./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-223.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:43,883 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:43,963 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5aea8c-cf17-4d96-a4fa-5f4730b05b36/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:43,974 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:43,974 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:44,012 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:44,013 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:44,014 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:44,015 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:44,015 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:44,016 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:44,016 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:44,016 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:44,016 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:44,016 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:44,016 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:44,016 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:44,017 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:44,017 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:44,018 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:44,018 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:44,019 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:44,019 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:44,019 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:44,019 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:44,020 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:44,020 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:44,328 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:44,340 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:44,343 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:44,344 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:44,344 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:44,346 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5aea8c-cf17-4d96-a4fa-5f4730b05b36/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-223.smt2
[2025-04-28 21:21:44,347 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:44,351 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:45,908 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5aea8c-cf17-4d96-a4fa-5f4730b05b36/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-223.smt2
[2025-04-28 21:21:45,912 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:45,915 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:45,916 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:45,916 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:45,916 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:45,919 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:45" (1/1) ...
[2025-04-28 21:21:46,001 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46 Unit
[2025-04-28 21:21:46,001 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:46,002 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:46,002 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:46,003 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:46,021 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,021 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,081 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,081 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,128 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,139 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,153 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,169 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,175 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,212 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:46,212 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:46,213 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:46,213 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:46,214 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (1/1) ...
[2025-04-28 21:21:46,217 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:46,232 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:46,250 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 21:21:46,254 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 21:21:46,268 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:46,269 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:46,269 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:46,269 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure CHC_COMP_FALSE given in one single declaration
[2025-04-28 21:21:46,269 INFO  L130     BoogieDeclarations]: Found specification of procedure CHC_COMP_FALSE
[2025-04-28 21:21:46,269 INFO  L138     BoogieDeclarations]: Found implementation of procedure CHC_COMP_FALSE
[2025-04-28 21:21:46,269 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Inv given in one single declaration
[2025-04-28 21:21:46,269 INFO  L130     BoogieDeclarations]: Found specification of procedure Inv
[2025-04-28 21:21:46,269 INFO  L138     BoogieDeclarations]: Found implementation of procedure Inv
[2025-04-28 21:21:46,269 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:46,269 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:46,269 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:46,349 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:46,353 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:48,487 INFO  L?                        ?]: Removed 33 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:48,487 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:48,525 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:48,527 INFO  L312             CfgBuilder]: Removed 2 assume(true) statements.
[2025-04-28 21:21:48,527 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:48 BoogieIcfgContainer
[2025-04-28 21:21:48,528 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:48,534 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:48,538 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:48,542 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:48,544 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:45" (1/3) ...
[2025-04-28 21:21:48,545 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653b258f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:48, skipping insertion in model container
[2025-04-28 21:21:48,545 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:46" (2/3) ...
[2025-04-28 21:21:48,546 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653b258f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:48, skipping insertion in model container
[2025-04-28 21:21:48,546 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:48" (3/3) ...
[2025-04-28 21:21:48,547 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:48,568 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:48,571 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 4 procedures, 295 locations, 1103 edges, 4 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:48,653 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:48,672 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;@52436741, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:48,672 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:48,679 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 295 states, 8 states have (on average 31.375) internal successors, (251), 251 states have internal predecessors, (251), 284 states have call successors, (284), 3 states have call predecessors, (284), 3 states have return successors, (284), 42 states have call predecessors, (284), 284 states have call successors, (284)
[2025-04-28 21:21:49,109 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2025-04-28 21:21:49,109 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:49,110 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2025-04-28 21:21:49,111 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:49,116 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:49,116 INFO  L85        PathProgramCache]: Analyzing trace with hash 1743352866, now seen corresponding path program 1 times
[2025-04-28 21:21:49,125 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:49,126 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037428187]
[2025-04-28 21:21:49,126 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:49,127 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:49,151 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes.
[2025-04-28 21:21:49,153 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements.
[2025-04-28 21:21:49,153 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:49,154 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:49,188 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 21:21:49,189 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:49,189 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037428187]
[2025-04-28 21:21:49,190 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037428187] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:49,190 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:49,195 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2025-04-28 21:21:49,197 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316912739]
[2025-04-28 21:21:49,198 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:49,205 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2025-04-28 21:21:49,206 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:49,239 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2025-04-28 21:21:49,240 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2025-04-28 21:21:49,244 INFO  L87              Difference]: Start difference. First operand  has 295 states, 8 states have (on average 31.375) internal successors, (251), 251 states have internal predecessors, (251), 284 states have call successors, (284), 3 states have call predecessors, (284), 3 states have return successors, (284), 42 states have call predecessors, (284), 284 states have call successors, (284) Second operand  has 2 states, 2 states have (on average 1.5) internal successors, (3), 1 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2025-04-28 21:21:49,457 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:49,458 INFO  L93              Difference]: Finished difference Result 293 states and 816 transitions.
