/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:17:02,814 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:17:02,855 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:17:02,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:17:02,870 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:17:02,870 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:17:02,871 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:17:02,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:17:02,871 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:17:02,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:17:02,872 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:17:02,872 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:17:02,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:17:02,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:17:02,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:17:02,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:17:02,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:17:02,874 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:17:02,874 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:17:02,874 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:17:02,874 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:17:02,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:17:02,875 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:17:02,875 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:17:02,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:17:02,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:02,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:17:02,876 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:17:02,877 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:17:02,877 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:17:02,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:17:02,877 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:17:02,878 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:17:02,878 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:17:03,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:17:03,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:17:03,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:17:03,097 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:17:03,097 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:17:03,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-12-05 21:17:04,177 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:17:04,436 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:17:04,437 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-12-05 21:17:04,449 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73a0c2635/e0d46b3f4b0b448c8d2bbd01250278d2/FLAG5824b825e [2023-12-05 21:17:04,459 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73a0c2635/e0d46b3f4b0b448c8d2bbd01250278d2 [2023-12-05 21:17:04,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:17:04,462 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:17:04,463 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:04,463 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:17:04,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:17:04,466 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff91893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04, skipping insertion in model container [2023-12-05 21:17:04,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,500 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:17:04,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:04,770 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:17:04,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:04,832 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:17:04,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04 WrapperNode [2023-12-05 21:17:04,832 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:04,833 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:04,833 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:17:04,833 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:17:04,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,849 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,869 INFO L138 Inliner]: procedures = 272, calls = 48, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 291 [2023-12-05 21:17:04,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:04,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:17:04,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:17:04,870 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:17:04,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,880 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,880 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,886 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,890 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,891 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:17:04,895 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:17:04,895 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:17:04,895 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:17:04,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (1/1) ... [2023-12-05 21:17:04,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:04,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:04,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:17:04,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:17:04,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:17:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:17:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:17:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:17:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:17:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:17:04,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:17:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:17:04,952 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:17:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:17:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:17:04,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:17:04,953 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:17:05,100 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:17:05,102 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:17:05,403 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:17:05,456 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:17:05,456 INFO L309 CfgBuilder]: Removed 35 assume(true) statements. [2023-12-05 21:17:05,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:05 BoogieIcfgContainer [2023-12-05 21:17:05,457 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:17:05,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:17:05,459 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:17:05,461 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:17:05,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:17:04" (1/3) ... [2023-12-05 21:17:05,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798ab9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:05, skipping insertion in model container [2023-12-05 21:17:05,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:04" (2/3) ... [2023-12-05 21:17:05,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798ab9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:05, skipping insertion in model container [2023-12-05 21:17:05,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:05" (3/3) ... [2023-12-05 21:17:05,463 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2023-12-05 21:17:05,476 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:17:05,476 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-12-05 21:17:05,476 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:17:05,594 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-05 21:17:05,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 311 transitions, 629 flow [2023-12-05 21:17:05,752 INFO L124 PetriNetUnfolderBase]: 78/490 cut-off events. [2023-12-05 21:17:05,752 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-05 21:17:05,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 490 events. 