With dead ends: 13
[2025-04-28 21:21:50,343 INFO  L226             Difference]: Without dead ends: 13
[2025-04-28 21:21:50,345 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 21:21:50,349 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 21:21:50,350 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 21:21:50,367 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2025-04-28 21:21:50,384 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2025-04-28 21:21:50,385 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 21:21:50,388 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2025-04-28 21:21:50,390 INFO  L79                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9
[2025-04-28 21:21:50,390 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:50,390 INFO  L485      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2025-04-28 21:21:50,390 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 21:21:50,391 INFO  L278                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2025-04-28 21:21:50,392 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2025-04-28 21:21:50,392 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:50,393 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:50,393 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:50,393 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:50,394 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:50,394 INFO  L85        PathProgramCache]: Analyzing trace with hash 1339989006, now seen corresponding path program 1 times
[2025-04-28 21:21:50,394 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:50,394 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237515724]
[2025-04-28 21:21:50,394 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:50,395 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:50,406 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:50,424 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:50,424 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:50,424 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:50,587 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 21:21:50,587 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:50,587 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237515724]
[2025-04-28 21:21:50,588 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237515724] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:50,588 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981553213]
[2025-04-28 21:21:50,588 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:50,588 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:50,591 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:50,595 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 21:21:50,597 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:50,629 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes.
[2025-04-28 21:21:50,649 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements.
[2025-04-28 21:21:50,649 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:50,650 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:50,655 INFO  L256         TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:50,659 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:50,938 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 21:21:50,938 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:51,473 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 21:21:51,474 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [981553213] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:51,474 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:51,474 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10
[2025-04-28 21:21:51,475 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425437336]
[2025-04-28 21:21:51,475 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:51,475 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2025-04-28 21:21:51,475 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:51,476 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2025-04-28 21:21:51,476 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2025-04-28 21:21:51,478 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 10 states, 5 states have (on average 2.2) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 6 states have call successors, (7)
[2025-04-28 21:21:51,581 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:51,582 INFO  L93              Difference]: Finished difference Result 17 states and 18 transitions.
[2025-04-28 21:21:51,582 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:21:51,582 INFO  L79                 Accepts]: Start accepts. Automaton has  has 10 states, 5 states have (on average 2.2) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 6 states have call successors, (7) Word has length 13
[2025-04-28 21:21:51,583 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:51,584 INFO  L225             Difference]: With dead ends: 17
[2025-04-28 21:21:51,584 INFO  L226             Difference]: Without dead ends: 17
[2025-04-28 21:21:51,584 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132
[2025-04-28 21:21:51,586 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:51,588 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 46 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:51,588 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2025-04-28 21:21:51,594 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2025-04-28 21:21:51,594 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6)
[2025-04-28 21:21:51,596 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions.
[2025-04-28 21:21:51,596 INFO  L79                 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13
[2025-04-28 21:21:51,596 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:51,597 INFO  L485      AbstractCegarLoop]: Abstraction has 17 states and 18 transitions.
[2025-04-28 21:21:51,597 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 10 states, 5 states have (on average 2.2) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 6 states have call successors, (7)
[2025-04-28 21:21:51,598 INFO  L278                IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions.
[2025-04-28 21:21:51,599 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2025-04-28 21:21:51,599 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:51,599 INFO  L218           NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:51,605 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:51,800 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:51,800 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:51,801 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:51,801 INFO  L85        PathProgramCache]: Analyzing trace with hash 447752470, now seen corresponding path program 2 times
[2025-04-28 21:21:51,801 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:51,801 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797227789]
[2025-04-28 21:21:51,801 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:51,801 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:51,810 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes.
[2025-04-28 21:21:51,824 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:51,825 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:51,825 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:52,098 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2025-04-28 21:21:52,099 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:52,099 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797227789]
[2025-04-28 21:21:52,099 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797227789] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:52,099 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019140388]
[2025-04-28 21:21:52,099 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2025-04-28 21:21:52,099 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:52,102 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:52,105 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 21:21:52,109 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:52,145 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes.