[2025-04-28 21:21:49,460 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2025-04-28 21:21:49,463 INFO  L79                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 1.5) internal successors, (3), 1 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 5
[2025-04-28 21:21:49,463 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:49,571 INFO  L225             Difference]: With dead ends: 293
[2025-04-28 21:21:49,571 INFO  L226             Difference]: Without dead ends: 293
[2025-04-28 21:21:49,574 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2025-04-28 21:21:49,577 INFO  L437           NwaCegarLoop]: 816 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:49,580 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2025-04-28 21:21:49,614 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 293 states.
[2025-04-28 21:21:49,885 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293.
[2025-04-28 21:21:49,888 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 293 states, 6 states have (on average 41.333333333333336) internal successors, (248), 248 states have internal predecessors, (248), 284 states have call successors, (284), 3 states have call predecessors, (284), 3 states have return successors, (284), 42 states have call predecessors, (284), 284 states have call successors, (284)
[2025-04-28 21:21:49,953 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 816 transitions.
[2025-04-28 21:21:49,958 INFO  L79                 Accepts]: Start accepts. Automaton has 293 states and 816 transitions. Word has length 5
[2025-04-28 21:21:49,958 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:49,958 INFO  L485      AbstractCegarLoop]: Abstraction has 293 states and 816 transitions.
[2025-04-28 21:21:49,958 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 1.5) internal successors, (3), 1 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2025-04-28 21:21:49,958 INFO  L278                IsEmpty]: Start isEmpty. Operand 293 states and 816 transitions.
[2025-04-28 21:21:50,295 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2025-04-28 21:21:50,296 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:50,296 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:50,296 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:50,296 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:50,297 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:50,297 INFO  L85        PathProgramCache]: Analyzing trace with hash -627590625, now seen corresponding path program 1 times
[2025-04-28 21:21:50,297 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:50,297 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519844833]
[2025-04-28 21:21:50,297 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:50,298 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:50,304 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes.
[2025-04-28 21:21:50,329 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements.
[2025-04-28 21:21:50,329 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:50,329 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:50,448 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 21:21:50,449 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:50,449 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519844833]
[2025-04-28 21:21:50,449 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519844833] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:50,449 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:50,450 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:50,450 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021594640]
[2025-04-28 21:21:50,450 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:50,451 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:50,451 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:50,452 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:50,452 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:50,452 INFO  L87              Difference]: Start difference. First operand 293 states and 816 transitions. Second operand  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:21:55,485 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:55,485 INFO  L93              Difference]: Finished difference Result 384 states and 1337 transitions.
[2025-04-28 21:21:55,486 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:21:55,486 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 12
[2025-04-28 21:21:55,486 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:55,569 INFO  L225             Difference]: With dead ends: 384
[2025-04-28 21:21:55,569 INFO  L226             Difference]: Without dead ends: 384
[2025-04-28 21:21:55,569 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 21:21:55,573 INFO  L437           NwaCegarLoop]: 692 mSDtfsCounter, 49 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:55,573 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1424 Invalid, 1804 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [332 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time]
[2025-04-28 21:21:55,575 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 384 states.
[2025-04-28 21:21:55,844 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 382.
[2025-04-28 21:21:55,846 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 382 states, 8 states have (on average 37.25) internal successors, (298), 297 states have internal predecessors, (298), 371 states have call successors, (371), 4 states have call predecessors, (371), 4 states have return successors, (666), 81 states have call predecessors, (666), 371 states have call successors, (666)
[2025-04-28 21:21:55,885 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1335 transitions.
[2025-04-28 21:21:55,885 INFO  L79                 Accepts]: Start accepts. Automaton has 382 states and 1335 transitions. Word has length 12
[2025-04-28 21:21:55,886 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:55,886 INFO  L485      AbstractCegarLoop]: Abstraction has 382 states and 1335 transitions.
[2025-04-28 21:21:55,886 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:21:55,886 INFO  L278                IsEmpty]: Start isEmpty. Operand 382 states and 1335 transitions.
[2025-04-28 21:21:56,199 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2025-04-28 21:21:56,200 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:56,200 INFO  L218           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:56,200 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2025-04-28 21:21:56,200 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:56,203 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:56,203 INFO  L85        PathProgramCache]: Analyzing trace with hash -382339772, now seen corresponding path program 1 times
[2025-04-28 21:21:56,203 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:56,203 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704088000]
[2025-04-28 21:21:56,203 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:56,203 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:56,217 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes.
[2025-04-28 21:21:56,226 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements.