78/490 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2612 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 274. Up to 8 conditions per place. [2023-12-05 21:17:05,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 311 transitions, 629 flow [2023-12-05 21:17:05,776 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 311 transitions, 629 flow [2023-12-05 21:17:05,788 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:05,793 INFO L362 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5633dcfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:05,794 INFO L363 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-12-05 21:17:05,804 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:05,804 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2023-12-05 21:17:05,805 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:05,805 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:05,805 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:05,806 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:05,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:05,810 INFO L85 PathProgramCache]: Analyzing trace with hash -229888053, now seen corresponding path program 1 times [2023-12-05 21:17:05,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:05,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056073499] [2023-12-05 21:17:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:05,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:06,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:06,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056073499] [2023-12-05 21:17:06,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056073499] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:06,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:06,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:06,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153841214] [2023-12-05 21:17:06,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:06,012 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:06,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:06,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:06,038 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 311 [2023-12-05 21:17:06,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 311 transitions, 629 flow. Second operand has 3 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:06,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 311 [2023-12-05 21:17:06,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:06,288 INFO L124 PetriNetUnfolderBase]: 161/1612 cut-off events. [2023-12-05 21:17:06,288 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:17:06,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1927 conditions, 1612 events. 161/1612 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 13610 event pairs, 120 based on Foata normal form. 381/1716 useless extension candidates. Maximal degree in co-relation 1703. Up to 305 conditions per place. [2023-12-05 21:17:06,299 INFO L140 encePairwiseOnDemand]: 267/311 looper letters, 35 selfloop transitions, 2 changer transitions 0/265 dead transitions. [2023-12-05 21:17:06,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 265 transitions, 611 flow [2023-12-05 21:17:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-12-05 21:17:06,315 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8381564844587353 [2023-12-05 21:17:06,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-12-05 21:17:06,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-12-05 21:17:06,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:06,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-12-05 21:17:06,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,334 INFO L308 CegarLoopForPetriNet]: 266 programPoint places, -7 predicate places. [2023-12-05 21:17:06,334 INFO L500 AbstractCegarLoop]: Abstraction has has 259 places, 265 transitions, 611 flow [2023-12-05 21:17:06,335 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,335 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:06,335 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:06,335 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:17:06,335 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:06,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1577400416, now seen corresponding path program 1 times [2023-12-05 21:17:06,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:06,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168528003] [2023-12-05 21:17:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:06,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:06,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168528003] [2023-12-05 21:17:06,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168528003] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:06,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339664266] [2023-12-05 21:17:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:06,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:06,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:06,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:06,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:17:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:06,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:06,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:06,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:06,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339664266] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:06,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:06,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:06,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927221159] [2023-12-05 21:17:06,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:06,682 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:06,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:06,685 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 311 [2023-12-05 21:17:06,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 265 transitions, 611 flow. Second operand has 10 states, 10 states have (on average 235.1) internal successors, (2351), 10 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:06,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 311 [2023-12-05 21:17:06,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:06,954 INFO L124 PetriNetUnfolderBase]: 161/1619 cut-off events. [2023-12-05 21:17:06,955 INFO L125 PetriNetUnfolderBase]: For 180/192 co-relation queries the response was YES. [2023-12-05 21:17:06,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2256 conditions, 1619 events. 