[2025-04-28 21:21:52,163 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements.
[2025-04-28 21:21:52,164 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2025-04-28 21:21:52,164 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:52,165 INFO  L256         TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:52,166 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:52,448 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2025-04-28 21:21:52,448 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:53,073 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2025-04-28 21:21:53,073 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019140388] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:53,073 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:53,073 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 18
[2025-04-28 21:21:53,073 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159580199]
[2025-04-28 21:21:53,073 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:53,074 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2025-04-28 21:21:53,074 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:53,075 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2025-04-28 21:21:53,076 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306
[2025-04-28 21:21:53,077 INFO  L87              Difference]: Start difference. First operand 17 states and 18 transitions. Second operand  has 18 states, 10 states have (on average 2.0) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (13), 7 states have call predecessors, (13), 9 states have call successors, (13)
[2025-04-28 21:21:53,321 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:53,321 INFO  L93              Difference]: Finished difference Result 25 states and 26 transitions.
[2025-04-28 21:21:53,322 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2025-04-28 21:21:53,322 INFO  L79                 Accepts]: Start accepts. Automaton has  has 18 states, 10 states have (on average 2.0) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (13), 7 states have call predecessors, (13), 9 states have call successors, (13) Word has length 21
[2025-04-28 21:21:53,322 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:53,323 INFO  L225             Difference]: With dead ends: 25
[2025-04-28 21:21:53,323 INFO  L226             Difference]: Without dead ends: 25
[2025-04-28 21:21:53,323 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552
[2025-04-28 21:21:53,324 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:53,325 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:53,325 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2025-04-28 21:21:53,329 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2025-04-28 21:21:53,329 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 25 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10)
[2025-04-28 21:21:53,330 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions.
[2025-04-28 21:21:53,330 INFO  L79                 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21
[2025-04-28 21:21:53,330 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:53,330 INFO  L485      AbstractCegarLoop]: Abstraction has 25 states and 26 transitions.
[2025-04-28 21:21:53,330 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 10 states have (on average 2.0) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (13), 7 states have call predecessors, (13), 9 states have call successors, (13)
[2025-04-28 21:21:53,330 INFO  L278                IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions.
[2025-04-28 21:21:53,331 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2025-04-28 21:21:53,331 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:53,331 INFO  L218           NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:53,336 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:21:53,536 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:53,536 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:53,536 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:53,537 INFO  L85        PathProgramCache]: Analyzing trace with hash 827853094, now seen corresponding path program 3 times
[2025-04-28 21:21:53,537 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:53,537 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949852874]
[2025-04-28 21:21:53,537 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:53,537 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:53,543 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 8 equivalence classes.
[2025-04-28 21:21:53,592 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 37 of 37 statements.
[2025-04-28 21:21:53,595 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2025-04-28 21:21:53,595 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:54,312 INFO  L134       CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 68 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked.
[2025-04-28 21:21:54,313 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:54,313 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949852874]
[2025-04-28 21:21:54,313 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949852874] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:54,313 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822578999]
[2025-04-28 21:21:54,313 INFO  L95    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2025-04-28 21:21:54,313 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:54,316 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:54,318 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 21:21:54,323 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2025-04-28 21:21:54,359 INFO  L108    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 8 equivalence classes.
[2025-04-28 21:21:54,399 INFO  L111    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 37 of 37 statements.
[2025-04-28 21:21:54,399 INFO  L114    AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2025-04-28 21:21:54,400 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:54,401 INFO  L256         TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:54,403 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:54,721 INFO  L134       CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked.
[2025-04-28 21:21:54,721 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:01,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked.
