/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -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_37-indirect_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 05:19:41,589 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 05:19:41,659 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 [2023-11-30 05:19:41,694 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 05:19:41,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 05:19:41,696 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 05:19:41,696 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 05:19:41,697 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 05:19:41,697 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 05:19:41,700 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 05:19:41,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 05:19:41,701 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 05:19:41,701 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 05:19:41,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 05:19:41,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 05:19:41,702 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 05:19:41,702 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 05:19:41,703 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 05:19:41,703 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 05:19:41,703 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 05:19:41,703 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 05:19:41,704 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 05:19:41,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 05:19:41,705 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 05:19:41,705 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 05:19:41,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:19:41,706 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 05:19:41,706 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 05:19:41,707 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 05:19:41,707 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 05:19:41,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 05:19:41,708 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 05:19:41,708 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 05:19:41,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 05:19:41,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 05:19:41,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 05:19:41,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 05:19:41,962 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 05:19:41,963 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 05:19:41,964 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-30 05:19:43,136 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 05:19:43,422 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 05:19:43,422 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-30 05:19:43,438 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589a4fdba/d2a703eef1d6410ca71bcd949bde69f0/FLAG9a548f859 [2023-11-30 05:19:43,449 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589a4fdba/d2a703eef1d6410ca71bcd949bde69f0 [2023-11-30 05:19:43,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 05:19:43,452 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 05:19:43,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 05:19:43,454 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 05:19:43,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 05:19:43,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f729cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43, skipping insertion in model container [2023-11-30 05:19:43,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,512 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 05:19:43,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:19:43,824 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 05:19:43,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:19:43,894 INFO L206 MainTranslator]: Completed translation [2023-11-30 05:19:43,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43 WrapperNode [2023-11-30 05:19:43,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 05:19:43,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 05:19:43,897 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 05:19:43,897 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 05:19:43,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,929 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,952 INFO L138 Inliner]: procedures = 171, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2023-11-30 05:19:43,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 05:19:43,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 05:19:43,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 05:19:43,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 05:19:43,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,973 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,978 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,983 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,986 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,987 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,989 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,991 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 05:19:43,992 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 05:19:43,992 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 05:19:43,992 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 05:19:43,993 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (1/1) ... [2023-11-30 05:19:43,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:19:44,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:19:44,037 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) [2023-11-30 05:19:44,039 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 [2023-11-30 05:19:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 05:19:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 05:19:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-30 05:19:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 05:19:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 05:19:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-30 05:19:44,060 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-30 05:19:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 05:19:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 05:19:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-30 05:19:44,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 05:19:44,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 05:19:44,062 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-30 05:19:44,171 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 05:19:44,173 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 05:19:44,410 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 05:19:44,437 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 05:19:44,437 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-30 05:19:44,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:19:44 BoogieIcfgContainer [2023-11-30 05:19:44,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 05:19:44,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 05:19:44,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 05:19:44,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 05:19:44,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 05:19:43" (1/3) ... [2023-11-30 05:19:44,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366c0b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:19:44, skipping insertion in model container [2023-11-30 05:19:44,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:19:43" (2/3) ... [2023-11-30 05:19:44,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366c0b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:19:44, skipping insertion in model container [2023-11-30 05:19:44,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:19:44" (3/3) ... [2023-11-30 05:19:44,447 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-11-30 05:19:44,464 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 05:19:44,464 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-30 05:19:44,464 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 05:19:44,546 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-30 05:19:44,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 134 transitions, 275 flow [2023-11-30 05:19:44,726 INFO L124 PetriNetUnfolderBase]: 19/182 cut-off events. [2023-11-30 05:19:44,726 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-30 05:19:44,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 182 events. 19/182 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 596 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2023-11-30 05:19:44,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 134 transitions, 275 flow [2023-11-30 05:19:44,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 134 transitions, 275 flow [2023-11-30 05:19:44,755 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:19:44,761 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;@7b27dfd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:19:44,761 INFO L363 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-30 05:19:44,770 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:19:44,770 INFO L124 PetriNetUnfolderBase]: 1/40 cut-off events. [2023-11-30 05:19:44,770 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:19:44,771 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:44,771 INFO L232 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, 1, 1] [2023-11-30 05:19:44,772 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-30 05:19:44,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash -765225663, now seen corresponding path program 1 times [2023-11-30 05:19:44,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:44,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335750797] [2023-11-30 05:19:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:44,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:45,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:45,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335750797] [2023-11-30 05:19:45,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335750797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:19:45,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:19:45,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:19:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959483597] [2023-11-30 05:19:45,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:19:45,131 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:19:45,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:45,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:19:45,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:19:45,157 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 134 [2023-11-30 05:19:45,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2023-11-30 05:19:45,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:45,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 134 [2023-11-30 05:19:45,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:45,421 INFO L124 PetriNetUnfolderBase]: 155/666 cut-off events. [2023-11-30 05:19:45,422 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-30 05:19:45,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 666 events. 