161/1619 cut-off events. For 180/192 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 13574 event pairs, 120 based on Foata normal form. 0/1342 useless extension candidates. Maximal degree in co-relation 1981. Up to 310 conditions per place. [2023-12-05 21:17:06,965 INFO L140 encePairwiseOnDemand]: 305/311 looper letters, 36 selfloop transitions, 9 changer transitions 0/272 dead transitions. [2023-12-05 21:17:06,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 272 transitions, 725 flow [2023-12-05 21:17:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2144 transitions. [2023-12-05 21:17:06,969 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.765987852804573 [2023-12-05 21:17:06,969 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2144 transitions. [2023-12-05 21:17:06,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2144 transitions. [2023-12-05 21:17:06,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:06,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2144 transitions. [2023-12-05 21:17:06,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 238.22222222222223) internal successors, (2144), 9 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 311.0) internal successors, (3110), 10 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,978 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 311.0) internal successors, (3110), 10 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,980 INFO L308 CegarLoopForPetriNet]: 266 programPoint places, 1 predicate places. [2023-12-05 21:17:06,980 INFO L500 AbstractCegarLoop]: Abstraction has has 267 places, 272 transitions, 725 flow [2023-12-05 21:17:06,981 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 235.1) internal successors, (2351), 10 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,981 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:06,982 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:07,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-05 21:17:07,188 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:07,188 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:07,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:07,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1440852160, now seen corresponding path program 2 times [2023-12-05 21:17:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:07,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68478072] [2023-12-05 21:17:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:07,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:07,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:07,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68478072] [2023-12-05 21:17:07,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68478072] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:07,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:07,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:07,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245734856] [2023-12-05 21:17:07,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:07,280 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:07,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:07,282 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 311 [2023-12-05 21:17:07,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 272 transitions, 725 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:07,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 311 [2023-12-05 21:17:07,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:07,730 INFO L124 PetriNetUnfolderBase]: 828/3982 cut-off events. [2023-12-05 21:17:07,730 INFO L125 PetriNetUnfolderBase]: For 1657/1669 co-relation queries the response was YES. [2023-12-05 21:17:07,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7015 conditions, 3982 events. 828/3982 cut-off events. For 1657/1669 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 41251 event pairs, 684 based on Foata normal form. 0/3396 useless extension candidates. Maximal degree in co-relation 6690. Up to 1504 conditions per place. [2023-12-05 21:17:07,749 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 84 selfloop transitions, 2 changer transitions 0/288 dead transitions. [2023-12-05 21:17:07,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 288 transitions, 961 flow [2023-12-05 21:17:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 679 transitions. [2023-12-05 21:17:07,751 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7277599142550911 [2023-12-05 21:17:07,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 679 transitions. [2023-12-05 21:17:07,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 679 transitions. [2023-12-05 21:17:07,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:07,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 679 transitions. [2023-12-05 21:17:07,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,756 INFO L308 CegarLoopForPetriNet]: 266 programPoint places, 1 predicate places. [2023-12-05 21:17:07,756 INFO L500 AbstractCegarLoop]: Abstraction has has 267 places, 288 transitions, 961 flow [2023-12-05 21:17:07,757 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,757 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:07,757 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:07,757 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:17:07,757 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:07,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1440852159, now seen corresponding path program 1 times [2023-12-05 21:17:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:07,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214116752] [2023-12-05 21:17:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:07,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:07,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:07,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214116752] [2023-12-05 21:17:07,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214116752] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:07,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157526560] [2023-12-05 21:17:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:07,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:07,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:07,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:07,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:17:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:07,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:07,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:08,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:08,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157526560] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:08,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:08,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:08,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693670306] [2023-12-05 21:17:08,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:08,115 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:08,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:08,119 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 311 [2023-12-05 21:17:08,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 288 transitions, 961 flow. Second operand has 18 states, 18 states have (on average 235.27777777777777) internal successors, (4235), 18 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:08,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 311 [2023-12-05 21:17:08,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:08,641 INFO L124 PetriNetUnfolderBase]: 828/4002 cut-off events. [2023-12-05 21:17:08,641 INFO L125 PetriNetUnfolderBase]: For 3307/3325 co-relation queries the response was YES. [2023-12-05 21:17:08,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7792 conditions, 4002 events. 