[2025-04-28 21:22:01,564 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822578999] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:01,564 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:01,564 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 18] total 27
[2025-04-28 21:22:01,564 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339946257]
[2025-04-28 21:22:01,564 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:01,566 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 27 states
[2025-04-28 21:22:01,566 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:01,568 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2025-04-28 21:22:01,570 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702
[2025-04-28 21:22:01,570 INFO  L87              Difference]: Start difference. First operand 25 states and 26 transitions. Second operand  has 27 states, 14 states have (on average 2.0) internal successors, (28), 26 states have internal predecessors, (28), 14 states have call successors, (14), 1 states have call predecessors, (14), 13 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25)
[2025-04-28 21:22:01,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:01,868 INFO  L93              Difference]: Finished difference Result 35 states and 36 transitions.
[2025-04-28 21:22:01,869 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2025-04-28 21:22:01,869 INFO  L79                 Accepts]: Start accepts. Automaton has  has 27 states, 14 states have (on average 2.0) internal successors, (28), 26 states have internal predecessors, (28), 14 states have call successors, (14), 1 states have call predecessors, (14), 13 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) Word has length 37
[2025-04-28 21:22:01,869 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:01,870 INFO  L225             Difference]: With dead ends: 35
[2025-04-28 21:22:01,870 INFO  L226             Difference]: Without dead ends: 35
[2025-04-28 21:22:01,871 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=442, Invalid=964, Unknown=0, NotChecked=0, Total=1406
[2025-04-28 21:22:01,872 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:01,872 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 90 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:22:01,873 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2025-04-28 21:22:01,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35.
[2025-04-28 21:22:01,877 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 35 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15)
[2025-04-28 21:22:01,878 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions.
[2025-04-28 21:22:01,878 INFO  L79                 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 37
[2025-04-28 21:22:01,878 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:01,878 INFO  L485      AbstractCegarLoop]: Abstraction has 35 states and 36 transitions.
[2025-04-28 21:22:01,878 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 27 states, 14 states have (on average 2.0) internal successors, (28), 26 states have internal predecessors, (28), 14 states have call successors, (14), 1 states have call predecessors, (14), 13 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25)
[2025-04-28 21:22:01,879 INFO  L278                IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions.
[2025-04-28 21:22:01,880 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2025-04-28 21:22:01,880 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:01,880 INFO  L218           NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:01,885 INFO  L540       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2025-04-28 21:22:02,084 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:02,084 INFO  L403      AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:02,085 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:02,085 INFO  L85        PathProgramCache]: Analyzing trace with hash 419603578, now seen corresponding path program 4 times
[2025-04-28 21:22:02,085 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:02,085 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114633026]
[2025-04-28 21:22:02,085 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:22:02,085 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:02,093 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes.
[2025-04-28 21:22:02,122 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements.
[2025-04-28 21:22:02,126 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s)
[2025-04-28 21:22:02,126 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:03,046 INFO  L134       CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked.
[2025-04-28 21:22:03,046 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:03,046 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114633026]
[2025-04-28 21:22:03,047 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114633026] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:03,047 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896201901]
[2025-04-28 21:22:03,047 INFO  L95    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2025-04-28 21:22:03,047 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:03,049 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:03,051 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 21:22:03,054 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2025-04-28 21:22:03,123 INFO  L108    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes.
[2025-04-28 21:22:03,155 INFO  L111    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements.
[2025-04-28 21:22:03,155 INFO  L114    AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s)
[2025-04-28 21:22:03,155 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:03,157 INFO  L256         TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:03,160 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:03,537 INFO  L134       CoverageAnalysis]: Checked inductivity of 300 backedges. 11 proven. 156 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked.
[2025-04-28 21:22:03,537 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:20,914 INFO  L134       CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked.
[2025-04-28 21:22:20,915 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [896201901] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:20,915 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:20,915 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 28] total 41
[2025-04-28 21:22:20,915 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629213264]
[2025-04-28 21:22:20,915 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:20,918 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 41 states
[2025-04-28 21:22:20,918 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:20,919 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants.