155/666 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4292 event pairs, 112 based on Foata normal form. 122/673 useless extension candidates. Maximal degree in co-relation 924. Up to 257 conditions per place. [2023-11-30 05:19:45,429 INFO L140 encePairwiseOnDemand]: 118/134 looper letters, 44 selfloop transitions, 2 changer transitions 3/131 dead transitions. [2023-11-30 05:19:45,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 131 transitions, 367 flow [2023-11-30 05:19:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:19:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:19:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-11-30 05:19:45,447 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7985074626865671 [2023-11-30 05:19:45,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-11-30 05:19:45,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-11-30 05:19:45,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:45,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-11-30 05:19:45,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2023-11-30 05:19:45,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-11-30 05:19:45,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2023-11-30 05:19:45,469 INFO L307 CegarLoopForPetriNet]: 124 programPoint places, -3 predicate places. [2023-11-30 05:19:45,470 INFO L500 AbstractCegarLoop]: Abstraction has has 121 places, 131 transitions, 367 flow [2023-11-30 05:19:45,471 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2023-11-30 05:19:45,471 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:45,471 INFO L232 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, 1, 1] [2023-11-30 05:19:45,471 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 05:19:45,472 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-30 05:19:45,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -765225662, now seen corresponding path program 1 times [2023-11-30 05:19:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:45,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182818575] [2023-11-30 05:19:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:45,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:45,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:45,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182818575] [2023-11-30 05:19:45,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182818575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:19:45,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:19:45,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:19:45,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861875699] [2023-11-30 05:19:45,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:19:45,741 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:19:45,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:45,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:19:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:19:45,745 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 134 [2023-11-30 05:19:45,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 131 transitions, 367 flow. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 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) [2023-11-30 05:19:45,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:45,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 134 [2023-11-30 05:19:45,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:45,978 INFO L124 PetriNetUnfolderBase]: 278/1058 cut-off events. [2023-11-30 05:19:45,978 INFO L125 PetriNetUnfolderBase]: For 205/221 co-relation queries the response was YES. [2023-11-30 05:19:45,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2067 conditions, 1058 events. 278/1058 cut-off events. For 205/221 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7203 event pairs, 46 based on Foata normal form. 0/951 useless extension candidates. Maximal degree in co-relation 1960. Up to 424 conditions per place. [2023-11-30 05:19:45,988 INFO L140 encePairwiseOnDemand]: 128/134 looper letters, 70 selfloop transitions, 4 changer transitions 6/161 dead transitions. [2023-11-30 05:19:45,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 161 transitions, 629 flow [2023-11-30 05:19:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:19:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:19:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 388 transitions. [2023-11-30 05:19:45,991 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7238805970149254 [2023-11-30 05:19:45,991 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 388 transitions. [2023-11-30 05:19:45,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 388 transitions. [2023-11-30 05:19:45,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:45,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 388 transitions. [2023-11-30 05:19:45,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2023-11-30 05:19:45,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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) [2023-11-30 05:19:45,996 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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) [2023-11-30 05:19:45,997 INFO L307 CegarLoopForPetriNet]: 124 programPoint places, 0 predicate places. [2023-11-30 05:19:45,997 INFO L500 AbstractCegarLoop]: Abstraction has has 124 places, 161 transitions, 629 flow [2023-11-30 05:19:45,997 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 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) [2023-11-30 05:19:45,998 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:45,998 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:19:45,998 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 05:19:45,999 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-30 05:19:46,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:46,000 INFO L85 PathProgramCache]: Analyzing trace with hash -89460130, now seen corresponding path program 1 times [2023-11-30 05:19:46,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:46,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566811954] [2023-11-30 05:19:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:46,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:46,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:46,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566811954] [2023-11-30 05:19:46,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566811954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:19:46,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:19:46,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 05:19:46,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267897091] [2023-11-30 05:19:46,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:19:46,237 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 05:19:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 05:19:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-30 05:19:46,240 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 134 [2023-11-30 05:19:46,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 161 transitions, 629 flow. Second operand has 8 states, 8 states have (on average 75.375) internal successors, (603), 8 states have internal predecessors, (603), 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) [2023-11-30 05:19:46,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:46,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 134 [2023-11-30 05:19:46,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:46,665 INFO L124 PetriNetUnfolderBase]: 251/1054 cut-off events. [2023-11-30 05:19:46,666 INFO L125 PetriNetUnfolderBase]: For 671/671 co-relation queries the response was YES. [2023-11-30 05:19:46,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 1054 events. 251/1054 cut-off events. For 671/671 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6983 event pairs, 14 based on Foata normal form. 64/1039 useless extension candidates. Maximal degree in co-relation 2383. Up to 392 conditions per place. [2023-11-30 05:19:46,672 INFO L140 encePairwiseOnDemand]: 119/134 looper letters, 89 selfloop transitions, 13 changer transitions 12/186 dead transitions. [2023-11-30 05:19:46,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 186 transitions, 989 flow [2023-11-30 05:19:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-30 05:19:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-30 05:19:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 767 transitions. [2023-11-30 05:19:46,678 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6359867330016584 [2023-11-30 05:19:46,678 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 767 transitions. [2023-11-30 05:19:46,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 767 transitions. [2023-11-30 05:19:46,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:46,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 767 transitions. [2023-11-30 05:19:46,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 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) [2023-11-30 05:19:46,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 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) [2023-11-30 05:19:46,683 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 134.0) internal successors, (1340), 10 states have internal predecessors, (1340), 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) [2023-11-30 05:19:46,684 INFO L307 CegarLoopForPetriNet]: 124 programPoint places, 7 predicate places. [2023-11-30 05:19:46,685 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 186 transitions, 989 flow [2023-11-30 05:19:46,685 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.375) internal successors, (603), 8 states have internal predecessors, (603), 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) [2023-11-30 05:19:46,685 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:46,685 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:19:46,685 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-30 05:19:46,686 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-30 05:19:46,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash -89460129, now