828/4002 cut-off events. For 3307/3325 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 41194 event pairs, 684 based on Foata normal form. 0/3416 useless extension candidates. Maximal degree in co-relation 7352. Up to 1504 conditions per place. [2023-12-05 21:17:08,666 INFO L140 encePairwiseOnDemand]: 305/311 looper letters, 52 selfloop transitions, 21 changer transitions 0/308 dead transitions. [2023-12-05 21:17:08,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 308 transitions, 1219 flow [2023-12-05 21:17:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4962 transitions. [2023-12-05 21:17:08,739 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7597611391823611 [2023-12-05 21:17:08,739 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4962 transitions. [2023-12-05 21:17:08,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4962 transitions. [2023-12-05 21:17:08,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:08,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4962 transitions. [2023-12-05 21:17:08,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 236.28571428571428) internal successors, (4962), 21 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 311.0) internal successors, (6842), 22 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,756 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 311.0) internal successors, (6842), 22 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,757 INFO L308 CegarLoopForPetriNet]: 266 programPoint places, 21 predicate places. [2023-12-05 21:17:08,757 INFO L500 AbstractCegarLoop]: Abstraction has has 287 places, 308 transitions, 1219 flow [2023-12-05 21:17:08,758 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 235.27777777777777) internal successors, (4235), 18 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,758 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:08,759 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:08,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:08,963 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-05 21:17:08,964 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:08,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1204073215, now seen corresponding path program 2 times [2023-12-05 21:17:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:08,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871233262] [2023-12-05 21:17:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:09,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:09,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871233262] [2023-12-05 21:17:09,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871233262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:09,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:09,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:09,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363229520] [2023-12-05 21:17:09,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:09,090 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:09,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:09,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:17:09,092 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 311 [2023-12-05 21:17:09,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 308 transitions, 1219 flow. Second operand has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:09,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 311 [2023-12-05 21:17:09,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:09,608 INFO L124 PetriNetUnfolderBase]: 1223/4347 cut-off events. [2023-12-05 21:17:09,609 INFO L125 PetriNetUnfolderBase]: For 6869/6944 co-relation queries the response was YES. [2023-12-05 21:17:09,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10898 conditions, 4347 events. 1223/4347 cut-off events. For 6869/6944 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 43823 event pairs, 208 based on Foata normal form. 0/4069 useless extension candidates. Maximal degree in co-relation 10635. Up to 1871 conditions per place. [2023-12-05 21:17:09,632 INFO L140 encePairwiseOnDemand]: 305/311 looper letters, 120 selfloop transitions, 4 changer transitions 0/346 dead transitions. [2023-12-05 21:17:09,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 346 transitions, 1693 flow [2023-12-05 21:17:09,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:17:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:17:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 881 transitions. [2023-12-05 21:17:09,635 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7081993569131833 [2023-12-05 21:17:09,635 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 881 transitions. [2023-12-05 21:17:09,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 881 transitions. [2023-12-05 21:17:09,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:09,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 881 transitions. [2023-12-05 21:17:09,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.25) internal successors, (881), 4 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,639 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,639 INFO L308 CegarLoopForPetriNet]: 266 programPoint places, 24 predicate places. [2023-12-05 21:17:09,639 INFO L500 AbstractCegarLoop]: Abstraction has has 290 places, 346 transitions, 1693 flow [2023-12-05 21:17:09,640 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,640 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:09,640 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:09,640 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:17:09,640 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:09,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:09,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1400398289, now seen corresponding path program 1 times [2023-12-05 21:17:09,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:09,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505505947] [2023-12-05 21:17:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:09,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:09,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:09,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505505947] [2023-12-05 21:17:09,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505505947] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:09,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536056538] [2023-12-05 21:17:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:09,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:09,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:09,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:09,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-05 21:17:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:09,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:17:09,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:09,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:10,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536056538] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:10,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:10,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:17:10,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373087643] [2023-12-05 21:17:10,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:10,102 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:17:10,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:10,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:17:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:17:10,106 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 311 [2023-12-05 21:17:10,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 346 transitions, 1693 flow. Second operand has 23 states, 23 states have (on average 235.47826086956522) internal successors, (5416), 23 states have internal predecessors, (5416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:10,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 311 [2023-12-05 21:17:10,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:10,929 INFO L124 PetriNetUnfolderBase]: 1280/4453 cut-off events. [2023-12-05 21:17:10,929 INFO L125 PetriNetUnfolderBase]: For 10750/10895 co-relation queries the response was YES. [2023-12-05 21:17:10,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12263 conditions, 4453 events. 