[2025-04-28 21:22:20,920 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1195, Unknown=0, NotChecked=0, Total=1640
[2025-04-28 21:22:20,920 INFO  L87              Difference]: Start difference. First operand 35 states and 36 transitions. Second operand  has 41 states, 25 states have (on average 1.68) internal successors, (42), 40 states have internal predecessors, (42), 17 states have call successors, (17), 1 states have call predecessors, (17), 24 states have return successors, (40), 23 states have call predecessors, (40), 17 states have call successors, (40)
[2025-04-28 21:22:21,640 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:21,640 INFO  L93              Difference]: Finished difference Result 57 states and 58 transitions.
[2025-04-28 21:22:21,643 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2025-04-28 21:22:21,643 INFO  L79                 Accepts]: Start accepts. Automaton has  has 41 states, 25 states have (on average 1.68) internal successors, (42), 40 states have internal predecessors, (42), 17 states have call successors, (17), 1 states have call predecessors, (17), 24 states have return successors, (40), 23 states have call predecessors, (40), 17 states have call successors, (40) Word has length 57
[2025-04-28 21:22:21,644 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:21,645 INFO  L225             Difference]: With dead ends: 57
[2025-04-28 21:22:21,645 INFO  L226             Difference]: Without dead ends: 57
[2025-04-28 21:22:21,647 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 91 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1281, Invalid=2625, Unknown=0, NotChecked=0, Total=3906
[2025-04-28 21:22:21,648 INFO  L437           NwaCegarLoop]: 11 mSDtfsCounter, 101 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:21,648 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 115 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2025-04-28 21:22:21,649 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2025-04-28 21:22:21,655 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57.
[2025-04-28 21:22:21,656 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26)
[2025-04-28 21:22:21,657 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions.
[2025-04-28 21:22:21,657 INFO  L79                 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 57
[2025-04-28 21:22:21,657 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:21,657 INFO  L485      AbstractCegarLoop]: Abstraction has 57 states and 58 transitions.
[2025-04-28 21:22:21,658 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 41 states, 25 states have (on average 1.68) internal successors, (42), 40 states have internal predecessors, (42), 17 states have call successors, (17), 1 states have call predecessors, (17), 24 states have return successors, (40), 23 states have call predecessors, (40), 17 states have call successors, (40)
[2025-04-28 21:22:21,658 INFO  L278                IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions.
[2025-04-28 21:22:21,660 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2025-04-28 21:22:21,660 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:21,660 INFO  L218           NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:21,668 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2025-04-28 21:22:21,863 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2025-04-28 21:22:21,863 INFO  L403      AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:21,863 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:21,864 INFO  L85        PathProgramCache]: Analyzing trace with hash 403298662, now seen corresponding path program 5 times
[2025-04-28 21:22:21,864 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:21,864 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011910807]
[2025-04-28 21:22:21,864 INFO  L95    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2025-04-28 21:22:21,864 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:21,874 INFO  L108    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 101 statements into 24 equivalence classes.
[2025-04-28 21:22:22,336 INFO  L111    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 101 of 101 statements.
[2025-04-28 21:22:22,337 INFO  L114    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s)
[2025-04-28 21:22:22,337 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:24,936 INFO  L134       CoverageAnalysis]: Checked inductivity of 1081 backedges. 16 proven. 598 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked.
[2025-04-28 21:22:24,937 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:24,937 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011910807]
[2025-04-28 21:22:24,937 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011910807] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:24,937 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275960401]
[2025-04-28 21:22:24,937 INFO  L95    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2025-04-28 21:22:24,937 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:24,940 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:24,942 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 21:22:24,946 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2025-04-28 21:22:25,108 INFO  L108    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 101 statements into 24 equivalence classes.
[2025-04-28 21:22:25,314 INFO  L111    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 101 of 101 statements.
[2025-04-28 21:22:25,314 INFO  L114    AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s)
[2025-04-28 21:22:25,315 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:25,317 INFO  L256         TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 49 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:25,321 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