seen corresponding path program 1 times [2023-11-30 05:19:46,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:46,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054319063] [2023-11-30 05:19:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:46,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:46,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:46,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054319063] [2023-11-30 05:19:46,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054319063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:19:46,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:19:46,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 05:19:46,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026090491] [2023-11-30 05:19:46,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:19:46,963 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 05:19:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 05:19:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-30 05:19:46,965 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 134 [2023-11-30 05:19:46,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 186 transitions, 989 flow. Second operand has 8 states, 8 states have (on average 75.375) internal successors, (603), 8 states have internal predecessors, (603), 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) [2023-11-30 05:19:46,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:46,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 134 [2023-11-30 05:19:46,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:47,195 INFO L124 PetriNetUnfolderBase]: 163/762 cut-off events. [2023-11-30 05:19:47,197 INFO L125 PetriNetUnfolderBase]: For 1096/1096 co-relation queries the response was YES. [2023-11-30 05:19:47,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 762 events. 163/762 cut-off events. For 1096/1096 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4430 event pairs, 10 based on Foata normal form. 96/799 useless extension candidates. Maximal degree in co-relation 1982. Up to 264 conditions per place. [2023-11-30 05:19:47,201 INFO L140 encePairwiseOnDemand]: 119/134 looper letters, 39 selfloop transitions, 5 changer transitions 41/155 dead transitions. [2023-11-30 05:19:47,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 155 transitions, 969 flow [2023-11-30 05:19:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 05:19:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 05:19:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 574 transitions. [2023-11-30 05:19:47,204 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6119402985074627 [2023-11-30 05:19:47,204 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 574 transitions. [2023-11-30 05:19:47,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 574 transitions. [2023-11-30 05:19:47,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:47,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 574 transitions. [2023-11-30 05:19:47,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 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) [2023-11-30 05:19:47,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 134.0) internal successors, (1072), 8 states have internal predecessors, (1072), 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) [2023-11-30 05:19:47,208 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 134.0) internal successors, (1072), 8 states have internal predecessors, (1072), 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) [2023-11-30 05:19:47,210 INFO L307 CegarLoopForPetriNet]: 124 programPoint places, 4 predicate places. [2023-11-30 05:19:47,210 INFO L500 AbstractCegarLoop]: Abstraction has has 128 places, 155 transitions, 969 flow [2023-11-30 05:19:47,211 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.375) internal successors, (603), 8 states have internal predecessors, (603), 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) [2023-11-30 05:19:47,211 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:47,211 INFO L232 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:19:47,212 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 05:19:47,212 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-30 05:19:47,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:47,214 INFO L85 PathProgramCache]: Analyzing trace with hash -476711479, now seen corresponding path program 1 times [2023-11-30 05:19:47,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:47,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235475049] [2023-11-30 05:19:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:47,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:47,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235475049] [2023-11-30 05:19:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235475049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:19:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435279136] [2023-11-30 05:19:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:47,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:19:47,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:19:47,356 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) [2023-11-30 05:19:47,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-30 05:19:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:47,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:19:47,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:19:47,522 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 [2023-11-30 05:19:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:47,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:19:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:47,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435279136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:19:47,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:19:47,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-30 05:19:47,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051422016] [2023-11-30 05:19:47,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:19:47,810 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-30 05:19:47,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-30 05:19:47,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-30 05:19:47,812 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 134 [2023-11-30 05:19:47,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 155 transitions, 969 flow. Second operand has 14 states, 14 states have (on average 80.57142857142857) internal successors, (1128), 14 states have internal predecessors, (1128), 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) [2023-11-30 05:19:47,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:47,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 134 [2023-11-30 05:19:47,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:48,005 INFO L124 PetriNetUnfolderBase]: 50/208 cut-off events. [2023-11-30 05:19:48,005 INFO L125 PetriNetUnfolderBase]: For 551/553 co-relation queries the response was YES. [2023-11-30 05:19:48,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 208 events. 50/208 cut-off events. For 551/553 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 696 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 593. Up to 75 conditions per place. [2023-11-30 05:19:48,007 INFO L140 encePairwiseOnDemand]: 127/134 looper letters, 51 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2023-11-30 05:19:48,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 762 flow [2023-11-30 05:19:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 05:19:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 05:19:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 604 transitions. [2023-11-30 05:19:48,009 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6439232409381663 [2023-11-30 05:19:48,009 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 604 transitions. [2023-11-30 05:19:48,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 604 transitions. [2023-11-30 05:19:48,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:48,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 604 transitions. [2023-11-30 05:19:48,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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) [2023-11-30 05:19:48,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 134.0) internal successors, (1072), 8 states have internal predecessors, (1072), 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) [2023-11-30 05:19:48,013 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 134.0) internal successors, (1072), 8 states have internal predecessors, (1072), 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) [2023-11-30 05:19:48,014 INFO L307 CegarLoopForPetriNet]: 124 programPoint places, -28 predicate places. [2023-11-30 05:19:48,014 INFO L500 AbstractCegarLoop]: Abstraction has has 96 places, 103 transitions, 762 flow [2023-11-30 05:19:48,015 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.57142857142857) internal successors, (1128), 14 states have internal predecessors, (1128), 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) [2023-11-30 05:19:48,015 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:48,015 INFO L232 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:19:48,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-30 05:19:48,224 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:19:48,225 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-30 05:19:48,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1893153624, now seen corresponding path program 1 times [2023-11-30 05:19:48,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:48,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103141653] [2023-11-30 05:19:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:48,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:19:48,249 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:19:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:19:48,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:19:48,287 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:19:48,288 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2023-11-30 05:19:48,289 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-11-30 05:19:48,289 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-11-30 05:19:48,290 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-11-30 05:19:48,290 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-11-30 05:19:48,290 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-11-30 05:19:48,290 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-11-30 05:19:48,293 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-11-30 05:19:48,293 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-11-30 05:19:48,294 