1280/4453 cut-off events. For 10750/10895 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 44109 event pairs, 1081 based on Foata normal form. 0/4147 useless extension candidates. Maximal degree in co-relation 11876. Up to 1925 conditions per place. [2023-12-05 21:17:10,957 INFO L140 encePairwiseOnDemand]: 305/311 looper letters, 74 selfloop transitions, 30 changer transitions 0/361 dead transitions. [2023-12-05 21:17:10,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 361 transitions, 2015 flow [2023-12-05 21:17:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:17:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:17:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7073 transitions. [2023-12-05 21:17:10,967 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7580921757770632 [2023-12-05 21:17:10,967 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7073 transitions. [2023-12-05 21:17:10,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7073 transitions. [2023-12-05 21:17:10,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:10,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7073 transitions. [2023-12-05 21:17:10,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 235.76666666666668) internal successors, (7073), 30 states have internal predecessors, (7073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 311.0) internal successors, (9641), 31 states have internal predecessors, (9641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,990 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 311.0) internal successors, (9641), 31 states have internal predecessors, (9641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,990 INFO L308 CegarLoopForPetriNet]: 266 programPoint places, 53 predicate places. [2023-12-05 21:17:10,990 INFO L500 AbstractCegarLoop]: Abstraction has has 319 places, 361 transitions, 2015 flow [2023-12-05 21:17:10,992 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 235.47826086956522) internal successors, (5416), 23 states have internal predecessors, (5416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,992 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:10,992 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:11,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-05 21:17:11,199 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:11,199 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:11,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:11,200 INFO L85 PathProgramCache]: Analyzing trace with hash 589124732, now seen corresponding path program 2 times [2023-12-05 21:17:11,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:11,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568741898] [2023-12-05 21:17:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:11,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:11,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:11,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568741898] [2023-12-05 21:17:11,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568741898] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:11,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305375042] [2023-12-05 21:17:11,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:11,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:11,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:11,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:11,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-05 21:17:11,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:17:11,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:11,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:17:11,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:11,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:17:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:11,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:11,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305375042] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:11,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:11,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:17:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042870813] [2023-12-05 21:17:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:11,610 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:17:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:17:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:17:11,612 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 311 [2023-12-05 21:17:11,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 361 transitions, 2015 flow. Second operand has 7 states, 7 states have (on average 193.14285714285714) internal successors, (1352), 7 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:11,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:11,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 311 [2023-12-05 21:17:11,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:12,279 INFO L124 PetriNetUnfolderBase]: 1278/4509 cut-off events. [2023-12-05 21:17:12,279 INFO L125 PetriNetUnfolderBase]: For 14713/15149 co-relation queries the response was YES. [2023-12-05 21:17:12,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14354 conditions, 4509 events. 1278/4509 cut-off events. For 14713/15149 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 44895 event pairs, 199 based on Foata normal form. 24/4264 useless extension candidates. Maximal degree in co-relation 13949. Up to 1901 conditions per place. [2023-12-05 21:17:12,408 INFO L140 encePairwiseOnDemand]: 302/311 looper letters, 188 selfloop transitions, 8 changer transitions 0/432 dead transitions. [2023-12-05 21:17:12,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 432 transitions, 3049 flow [2023-12-05 21:17:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:17:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:17:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1712 transitions. [2023-12-05 21:17:12,411 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6881028938906752 [2023-12-05 21:17:12,411 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1712 transitions. [2023-12-05 21:17:12,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1712 transitions. [2023-12-05 21:17:12,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:12,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1712 transitions. [2023-12-05 21:17:12,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 311.0) internal successors, (2799), 