[2025-04-28 21:21:56,226 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:56,226 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:56,313 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 21:21:56,314 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:56,314 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704088000]
[2025-04-28 21:21:56,314 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704088000] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:56,314 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:56,314 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2025-04-28 21:21:56,314 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144298608]
[2025-04-28 21:21:56,314 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:56,318 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2025-04-28 21:21:56,318 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:56,319 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2025-04-28 21:21:56,319 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2025-04-28 21:21:56,319 INFO  L87              Difference]: Start difference. First operand 382 states and 1335 transitions. Second operand  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:22:00,487 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:00,487 INFO  L93              Difference]: Finished difference Result 382 states and 1333 transitions.
[2025-04-28 21:22:00,488 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2025-04-28 21:22:00,488 INFO  L79                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 12
[2025-04-28 21:22:00,488 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:00,566 INFO  L225             Difference]: With dead ends: 382
[2025-04-28 21:22:00,566 INFO  L226             Difference]: Without dead ends: 382
[2025-04-28 21:22:00,567 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 21:22:00,567 INFO  L437           NwaCegarLoop]: 692 mSDtfsCounter, 49 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:00,568 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1422 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time]
[2025-04-28 21:22:00,569 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 382 states.
[2025-04-28 21:22:00,827 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382.
[2025-04-28 21:22:00,829 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 382 states, 8 states have (on average 37.25) internal successors, (298), 297 states have internal predecessors, (298), 371 states have call successors, (371), 4 states have call predecessors, (371), 4 states have return successors, (664), 81 states have call predecessors, (664), 371 states have call successors, (664)
[2025-04-28 21:22:00,866 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1333 transitions.
[2025-04-28 21:22:00,866 INFO  L79                 Accepts]: Start accepts. Automaton has 382 states and 1333 transitions. Word has length 12
[2025-04-28 21:22:00,866 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:22:00,866 INFO  L485      AbstractCegarLoop]: Abstraction has 382 states and 1333 transitions.
[2025-04-28 21:22:00,866 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3)
[2025-04-28 21:22:00,866 INFO  L278                IsEmpty]: Start isEmpty. Operand 382 states and 1333 transitions.
[2025-04-28 21:22:01,105 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2025-04-28 21:22:01,105 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:22:01,105 INFO  L218           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:22:01,105 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2025-04-28 21:22:01,105 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:22:01,107 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:22:01,107 INFO  L85        PathProgramCache]: Analyzing trace with hash -310523766, now seen corresponding path program 1 times
[2025-04-28 21:22:01,107 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:22:01,107 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706028949]
[2025-04-28 21:22:01,107 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:01,108 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:22:01,115 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes.
[2025-04-28 21:22:01,126 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements.
[2025-04-28 21:22:01,127 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:01,127 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:01,248 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 21:22:01,248 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:22:01,248 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706028949]
[2025-04-28 21:22:01,248 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706028949] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:22:01,248 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572036692]
[2025-04-28 21:22:01,248 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:22:01,248 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:22:01,251 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:22:01,256 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 21:22:01,260 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:22:01,323 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes.
[2025-04-28 21:22:01,365 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements.
[2025-04-28 21:22:01,365 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:22:01,366 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:22:01,368 INFO  L256         TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjuncts are in the unsatisfiable core
[2025-04-28 21:22:01,375 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:22:01,435 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 21:22:01,436 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:22:01,631 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 21:22:01,632 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [572036692] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:22:01,632 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:22:01,632 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6
[2025-04-28 21:22:01,633 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055004048]
[2025-04-28 21:22:01,633 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:22:01,633 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2025-04-28 21:22:01,633 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:22:01,634 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2025-04-28 21:22:01,634 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2025-04-28 21:22:01,634 INFO  L87              Difference]: Start difference. First operand 382 states and 1333 transitions. Second operand  has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5)
[2025-04-28 21:22:16,786 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:22:16,787 INFO  L93              Difference]: Finished difference Result 926 states and 5138 transitions.
[2025-04-28 21:22:16,787 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2025-04-28 21:22:16,787 INFO  L79                 Accepts]: Start accepts. Automaton has  has 6 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 15
[2025-04-28 21:22:16,788 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:22:17,057 INFO  L225             Difference]: With dead ends: 926
[2025-04-28 21:22:17,057 INFO  L226             Difference]: Without dead ends: 926
[2025-04-28 21:22:17,058 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2025-04-28 21:22:17,058 INFO  L437           NwaCegarLoop]: 1211 mSDtfsCounter, 284 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 4772 mSolverCounterSat, 1298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 6070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1298 IncrementalHoareTripleChecker+Valid, 4772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time
[2025-04-28 21:22:17,059 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 3274 Invalid, 6070 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1298 Valid, 4772 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time]
[2025-04-28 21:22:17,060 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 926 states.