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2023-11-30 05:19:48,294 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2023-11-30 05:19:48,294 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2023-11-30 05:19:48,294 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-11-30 05:19:48,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-11-30 05:19:48,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2023-11-30 05:19:48,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-11-30 05:19:48,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-11-30 05:19:48,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-11-30 05:19:48,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-11-30 05:19:48,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-11-30 05:19:48,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2023-11-30 05:19:48,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-11-30 05:19:48,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-11-30 05:19:48,296 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-30 05:19:48,297 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-30 05:19:48,299 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:19:48,299 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-30 05:19:48,338 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-30 05:19:48,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 179 transitions, 374 flow [2023-11-30 05:19:48,373 INFO L124 PetriNetUnfolderBase]: 34/303 cut-off events. [2023-11-30 05:19:48,373 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-30 05:19:48,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 303 events. 34/303 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1147 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 184. Up to 8 conditions per place. [2023-11-30 05:19:48,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 179 transitions, 374 flow [2023-11-30 05:19:48,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 179 transitions, 374 flow [2023-11-30 05:19:48,380 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:19:48,381 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;@7b27dfd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:19:48,382 INFO L363 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-30 05:19:48,385 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:19:48,385 INFO L124 PetriNetUnfolderBase]: 1/40 cut-off events. [2023-11-30 05:19:48,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:19:48,385 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:48,385 INFO L232 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, 1, 1] [2023-11-30 05:19:48,385 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 05:19:48,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:48,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2138465684, now seen corresponding path program 1 times [2023-11-30 05:19:48,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:48,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914489844] [2023-11-30 05:19:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:48,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:48,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:48,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914489844] [2023-11-30 05:19:48,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914489844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:19:48,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:19:48,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:19:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425893687] [2023-11-30 05:19:48,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:19:48,446 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:19:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:48,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:19:48,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:19:48,448 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 179 [2023-11-30 05:19:48,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 179 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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) [2023-11-30 05:19:48,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:48,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 179 [2023-11-30 05:19:48,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:50,704 INFO L124 PetriNetUnfolderBase]: 5127/12592 cut-off events. [2023-11-30 05:19:50,705 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-11-30 05:19:50,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20805 conditions, 12592 events. 5127/12592 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 127371 event pairs, 3738 based on Foata normal form. 2666/12726 useless extension candidates. Maximal degree in co-relation 1667. Up to 5997 conditions per place. [2023-11-30 05:19:50,801 INFO L140 encePairwiseOnDemand]: 157/179 looper letters, 77 selfloop transitions, 2 changer transitions 0/184 dead transitions. [2023-11-30 05:19:50,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 184 transitions, 542 flow [2023-11-30 05:19:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:19:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:19:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-11-30 05:19:50,803 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8044692737430168 [2023-11-30 05:19:50,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-11-30 05:19:50,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-11-30 05:19:50,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:50,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-11-30 05:19:50,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2023-11-30 05:19:50,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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) [2023-11-30 05:19:50,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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) [2023-11-30 05:19:50,807 INFO L307 CegarLoopForPetriNet]: 164 programPoint places, -3 predicate places. [2023-11-30 05:19:50,807 INFO L500 AbstractCegarLoop]: Abstraction has has 161 places, 184 transitions, 542 flow [2023-11-30 05:19:50,807 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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) [2023-11-30 05:19:50,808 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:50,808 INFO L232 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, 1, 1] [2023-11-30 05:19:50,808 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-30 05:19:50,808 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 05:19:50,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2138465685, now seen corresponding path program 1 times [2023-11-30 05:19:50,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:50,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114608793] [2023-11-30 05:19:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:50,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:50,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:50,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114608793] [2023-11-30 05:19:50,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114608793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:19:50,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:19:50,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:19:50,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499580970] [2023-11-30 05:19:50,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:19:50,870 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:19:50,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:50,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:19:50,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:19:50,871 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 179 [2023-11-30 05:19:50,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 184 transitions, 542 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 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) [2023-11-30 05:19:50,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:50,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 179 [2023-11-30 05:19:50,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:54,023 INFO L124 PetriNetUnfolderBase]: 11592/26712 cut-off events. [2023-11-30 05:19:54,023 INFO L125 PetriNetUnfolderBase]: For 6413/6889 co-relation queries the response was YES. [2023-11-30 05:19:54,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56955 conditions, 26712 events. 11592/26712 cut-off events. For 6413/6889 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 283784 event pairs, 5390 based on Foata normal form. 0/23792 useless extension candidates. Maximal degree in co-relation 6171. Up to 14005 conditions per place. [2023-11-30 05:19:54,283 INFO L140 encePairwiseOnDemand]: 173/179 looper letters, 118 selfloop transitions, 4 changer transitions 0/230 dead transitions. [2023-11-30 05:19:54,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 230 transitions, 940 flow [2023-11-30 05:19:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:19:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:19:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-11-30 05:19:54,286 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7150837988826816 [2023-11-30 05:19:54,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-11-30 05:19:54,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-11-30 05:19:54,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:54,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-11-30 05:19:54,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 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) [2023-11-30 05:19:54,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 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) [2023-11-30 05:19:54,289 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 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) [2023-11-30 05:19:54,290 INFO L307 CegarLoopForPetriNet]: 164 programPoint places, 0 predicate places. [2023-11-30 05:19:54,290 INFO L500 AbstractCegarLoop]: Abstraction has has 164 places, 230 transitions, 940 flow [2023-11-30 05:19:54,290 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 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) [2023-11-30 05:19:54,290 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:54,290 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:19:54,290 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-30 05:19:54,290 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 05:19:54,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1879052967, now seen corresponding path program 1 times [2023-11-30 05:19:54,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:54,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151465234] [2023-11-30 