9 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,417 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 311.0) internal successors, (2799), 9 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,433 INFO L308 CegarLoopForPetriNet]: 266 programPoint places, 59 predicate places. [2023-12-05 21:17:12,433 INFO L500 AbstractCegarLoop]: Abstraction has has 325 places, 432 transitions, 3049 flow [2023-12-05 21:17:12,434 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 193.14285714285714) internal successors, (1352), 7 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,434 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:12,434 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:12,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:12,635 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:12,635 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:12,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1082998436, now seen corresponding path program 1 times [2023-12-05 21:17:12,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:12,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138258558] [2023-12-05 21:17:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:12,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:12,661 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:17:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:12,699 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:17:12,699 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:17:12,700 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2023-12-05 21:17:12,701 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 45 remaining) [2023-12-05 21:17:12,702 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 45 remaining) [2023-12-05 21:17:12,702 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 45 remaining) [2023-12-05 21:17:12,702 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 45 remaining) [2023-12-05 21:17:12,703 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 45 remaining) [2023-12-05 21:17:12,703 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 45 remaining) [2023-12-05 21:17:12,703 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 45 remaining) [2023-12-05 21:17:12,703 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 45 remaining) [2023-12-05 21:17:12,703 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 45 remaining) [2023-12-05 21:17:12,704 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 45 remaining) [2023-12-05 21:17:12,706 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 45 remaining) [2023-12-05 21:17:12,707 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 45 remaining) [2023-12-05 21:17:12,707 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 45 remaining) [2023-12-05 21:17:12,707 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 45 remaining) [2023-12-05 21:17:12,707 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 45 remaining) [2023-12-05 21:17:12,707 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 45 remaining) [2023-12-05 21:17:12,707 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 45 remaining) [2023-12-05 21:17:12,709 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 45 remaining) [2023-12-05 21:17:12,710 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 45 remaining) [2023-12-05 21:17:12,710 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 45 remaining) [2023-12-05 21:17:12,710 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 45 remaining) [2023-12-05 21:17:12,710 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 45 remaining) [2023-12-05 21:17:12,710 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 45 remaining) [2023-12-05 21:17:12,710 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 45 remaining) [2023-12-05 21:17:12,710 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 45 remaining) [2023-12-05 21:17:12,710 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:17:12,711 INFO L457 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2023-12-05 21:17:12,712 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:17:12,712 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:17:12,754 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:17:12,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 403 transitions, 822 flow [2023-12-05 21:17:12,820 INFO L124 PetriNetUnfolderBase]: 126/789 cut-off events. [2023-12-05 21:17:12,820 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-05 21:17:12,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 789 events. 126/789 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4762 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 492. Up to 12 conditions per place. [2023-12-05 21:17:12,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 403 transitions, 822 flow [2023-12-05 21:17:12,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 403 transitions, 822 flow [2023-12-05 21:17:12,840 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:12,841 INFO L362 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5633dcfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:12,841 INFO L363 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-12-05 21:17:12,842 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:12,842 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2023-12-05 21:17:12,842 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:12,842 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:12,842 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:12,843 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:12,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash -654481141, now seen corresponding path program 1 times [2023-12-05 21:17:12,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:12,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421798798] [2023-12-05 21:17:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:12,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:12,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:12,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421798798] [2023-12-05 21:17:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421798798] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:12,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:12,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:12,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672959568] [2023-12-05 21:17:12,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:12,861 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:12,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:12,862 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 403 [2023-12-05 21:17:12,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 403 transitions, 822 flow. Second operand has 3 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:12,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 403 [2023-12-05 21:17:12,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:14,508 INFO L124 PetriNetUnfolderBase]: 2887/15920 cut-off events. [2023-12-05 21:17:14,508 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2023-12-05 21:17:14,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20182 conditions, 15920 events. 