05:19:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:54,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:54,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151465234] [2023-11-30 05:19:54,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151465234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:19:54,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:19:54,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 05:19:54,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486820711] [2023-11-30 05:19:54,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:19:54,546 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 05:19:54,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 05:19:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-30 05:19:54,547 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 179 [2023-11-30 05:19:54,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 230 transitions, 940 flow. Second operand has 8 states, 8 states have (on average 94.375) internal successors, (755), 8 states have internal predecessors, (755), 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) [2023-11-30 05:19:54,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:54,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 179 [2023-11-30 05:19:54,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:55,849 INFO L124 PetriNetUnfolderBase]: 3642/9650 cut-off events. [2023-11-30 05:19:55,849 INFO L125 PetriNetUnfolderBase]: For 7127/7127 co-relation queries the response was YES. [2023-11-30 05:19:55,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25907 conditions, 9650 events. 3642/9650 cut-off events. For 7127/7127 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 91640 event pairs, 1360 based on Foata normal form. 2848/11690 useless extension candidates. Maximal degree in co-relation 2202. Up to 5027 conditions per place. [2023-11-30 05:19:55,915 INFO L140 encePairwiseOnDemand]: 155/179 looper letters, 51 selfloop transitions, 5 changer transitions 45/192 dead transitions. [2023-11-30 05:19:55,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 192 transitions, 986 flow [2023-11-30 05:19:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 05:19:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 05:19:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 746 transitions. [2023-11-30 05:19:55,918 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5953711093375897 [2023-11-30 05:19:55,918 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 746 transitions. [2023-11-30 05:19:55,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 746 transitions. [2023-11-30 05:19:55,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:55,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 746 transitions. [2023-11-30 05:19:55,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.57142857142857) internal successors, (746), 7 states have internal predecessors, (746), 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) [2023-11-30 05:19:55,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 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) [2023-11-30 05:19:55,924 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 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) [2023-11-30 05:19:55,926 INFO L307 CegarLoopForPetriNet]: 164 programPoint places, -12 predicate places. [2023-11-30 05:19:55,926 INFO L500 AbstractCegarLoop]: Abstraction has has 152 places, 192 transitions, 986 flow [2023-11-30 05:19:55,927 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 94.375) internal successors, (755), 8 states have internal predecessors, (755), 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) [2023-11-30 05:19:55,927 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:55,927 INFO L232 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:19:55,927 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-30 05:19:55,927 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 05:19:55,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:55,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1478769265, now seen corresponding path program 1 times [2023-11-30 05:19:55,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:55,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124320429] [2023-11-30 05:19:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:55,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124320429] [2023-11-30 05:19:56,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124320429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:19:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784541403] [2023-11-30 05:19:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:56,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:19:56,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:19:56,057 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) [2023-11-30 05:19:56,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-30 05:19:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:56,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:19:56,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:19:56,145 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 [2023-11-30 05:19:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:56,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:19:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:56,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784541403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:19:56,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:19:56,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-30 05:19:56,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139589347] [2023-11-30 05:19:56,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:19:56,361 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-30 05:19:56,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:56,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-30 05:19:56,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-30 05:19:56,364 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2023-11-30 05:19:56,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 192 transitions, 986 flow. Second operand has 14 states, 14 states have (on average 103.57142857142857) internal successors, (1450), 14 states have internal predecessors, (1450), 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) [2023-11-30 05:19:56,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:56,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2023-11-30 05:19:56,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:56,976 INFO L124 PetriNetUnfolderBase]: 1260/2757 cut-off events. [2023-11-30 05:19:56,976 INFO L125 PetriNetUnfolderBase]: For 5149/5175 co-relation queries the response was YES. [2023-11-30 05:19:56,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9863 conditions, 2757 events. 1260/2757 cut-off events. For 5149/5175 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 19049 event pairs, 0 based on Foata normal form. 0/2756 useless extension candidates. Maximal degree in co-relation 855. Up to 1889 conditions per place. [2023-11-30 05:19:56,997 INFO L140 encePairwiseOnDemand]: 172/179 looper letters, 124 selfloop transitions, 8 changer transitions 0/198 dead transitions. [2023-11-30 05:19:56,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 198 transitions, 1434 flow [2023-11-30 05:19:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 05:19:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 05:19:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1146 transitions. [2023-11-30 05:19:57,000 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6402234636871509 [2023-11-30 05:19:57,001 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1146 transitions. [2023-11-30 05:19:57,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1146 transitions. [2023-11-30 05:19:57,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:57,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1146 transitions. [2023-11-30 05:19:57,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 114.6) internal successors, (1146), 10 states have internal predecessors, (1146), 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) [2023-11-30 05:19:57,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 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) [2023-11-30 05:19:57,007 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 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) [2023-11-30 05:19:57,008 INFO L307 CegarLoopForPetriNet]: 164 programPoint places, -38 predicate places. [2023-11-30 05:19:57,008 INFO L500 AbstractCegarLoop]: Abstraction has has 126 places, 198 transitions, 1434 flow [2023-11-30 05:19:57,008 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 103.57142857142857) internal successors, (1450), 14 states have internal predecessors, (1450), 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) [2023-11-30 05:19:57,008 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:57,009 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 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, 1, 1, 1] [2023-11-30 05:19:57,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-30 05:19:57,214 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,SelfDestructingSolverStorable9 [2023-11-30 05:19:57,214 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 05:19:57,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:57,215 INFO L85 PathProgramCache]: Analyzing trace with hash -468217277, now seen corresponding path program 1 times [2023-11-30 05:19:57,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:57,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33693094] [2023-11-30 05:19:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:57,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:19:57,238 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:19:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:19:57,253 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:19:57,253 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:19:57,253 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2023-11-30 05:19:57,254 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2023-11-30 05:19:57,254 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2023-11-30 05:19:57,254 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2023-11-30 05:19:57,254 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2023-11-30 05:19:57,254 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 31 remaining) [2023-11-30 05:19:57,254 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 31 remaining) [2023-11-30 05:19:57,255 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2023-11-30 05:19:57,255 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2023-11-30 05:19:57,255 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2023-11-30 05:19:57,255 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2023-11-30 05:19:57,255 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2023-11-30 05:19:57,255 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2023-11-30 05:19:57,255 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2023-11-30 05:19:57,255 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2023-11-30 05:19:57,255 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2023-11-30 05:19:57,256 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2023-11-30 05:19:57,256 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2023-11-30 05:19:57,256 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2023-11-30 05:19:57,256 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2023-11-30 05:19:57,256 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2023-11-30 05:19:57,256 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2023-11-30 05:19:57,256 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2023-11-30 05:19:57,256 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 31 remaining) [2023-11-30 05:19:57,256 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2023-11-30 05:19:57,257 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2023-11-30 05:19:57,257 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2023-11-30 05:19:57,258 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2023-11-30 05:19:57,258 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2023-11-30 05:19:57,258 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2023-11-30 05:19:57,259 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2023-11-30 05:19:57,259 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-30 05:19:57,259 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-30 05:19:57,260 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:19:57,260 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-30 05:19:57,295 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-30 05:19:57,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 224 transitions, 475 flow [2023-11-30 05:19:57,342 INFO L124 PetriNetUnfolderBase]: 54/463 cut-off events. [2023-11-30 05:19:57,343 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-30 05:19:57,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 463 events. 54/463 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1904 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 311. Up to 16 conditions per place. [2023-11-30 05:19:57,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 224 transitions, 475 flow [2023-11-30 05:19:57,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 224 transitions, 475 flow [2023-11-30 05:19:57,354 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:19:57,354 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;@7b27dfd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:19:57,354 INFO L363 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-30 05:19:57,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:19:57,358 INFO L124 PetriNetUnfolderBase]: 2/43 cut-off events. [2023-11-30 05:19:57,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:19:57,358 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:57,358 INFO L232 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, 1, 1] [2023-11-30 05:19:57,358 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-30 05:19:57,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1525156468, now seen corresponding path program 1 times [2023-11-30 05:19:57,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:57,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301174072] [2023-11-30 05:19:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:57,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:19:57,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:57,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301174072] [2023-11-30 05:19:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301174072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:19:57,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:19:57,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:19:57,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817498043] [2023-11-30 05:19:57,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:19:57,400 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:19:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:19:57,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:19:57,402 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 224 [2023-11-30 05:19:57,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 224 transitions, 475 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2023-11-30 05:19:57,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:57,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 224 [2023-11-30 05:19:57,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:20:21,953 INFO L124 PetriNetUnfolderBase]: 121612/237227 cut-off events. [2023-11-30 05:20:21,953 INFO L125 PetriNetUnfolderBase]: For 4141/4141 co-relation queries the response was YES. [2023-11-30 05:20:22,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407062 conditions, 237227 events. 121612/237227 cut-off events. For 4141/4141 co-relation queries the response was YES. Maximal size of possible extension queue 6827. Compared 2920174 event pairs, 88635 based on Foata normal form. 53030/238994 useless extension candidates. Maximal degree in co-relation 20786. Up to 123340 conditions per place. [2023-11-30 05:20:24,259 INFO L140 encePairwiseOnDemand]: 196/224 looper letters, 107 selfloop transitions, 2 changer transitions 0/237 dead transitions. [2023-11-30 05:20:24,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 237 transitions, 719 flow [2023-11-30 05:20:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:20:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:20:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-11-30 05:20:24,262 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8080357142857143 [2023-11-30 05:20:24,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-11-30 05:20:24,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-11-30 05:20:24,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:20:24,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-11-30 05:20:24,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 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) [2023-11-30 05:20:24,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2023-11-30 05:20:24,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2023-11-30 05:20:24,266 INFO L307 CegarLoopForPetriNet]: 204 programPoint places, -3 predicate places. [2023-11-30 05:20:24,266 INFO L500 AbstractCegarLoop]: Abstraction has has 201 places, 237 transitions, 719 flow [2023-11-30 05:20:24,267 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2023-11-30 05:20:24,267 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:20:24,267 INFO L232 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, 1, 1] [2023-11-30 05:20:24,267 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-30 05:20:24,267 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-30 05:20:24,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:20:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1525156469, now seen corresponding path program 1 times [2023-11-30 05:20:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:20:24,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425389777] [2023-11-30 05:20:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:20:24,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:20:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:20:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:20:24,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:20:24,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425389777] [2023-11-30 05:20:24,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425389777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:20:24,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:20:24,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:20:24,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854313804] [2023-11-30 05:20:24,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:20:24,329 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:20:24,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:20:24,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:20:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:20:24,330 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 224 [2023-11-30 05:20:24,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 237 transitions, 719 flow. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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) [2023-11-30 05:20:24,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:20:24,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 224 [2023-11-30 05:20:24,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:21:32,482 INFO L124 PetriNetUnfolderBase]: 333239/597911 cut-off events. [2023-11-30 05:21:32,483 INFO L125 PetriNetUnfolderBase]: For 152825/160685 co-relation queries the response was YES. [2023-11-30 05:21:35,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1357108 conditions, 597911 events. 