2887/15920 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 209466 event pairs, 2376 based on Foata normal form. 5261/18705 useless extension candidates. Maximal degree in co-relation 18074. Up to 4186 conditions per place. [2023-12-05 21:17:14,632 INFO L140 encePairwiseOnDemand]: 346/403 looper letters, 45 selfloop transitions, 2 changer transitions 0/341 dead transitions. [2023-12-05 21:17:14,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 341 transitions, 792 flow [2023-12-05 21:17:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1009 transitions. [2023-12-05 21:17:14,634 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8345740281224152 [2023-12-05 21:17:14,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1009 transitions. [2023-12-05 21:17:14,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1009 transitions. [2023-12-05 21:17:14,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:14,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1009 transitions. [2023-12-05 21:17:14,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,638 INFO L308 CegarLoopForPetriNet]: 344 programPoint places, -10 predicate places. [2023-12-05 21:17:14,638 INFO L500 AbstractCegarLoop]: Abstraction has has 334 places, 341 transitions, 792 flow [2023-12-05 21:17:14,638 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,638 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:14,639 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:14,639 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:17:14,639 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:14,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash -967699469, now seen corresponding path program 1 times [2023-12-05 21:17:14,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:14,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868496893] [2023-12-05 21:17:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:14,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868496893] [2023-12-05 21:17:14,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868496893] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:14,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949643288] [2023-12-05 21:17:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:14,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:14,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:14,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:14,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-05 21:17:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:14,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:14,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:14,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:14,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949643288] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:14,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:14,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:14,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189316938] [2023-12-05 21:17:14,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:14,817 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:14,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:14,833 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 403 [2023-12-05 21:17:14,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 341 transitions, 792 flow. Second operand has 10 states, 10 states have (on average 303.1) internal successors, (3031), 10 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:14,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 403 [2023-12-05 21:17:14,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:16,437 INFO L124 PetriNetUnfolderBase]: 2887/15927 cut-off events. [2023-12-05 21:17:16,437 INFO L125 PetriNetUnfolderBase]: For 1737/1853 co-relation queries the response was YES. [2023-12-05 21:17:16,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24392 conditions, 15927 events. 2887/15927 cut-off events. For 1737/1853 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 209449 event pairs, 2376 based on Foata normal form. 0/13451 useless extension candidates. Maximal degree in co-relation 21917. Up to 4191 conditions per place. [2023-12-05 21:17:16,572 INFO L140 encePairwiseOnDemand]: 397/403 looper letters, 46 selfloop transitions, 9 changer transitions 0/348 dead transitions. [2023-12-05 21:17:16,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 348 transitions, 926 flow [2023-12-05 21:17:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:16,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2766 transitions. [2023-12-05 21:17:16,577 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7626137303556658 [2023-12-05 21:17:16,577 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2766 transitions. [2023-12-05 21:17:16,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2766 transitions. [2023-12-05 21:17:16,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:16,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2766 transitions. [2023-12-05 21:17:16,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 307.3333333333333) internal successors, (2766), 9 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:16,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:16,586 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:16,586 INFO L308 CegarLoopForPetriNet]: 344 programPoint places, -2 predicate places. [2023-12-05 21:17:16,586 INFO L500 AbstractCegarLoop]: Abstraction has has 342 places, 348 transitions, 926 flow [2023-12-05 21:17:16,587 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 303.1) internal successors, (3031), 10 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:16,587 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:16,587 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:16,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:16,806 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-05 21:17:16,807 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:16,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash -746183949, now seen corresponding path program 2 times [2023-12-05 21:17:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:16,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030090234] [2023-12-05 21:17:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:16,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:16,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:16,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030090234] [2023-12-05 21:17:16,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030090234] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:16,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:16,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:16,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134199742] [2023-12-05 21:17:16,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:16,843 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:16,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:16,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:16,844 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 403 [2023-12-05 21:17:16,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 348 transitions, 926 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:16,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:16,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 403 [2023-12-05 21:17:16,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:27,465 INFO L124 PetriNetUnfolderBase]: 31836/91889 cut-off events. [2023-12-05 21:17:27,465 INFO L125 PetriNetUnfolderBase]: For 44997/45298 co-relation queries the response was YES. [2023-12-05 21:17:27,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180421 conditions, 91889 events. 