333239/597911 cut-off events. For 152825/160685 co-relation queries the response was YES. Maximal size of possible extension queue 15145. Compared 7445202 event pairs, 195273 based on Foata normal form. 0/566674 useless extension candidates. Maximal degree in co-relation 56695. Up to 340095 conditions per place. [2023-11-30 05:21:41,219 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 158 selfloop transitions, 4 changer transitions 0/297 dead transitions. [2023-11-30 05:21:41,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 297 transitions, 1245 flow [2023-11-30 05:21:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:21:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:21:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 634 transitions. [2023-11-30 05:21:41,242 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7075892857142857 [2023-11-30 05:21:41,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 634 transitions. [2023-11-30 05:21:41,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 634 transitions. [2023-11-30 05:21:41,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:21:41,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 634 transitions. [2023-11-30 05:21:41,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 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) [2023-11-30 05:21:41,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 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) [2023-11-30 05:21:41,246 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 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) [2023-11-30 05:21:41,260 INFO L307 CegarLoopForPetriNet]: 204 programPoint places, 0 predicate places. [2023-11-30 05:21:41,260 INFO L500 AbstractCegarLoop]: Abstraction has has 204 places, 297 transitions, 1245 flow [2023-11-30 05:21:41,261 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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) [2023-11-30 05:21:41,261 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:21:41,261 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:21:41,261 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-30 05:21:41,261 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-30 05:21:41,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:21:41,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1723123986, now seen corresponding path program 1 times [2023-11-30 05:21:41,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:21:41,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383069506] [2023-11-30 05:21:41,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:21:41,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:21:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:21:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:21:41,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:21:41,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383069506] [2023-11-30 05:21:41,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383069506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:21:41,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:21:41,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 05:21:41,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551421519] [2023-11-30 05:21:41,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:21:41,461 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 05:21:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:21:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 05:21:41,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-30 05:21:41,477 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 224 [2023-11-30 05:21:41,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 297 transitions, 1245 flow. Second operand has 8 states, 8 states have (on average 113.375) internal successors, (907), 8 states have internal predecessors, (907), 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) [2023-11-30 05:21:41,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:21:41,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 224 [2023-11-30 05:21:41,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:22:01,540 INFO L124 PetriNetUnfolderBase]: 63587/129303 cut-off events. [2023-11-30 05:22:01,540 INFO L125 PetriNetUnfolderBase]: For 80905/84293 co-relation queries the response was YES. [2023-11-30 05:22:02,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381420 conditions, 129303 events. 63587/129303 cut-off events. For 80905/84293 co-relation queries the response was YES. Maximal size of possible extension queue 2848. Compared 1491570 event pairs, 32751 based on Foata normal form. 53870/177020 useless extension candidates. Maximal degree in co-relation 25780. Up to 76458 conditions per place. [2023-11-30 05:22:02,921 INFO L140 encePairwiseOnDemand]: 192/224 looper letters, 63 selfloop transitions, 5 changer transitions 65/243 dead transitions. [2023-11-30 05:22:02,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 243 transitions, 1291 flow [2023-11-30 05:22:02,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 05:22:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 05:22:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 917 transitions. [2023-11-30 05:22:02,924 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5848214285714286 [2023-11-30 05:22:02,924 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 917 transitions. [2023-11-30 05:22:02,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 917 transitions. [2023-11-30 05:22:02,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:22:02,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 917 transitions. [2023-11-30 05:22:02,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 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) [2023-11-30 05:22:02,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 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) [2023-11-30 05:22:02,943 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 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) [2023-11-30 05:22:02,944 INFO L307 CegarLoopForPetriNet]: 204 programPoint places, -20 predicate places. [2023-11-30 05:22:02,944 INFO L500 AbstractCegarLoop]: Abstraction has has 184 places, 243 transitions, 1291 flow [2023-11-30 05:22:02,945 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 113.375) internal successors, (907), 8 states have internal predecessors, (907), 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) [2023-11-30 05:22:02,945 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:22:02,946 INFO L232 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:22:02,946 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-30 05:22:02,946 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-30 05:22:02,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:22:02,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1659229062, now seen corresponding path program 1 times [2023-11-30 05:22:02,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:22:02,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60119776] [2023-11-30 05:22:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:22:02,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:22:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:22:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:22:03,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:22:03,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60119776] [2023-11-30 05:22:03,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60119776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:22:03,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592015699] [2023-11-30 05:22:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:22:03,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:22:03,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:22:03,124 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) [2023-11-30 05:22:03,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-30 05:22:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:22:03,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:22:03,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:22:03,255 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 [2023-11-30 05:22:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:22:03,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:22:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:22:03,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592015699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:22:03,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:22:03,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-30 05:22:03,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234312715] [2023-11-30 05:22:03,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:22:03,469 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-30 05:22:03,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:22:03,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-30 05:22:03,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-30 05:22:03,472 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 224 [2023-11-30 05:22:03,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 243 transitions, 1291 flow. Second operand has 11 states, 11 states have (on average 126.72727272727273) internal successors, (1394), 11 states have internal predecessors, (1394), 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) [2023-11-30 05:22:03,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:22:03,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 224 [2023-11-30 05:22:03,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:22:24,466 INFO L124 PetriNetUnfolderBase]: 67156/135024 cut-off events. [2023-11-30 05:22:24,466 INFO L125 PetriNetUnfolderBase]: For 153372/157510 co-relation queries the response was YES. [2023-11-30 05:22:24,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490816 conditions, 135024 events. 67156/135024 cut-off events. For 153372/157510 co-relation queries the response was YES. Maximal size of possible extension queue 2666. Compared 1537377 event pairs, 2432 based on Foata normal form. 0/126607 useless extension candidates. Maximal degree in co-relation 32852. Up to 79851 conditions per place. [2023-11-30 05:22:25,940 INFO L140 encePairwiseOnDemand]: 214/224 looper letters, 180 selfloop transitions, 11 changer transitions 65/363 dead transitions. [2023-11-30 05:22:25,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 363 transitions, 2723 flow [2023-11-30 05:22:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 05:22:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 05:22:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1467 transitions. [2023-11-30 05:22:25,943 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6549107142857142 [2023-11-30 05:22:25,943 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1467 transitions. [2023-11-30 05:22:25,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1467 transitions. [2023-11-30 05:22:25,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:22:25,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1467 transitions. [2023-11-30 05:22:25,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 146.7) internal successors, (1467), 10 states have internal predecessors, (1467), 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) [2023-11-30 05:22:25,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 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) [2023-11-30 05:22:25,952 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 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) [2023-11-30 05:22:25,953 INFO L307 CegarLoopForPetriNet]: 204 programPoint places, -11 predicate places. [2023-11-30 05:22:25,953 INFO L500 AbstractCegarLoop]: Abstraction has has 193 places, 363 transitions, 2723 flow [2023-11-30 05:22:25,953 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 126.72727272727273) internal successors, (1394), 11 states have internal predecessors, (1394), 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) [2023-11-30 05:22:25,953 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:22:25,954 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:22:25,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-30 05:22:26,158 