31836/91889 cut-off events. For 44997/45298 co-relation queries the response was YES. Maximal size of possible extension queue 3215. Compared 1341027 event pairs, 27090 based on Foata normal form. 0/76432 useless extension candidates. Maximal degree in co-relation 13114. Up to 43608 conditions per place. [2023-12-05 21:17:28,267 INFO L140 encePairwiseOnDemand]: 399/403 looper letters, 122 selfloop transitions, 2 changer transitions 0/382 dead transitions. [2023-12-05 21:17:28,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 382 transitions, 1306 flow [2023-12-05 21:17:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2023-12-05 21:17:28,269 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7369727047146402 [2023-12-05 21:17:28,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2023-12-05 21:17:28,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2023-12-05 21:17:28,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:28,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2023-12-05 21:17:28,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,273 INFO L308 CegarLoopForPetriNet]: 344 programPoint places, -2 predicate places. [2023-12-05 21:17:28,273 INFO L500 AbstractCegarLoop]: Abstraction has has 342 places, 382 transitions, 1306 flow [2023-12-05 21:17:28,273 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,273 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:28,273 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:28,273 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:17:28,273 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:28,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash -746183948, now seen corresponding path program 1 times [2023-12-05 21:17:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:28,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451499488] [2023-12-05 21:17:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:28,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451499488] [2023-12-05 21:17:28,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451499488] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42721594] [2023-12-05 21:17:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:28,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:28,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:28,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:28,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-05 21:17:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:28,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:28,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42721594] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:28,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:28,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:28,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28784973] [2023-12-05 21:17:28,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:28,537 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:28,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:28,540 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 403 [2023-12-05 21:17:28,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 382 transitions, 1306 flow. Second operand has 18 states, 18 states have (on average 303.27777777777777) internal successors, (5459), 18 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:28,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 403 [2023-12-05 21:17:28,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:39,255 INFO L124 PetriNetUnfolderBase]: 31836/91909 cut-off events. [2023-12-05 21:17:39,255 INFO L125 PetriNetUnfolderBase]: For 89603/90054 co-relation queries the response was YES. [2023-12-05 21:17:39,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201137 conditions, 91909 events. 31836/91909 cut-off events. For 89603/90054 co-relation queries the response was YES. Maximal size of possible extension queue 3215. Compared 1341454 event pairs, 27090 based on Foata normal form. 0/76452 useless extension candidates. Maximal degree in co-relation 15376. Up to 43608 conditions per place. [2023-12-05 21:17:40,128 INFO L140 encePairwiseOnDemand]: 397/403 looper letters, 70 selfloop transitions, 21 changer transitions 0/402 dead transitions. [2023-12-05 21:17:40,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 402 transitions, 1600 flow [2023-12-05 21:17:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6400 transitions. [2023-12-05 21:17:40,138 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7562330142975304 [2023-12-05 21:17:40,138 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6400 transitions. [2023-12-05 21:17:40,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6400 transitions. [2023-12-05 21:17:40,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:40,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6400 transitions. [2023-12-05 21:17:40,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 304.76190476190476) internal successors, (6400), 21 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,159 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,159 INFO L308 CegarLoopForPetriNet]: 344 programPoint places, 18 predicate places. [2023-12-05 21:17:40,160 INFO L500 AbstractCegarLoop]: Abstraction has has 362 places, 402 transitions, 1600 flow [2023-12-05 21:17:40,161 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 303.27777777777777) internal successors, (5459), 18 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,161 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:40,161 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:40,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:40,366 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:40,367 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:40,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:40,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1211498252, now seen corresponding path program 2 times [2023-12-05 21:17:40,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:40,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912948337] [2023-12-05 21:17:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:40,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:40,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:40,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912948337] [2023-12-05 21:17:40,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912948337] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:40,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:40,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:40,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10710186] [2023-12-05 21:17:40,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:40,435 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:40,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:40,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:17:40,436 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 403 [2023-12-05 21:17:40,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 402 transitions, 1600 flow. Second operand has 4 states, 4 states have (on average 252.25) internal successors, (1009), 4 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:40,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 403 [2023-12-05 21:17:40,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:00,264 INFO L124 PetriNetUnfolderBase]: 60296/137859 cut-off events. [2023-12-05 21:18:00,264 INFO L125 PetriNetUnfolderBase]: For 288263/292274 co-relation queries the response was YES.