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:22:26,158 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-30 05:22:26,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:22:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1396143483, now seen corresponding path program 1 times [2023-11-30 05:22:26,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:22:26,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768917661] [2023-11-30 05:22:26,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:22:26,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:22:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:22:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:22:26,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:22:26,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768917661] [2023-11-30 05:22:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768917661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:22:26,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836948560] [2023-11-30 05:22:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:22:26,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:22:26,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:22:26,505 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) [2023-11-30 05:22:26,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-30 05:22:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:22:26,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-30 05:22:26,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:22:26,651 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 [2023-11-30 05:22:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:22:27,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:22:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:22:27,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836948560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:22:27,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:22:27,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-11-30 05:22:27,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108479188] [2023-11-30 05:22:27,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:22:27,589 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-30 05:22:27,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:22:27,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-30 05:22:27,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-11-30 05:22:27,592 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 224 [2023-11-30 05:22:27,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 363 transitions, 2723 flow. Second operand has 27 states, 27 states have (on average 126.66666666666667) internal successors, (3420), 27 states have internal predecessors, (3420), 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) [2023-11-30 05:22:27,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:22:27,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 224 [2023-11-30 05:22:27,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:22:33,734 INFO L124 PetriNetUnfolderBase]: 21830/38089 cut-off events. [2023-11-30 05:22:33,734 INFO L125 PetriNetUnfolderBase]: For 90899/91431 co-relation queries the response was YES. [2023-11-30 05:22:33,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178544 conditions, 38089 events. 21830/38089 cut-off events. For 90899/91431 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 328535 event pairs, 0 based on Foata normal form. 24/38113 useless extension candidates. Maximal degree in co-relation 11869. Up to 29114 conditions per place. [2023-11-30 05:22:34,180 INFO L140 encePairwiseOnDemand]: 217/224 looper letters, 257 selfloop transitions, 11 changer transitions 0/353 dead transitions. [2023-11-30 05:22:34,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 353 transitions, 3358 flow [2023-11-30 05:22:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-30 05:22:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-30 05:22:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1853 transitions. [2023-11-30 05:22:34,184 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6363324175824175 [2023-11-30 05:22:34,184 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1853 transitions. [2023-11-30 05:22:34,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1853 transitions. [2023-11-30 05:22:34,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:22:34,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1853 transitions. [2023-11-30 05:22:34,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.53846153846155) internal successors, (1853), 13 states have internal predecessors, (1853), 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) [2023-11-30 05:22:34,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 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) [2023-11-30 05:22:34,193 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 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) [2023-11-30 05:22:34,194 INFO L307 CegarLoopForPetriNet]: 204 programPoint places, -34 predicate places. [2023-11-30 05:22:34,194 INFO L500 AbstractCegarLoop]: Abstraction has has 170 places, 353 transitions, 3358 flow [2023-11-30 05:22:34,220 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 126.66666666666667) internal successors, (3420), 27 states have internal predecessors, (3420), 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) [2023-11-30 05:22:34,220 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:22:34,221 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:22:34,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-30 05:22:34,432 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-30 05:22:34,432 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-30 05:22:34,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:22:34,433 INFO L85 PathProgramCache]: Analyzing trace with hash -330774187, now seen corresponding path program 1 times [2023-11-30 05:22:34,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:22:34,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906232873] [2023-11-30 05:22:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:22:34,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:22:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:22:34,469 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:22:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:22:34,511 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:22:34,511 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:22:34,511 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-11-30 05:22:34,512 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-11-30 05:22:34,528 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-11-30 05:22:34,528 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-11-30 05:22:34,528 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-11-30 05:22:34,528 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-11-30 05:22:34,528 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 39 remaining) [2023-11-30 05:22:34,529 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 39 remaining) [2023-11-30 05:22:34,530 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-11-30 05:22:34,531 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 39 remaining) [2023-11-30 05:22:34,531 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-30 05:22:34,532 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-30 05:22:34,532 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:22:34,532 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-30 05:22:34,576 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-30 05:22:34,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 269 transitions, 578 flow [2023-11-30 05:22:34,700 INFO L124 PetriNetUnfolderBase]: 86/703 cut-off events. [2023-11-30 05:22:34,700 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-30 05:22:34,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 703 events. 86/703 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3217 event pairs, 6 based on Foata normal form. 0/533 useless extension candidates. Maximal degree in co-relation 483. Up to 32 conditions per place. [2023-11-30 05:22:34,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 269 transitions, 578 flow [2023-11-30 05:22:34,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 269 transitions, 578 flow [2023-11-30 05:22:34,740 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:22:34,741 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;@7b27dfd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:22:34,741 INFO L363 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-11-30 05:22:34,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:22:34,743 INFO L124 PetriNetUnfolderBase]: 2/43 cut-off events. [2023-11-30 05:22:34,743 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:22:34,744 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:22:34,744 INFO L232 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, 1, 1] [2023-11-30 05:22:34,744 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-11-30 05:22:34,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:22:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1689813985, now seen corresponding path program 1 times [2023-11-30 05:22:34,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:22:34,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319357145] [2023-11-30 05:22:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:22:34,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:22:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:22:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:22:34,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:22:34,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319357145] [2023-11-30 05:22:34,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319357145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:22:34,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:22:34,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:22:34,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261898560] [2023-11-30 05:22:34,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:22:34,798 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:22:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:22:34,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:22:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:22:34,802 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 269 [2023-11-30 05:22:34,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 269 transitions, 578 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2023-11-30 05:22:34,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:22:34,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 269 [2023-11-30 05:22:34,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand