/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:18:23,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:18:23,855 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:18:23,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:18:23,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:18:23,871 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:18:23,871 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:18:23,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:18:23,872 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:18:23,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:18:23,872 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:18:23,872 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:18:23,873 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:18:23,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:18:23,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:18:23,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:18:23,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:18:23,874 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:18:23,874 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:18:23,874 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:18:23,874 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:18:23,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:18:23,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:18:23,878 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:18:23,880 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:18:23,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:18:23,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:18:23,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:18:23,881 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:18:23,881 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:18:23,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:18:23,882 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:18:23,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:18:23,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:18:24,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:18:24,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:18:24,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:18:24,118 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:18:24,119 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:18:24,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-12-05 21:18:25,152 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:18:25,363 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:18:25,364 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_86-lists_racing.i [2023-12-05 21:18:25,383 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece9c86c7/2dca7550a4164ca78d7be7123ca8ee40/FLAGc97e5cf42 [2023-12-05 21:18:25,395 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece9c86c7/2dca7550a4164ca78d7be7123ca8ee40 [2023-12-05 21:18:25,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:18:25,398 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:18:25,400 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:18:25,401 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:18:25,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:18:25,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:25,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21cb1064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25, skipping insertion in model container [2023-12-05 21:18:25,408 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:25,451 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:18:25,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:18:25,859 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:18:25,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:18:25,952 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:18:25,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25 WrapperNode [2023-12-05 21:18:25,953 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:18:25,954 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:18:25,954 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:18:25,954 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:18:25,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:25,985 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,012 INFO L138 Inliner]: procedures = 279, calls = 70, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 269 [2023-12-05 21:18:26,013 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:18:26,013 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:18:26,013 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:18:26,013 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:18:26,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,052 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,052 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,059 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,071 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:18:26,072 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:18:26,072 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:18:26,072 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:18:26,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (1/1) ... [2023-12-05 21:18:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:18:26,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:26,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:18:26,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:18:26,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:18:26,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-05 21:18:26,148 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-12-05 21:18:26,148 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-12-05 21:18:26,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:18:26,148 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:18:26,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:18:26,149 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-12-05 21:18:26,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-12-05 21:18:26,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:18:26,149 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:18:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-05 21:18:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:18:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-05 21:18:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:18:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:18:26,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:18:26,152 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:18:26,270 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:18:26,272 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:18:26,664 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:18:26,690 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:18:26,690 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-12-05 21:18:26,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:18:26 BoogieIcfgContainer [2023-12-05 21:18:26,691 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:18:26,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:18:26,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:18:26,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:18:26,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:18:25" (1/3) ... [2023-12-05 21:18:26,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724ae72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:18:26, skipping insertion in model container [2023-12-05 21:18:26,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:25" (2/3) ... [2023-12-05 21:18:26,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724ae72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:18:26, skipping insertion in model container [2023-12-05 21:18:26,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:18:26" (3/3) ... [2023-12-05 21:18:26,702 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-12-05 21:18:26,715 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:18:26,716 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-12-05 21:18:26,716 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:18:26,806 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-12-05 21:18:26,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 299 places, 323 transitions, 666 flow [2023-12-05 21:18:27,005 INFO L124 PetriNetUnfolderBase]: 61/603 cut-off events. [2023-12-05 21:18:27,006 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-12-05 21:18:27,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 603 events. 61/603 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2666 event pairs, 0 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 300. Up to 8 conditions per place. [2023-12-05 21:18:27,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 323 transitions, 666 flow [2023-12-05 21:18:27,030 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 323 transitions, 666 flow [2023-12-05 21:18:27,043 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:18:27,048 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;@73e5a55b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:18:27,049 INFO L363 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-12-05 21:18:27,054 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:18:27,054 INFO L124 PetriNetUnfolderBase]: 3/52 cut-off events. [2023-12-05 21:18:27,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:18:27,054 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:27,055 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:27,055 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:27,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash 85178761, now seen corresponding path program 1 times [2023-12-05 21:18:27,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:27,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485417562] [2023-12-05 21:18:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:27,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:27,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485417562] [2023-12-05 21:18:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485417562] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:27,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:27,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:18:27,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155349808] [2023-12-05 21:18:27,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:27,323 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:18:27,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:27,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:18:27,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:18:27,345 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 323 [2023-12-05 21:18:27,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 323 transitions, 666 flow. Second operand has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:27,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:27,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 323 [2023-12-05 21:18:27,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:27,666 INFO L124 PetriNetUnfolderBase]: 159/1454 cut-off events. [2023-12-05 21:18:27,666 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-12-05 21:18:27,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 1454 events. 159/1454 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 9552 event pairs, 110 based on Foata normal form. 316/1518 useless extension candidates. Maximal degree in co-relation 969. Up to 264 conditions per place. [2023-12-05 21:18:27,678 INFO L140 encePairwiseOnDemand]: 299/323 looper letters, 33 selfloop transitions, 2 changer transitions 0/305 dead transitions. [2023-12-05 21:18:27,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 305 transitions, 700 flow [2023-12-05 21:18:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:18:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:18:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2023-12-05 21:18:27,694 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9019607843137255 [2023-12-05 21:18:27,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2023-12-05 21:18:27,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2023-12-05 21:18:27,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:27,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2023-12-05 21:18:27,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:27,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:27,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:27,712 INFO L308 CegarLoopForPetriNet]: 299 programPoint places, -1 predicate places. [2023-12-05 21:18:27,712 INFO L500 AbstractCegarLoop]: Abstraction has has 298 places, 305 transitions, 700 flow [2023-12-05 21:18:27,713 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:27,713 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:27,713 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:27,713 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:18:27,714 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:27,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1275630214, now seen corresponding path program 1 times [2023-12-05 21:18:27,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:27,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637350312] [2023-12-05 21:18:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:27,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:27,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:27,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637350312] [2023-12-05 21:18:27,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637350312] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:27,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:27,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:18:27,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318928599] [2023-12-05 21:18:27,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:27,899 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:18:27,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:27,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:18:27,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:18:27,902 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 323 [2023-12-05 21:18:27,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 305 transitions, 700 flow. Second operand has 6 states, 6 states have (on average 218.5) internal successors, (1311), 6 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:27,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:27,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 323 [2023-12-05 21:18:27,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:31,102 INFO L124 PetriNetUnfolderBase]: 8548/23061 cut-off events. [2023-12-05 21:18:31,103 INFO L125 PetriNetUnfolderBase]: For 2638/2638 co-relation queries the response was YES. [2023-12-05 21:18:31,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39515 conditions, 23061 events. 8548/23061 cut-off events. For 2638/2638 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 263366 event pairs, 8290 based on Foata normal form. 0/17941 useless extension candidates. Maximal degree in co-relation 36831. Up to 13406 conditions per place. [2023-12-05 21:18:31,286 INFO L140 encePairwiseOnDemand]: 313/323 looper letters, 77 selfloop transitions, 9 changer transitions 0/305 dead transitions. [2023-12-05 21:18:31,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 305 transitions, 872 flow [2023-12-05 21:18:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:18:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:18:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1599 transitions. [2023-12-05 21:18:31,290 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7072091994692614 [2023-12-05 21:18:31,290 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1599 transitions. [2023-12-05 21:18:31,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1599 transitions. [2023-12-05 21:18:31,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:31,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1599 transitions. [2023-12-05 21:18:31,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 228.42857142857142) internal successors, (1599), 7 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:31,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:31,297 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:31,298 INFO L308 CegarLoopForPetriNet]: 299 programPoint places, 3 predicate places. [2023-12-05 21:18:31,298 INFO L500 AbstractCegarLoop]: Abstraction has has 302 places, 305 transitions, 872 flow [2023-12-05 21:18:31,299 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 218.5) internal successors, (1311), 6 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:31,299 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:31,299 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:31,300 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:18:31,300 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:31,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:31,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1275630215, now seen corresponding path program 1 times [2023-12-05 21:18:31,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:31,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811715906] [2023-12-05 21:18:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:31,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:31,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811715906] [2023-12-05 21:18:31,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811715906] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:31,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:31,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:18:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615613446] [2023-12-05 21:18:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:31,487 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:18:31,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:18:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:18:31,489 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 323 [2023-12-05 21:18:31,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 305 transitions, 872 flow. Second operand has 6 states, 6 states have (on average 221.33333333333334) internal successors, (1328), 6 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:31,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:31,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 323 [2023-12-05 21:18:31,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:36,258 INFO L124 PetriNetUnfolderBase]: 16539/41600 cut-off events. [2023-12-05 21:18:36,259 INFO L125 PetriNetUnfolderBase]: For 17966/21307 co-relation queries the response was YES. [2023-12-05 21:18:36,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88326 conditions, 41600 events. 16539/41600 cut-off events. For 17966/21307 co-relation queries the response was YES. Maximal size of possible extension queue 1808. Compared 511622 event pairs, 16105 based on Foata normal form. 0/39748 useless extension candidates. Maximal degree in co-relation 84093. Up to 21603 conditions per place. [2023-12-05 21:18:36,608 INFO L140 encePairwiseOnDemand]: 313/323 looper letters, 73 selfloop transitions, 9 changer transitions 0/303 dead transitions. [2023-12-05 21:18:36,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 303 transitions, 1028 flow [2023-12-05 21:18:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:18:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:18:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1615 transitions. [2023-12-05 21:18:36,613 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2023-12-05 21:18:36,614 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1615 transitions. [2023-12-05 21:18:36,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1615 transitions. [2023-12-05 21:18:36,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:36,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1615 transitions. [2023-12-05 21:18:36,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 230.71428571428572) internal successors, (1615), 7 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,621 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 323.0) internal successors, (2584), 8 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,622 INFO L308 CegarLoopForPetriNet]: 299 programPoint places, 7 predicate places. [2023-12-05 21:18:36,623 INFO L500 AbstractCegarLoop]: Abstraction has has 306 places, 303 transitions, 1028 flow [2023-12-05 21:18:36,623 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.33333333333334) internal successors, (1328), 6 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,623 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:36,624 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:36,624 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:18:36,624 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:36,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:36,625 INFO L85 PathProgramCache]: Analyzing trace with hash 432320472, now seen corresponding path program 1 times [2023-12-05 21:18:36,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:36,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678754987] [2023-12-05 21:18:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:36,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:36,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:36,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678754987] [2023-12-05 21:18:36,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678754987] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:36,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:36,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:18:36,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357439391] [2023-12-05 21:18:36,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:36,806 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:18:36,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:18:36,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:18:36,809 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 323 [2023-12-05 21:18:36,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 303 transitions, 1028 flow. Second operand has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:36,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:36,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 323 [2023-12-05 21:18:36,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:42,626 INFO L124 PetriNetUnfolderBase]: 19213/49326 cut-off events. [2023-12-05 21:18:42,626 INFO L125 PetriNetUnfolderBase]: For 42592/52613 co-relation queries the response was YES. [2023-12-05 21:18:42,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129783 conditions, 49326 events. 19213/49326 cut-off events. For 42592/52613 co-relation queries the response was YES. Maximal size of possible extension queue 1974. Compared 621046 event pairs, 12619 based on Foata normal form. 530/47776 useless extension candidates. Maximal degree in co-relation 123906. Up to 24744 conditions per place. [2023-12-05 21:18:43,048 INFO L140 encePairwiseOnDemand]: 314/323 looper letters, 161 selfloop transitions, 6 changer transitions 0/386 dead transitions. [2023-12-05 21:18:43,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 386 transitions, 1854 flow [2023-12-05 21:18:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:18:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:18:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1263 transitions. [2023-12-05 21:18:43,050 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7820433436532508 [2023-12-05 21:18:43,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1263 transitions. [2023-12-05 21:18:43,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1263 transitions. [2023-12-05 21:18:43,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:43,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1263 transitions. [2023-12-05 21:18:43,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 252.6) internal successors, (1263), 5 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:43,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:43,056 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:43,058 INFO L308 CegarLoopForPetriNet]: 299 programPoint places, 10 predicate places. [2023-12-05 21:18:43,058 INFO L500 AbstractCegarLoop]: Abstraction has has 309 places, 386 transitions, 1854 flow [2023-12-05 21:18:43,059 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:43,059 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:43,059 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:43,059 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:18:43,059 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:43,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:43,060 INFO L85 PathProgramCache]: Analyzing trace with hash 432320473, now seen corresponding path program 1 times [2023-12-05 21:18:43,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:43,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663110185] [2023-12-05 21:18:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:43,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:43,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663110185] [2023-12-05 21:18:43,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663110185] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:43,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:43,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:18:43,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485661269] [2023-12-05 21:18:43,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:43,246 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:18:43,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:18:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:18:43,248 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 323 [2023-12-05 21:18:43,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 386 transitions, 1854 flow. Second operand has 7 states, 7 states have (on average 196.71428571428572) internal successors, (1377), 7 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:43,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:43,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 323 [2023-12-05 21:18:43,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:49,921 INFO L124 PetriNetUnfolderBase]: 22377/53766 cut-off events. [2023-12-05 21:18:49,922 INFO L125 PetriNetUnfolderBase]: For 66967/82417 co-relation queries the response was YES. [2023-12-05 21:18:50,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173056 conditions, 53766 events. 22377/53766 cut-off events. For 66967/82417 co-relation queries the response was YES. Maximal size of possible extension queue 2205. Compared 661007 event pairs, 13866 based on Foata normal form. 36/52629 useless extension candidates. Maximal degree in co-relation 165510. Up to 26173 conditions per place. [2023-12-05 21:18:50,375 INFO L140 encePairwiseOnDemand]: 315/323 looper letters, 201 selfloop transitions, 7 changer transitions 0/400 dead transitions. [2023-12-05 21:18:50,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 400 transitions, 2334 flow [2023-12-05 21:18:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:18:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:18:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1330 transitions. [2023-12-05 21:18:50,379 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2023-12-05 21:18:50,379 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1330 transitions. [2023-12-05 21:18:50,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1330 transitions. [2023-12-05 21:18:50,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:50,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1330 transitions. [2023-12-05 21:18:50,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:50,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:50,384 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:50,385 INFO L308 CegarLoopForPetriNet]: 299 programPoint places, 15 predicate places. [2023-12-05 21:18:50,385 INFO L500 AbstractCegarLoop]: Abstraction has has 314 places, 400 transitions, 2334 flow [2023-12-05 21:18:50,386 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 196.71428571428572) internal successors, (1377), 7 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:50,386 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:50,386 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:50,386 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:18:50,386 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:50,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:50,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1077217460, now seen corresponding path program 1 times [2023-12-05 21:18:50,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:50,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38360071] [2023-12-05 21:18:50,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:50,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:50,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:50,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38360071] [2023-12-05 21:18:50,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38360071] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:50,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597116887] [2023-12-05 21:18:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:50,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:50,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:50,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:50,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:18:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:50,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:18:50,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:50,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:18:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:50,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597116887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:18:50,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:18:50,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:18:50,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899226214] [2023-12-05 21:18:50,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:18:50,669 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:18:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:50,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:18:50,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:18:50,672 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 323 [2023-12-05 21:18:50,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 400 transitions, 2334 flow. Second operand has 10 states, 10 states have (on average 273.4) internal successors, (2734), 10 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:50,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:50,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 323 [2023-12-05 21:18:50,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:57,949 INFO L124 PetriNetUnfolderBase]: 22377/53785 cut-off events. [2023-12-05 21:18:57,949 INFO L125 PetriNetUnfolderBase]: For 87623/100140 co-relation queries the response was YES. [2023-12-05 21:18:58,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179643 conditions, 53785 events. 22377/53785 cut-off events. For 87623/100140 co-relation queries the response was YES. Maximal size of possible extension queue 2205. Compared 660710 event pairs, 13866 based on Foata normal form. 0/52612 useless extension candidates. Maximal degree in co-relation 171681. Up to 26173 conditions per place. [2023-12-05 21:18:58,443 INFO L140 encePairwiseOnDemand]: 317/323 looper letters, 60 selfloop transitions, 9 changer transitions 0/409 dead transitions. [2023-12-05 21:18:58,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 409 transitions, 2528 flow [2023-12-05 21:18:58,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:18:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:18:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2485 transitions. [2023-12-05 21:18:58,449 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8548331613347093 [2023-12-05 21:18:58,449 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2485 transitions. [2023-12-05 21:18:58,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2485 transitions. [2023-12-05 21:18:58,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:58,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2485 transitions. [2023-12-05 21:18:58,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 276.1111111111111) internal successors, (2485), 9 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:58,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 323.0) internal successors, (3230), 10 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:58,458 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 323.0) internal successors, (3230), 10 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:58,459 INFO L308 CegarLoopForPetriNet]: 299 programPoint places, 23 predicate places. [2023-12-05 21:18:58,459 INFO L500 AbstractCegarLoop]: Abstraction has has 322 places, 409 transitions, 2528 flow [2023-12-05 21:18:58,460 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 273.4) internal successors, (2734), 10 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:58,460 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:58,460 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2023-12-05 21:18:58,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-05 21:18:58,665 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-05 21:18:58,667 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:18:58,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:58,668 INFO L85 PathProgramCache]: Analyzing trace with hash -602424489, now seen corresponding path program 1 times [2023-12-05 21:18:58,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:58,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163980006] [2023-12-05 21:18:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:58,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:59,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:59,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163980006] [2023-12-05 21:18:59,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163980006] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:59,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806131711] [2023-12-05 21:18:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:59,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:59,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:59,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:59,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:18:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:59,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-05 21:18:59,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:59,318 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-05 21:18:59,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-05 21:18:59,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:18:59,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:18:59,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:18:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:59,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:19:00,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-05 21:19:00,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-12-05 21:19:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:00,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806131711] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:19:00,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:19:00,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 27 [2023-12-05 21:19:00,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915175822] [2023-12-05 21:19:00,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:19:00,483 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-05 21:19:00,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-05 21:19:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-12-05 21:19:00,487 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 323 [2023-12-05 21:19:00,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 409 transitions, 2528 flow. Second operand has 28 states, 28 states have (on average 193.57142857142858) internal successors, (5420), 28 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:00,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:00,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 323 [2023-12-05 21:19:00,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:11,596 INFO L124 PetriNetUnfolderBase]: 28461/70059 cut-off events. [2023-12-05 21:19:11,596 INFO L125 PetriNetUnfolderBase]: For 162004/185234 co-relation queries the response was YES. [2023-12-05 21:19:11,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280078 conditions, 70059 events. 28461/70059 cut-off events. For 162004/185234 co-relation queries the response was YES. Maximal size of possible extension queue 2639. Compared 905854 event pairs, 14310 based on Foata normal form. 39/68634 useless extension candidates. Maximal degree in co-relation 270616. Up to 34135 conditions per place. [2023-12-05 21:19:12,449 INFO L140 encePairwiseOnDemand]: 305/323 looper letters, 329 selfloop transitions, 22 changer transitions 0/539 dead transitions. [2023-12-05 21:19:12,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 539 transitions, 4438 flow [2023-12-05 21:19:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-05 21:19:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-12-05 21:19:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3488 transitions. [2023-12-05 21:19:12,476 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6352212711710071 [2023-12-05 21:19:12,476 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3488 transitions. [2023-12-05 21:19:12,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3488 transitions. [2023-12-05 21:19:12,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:12,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3488 transitions. [2023-12-05 21:19:12,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 205.1764705882353) internal successors, (3488), 17 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:12,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 323.0) internal successors, (5814), 18 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:12,491 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 323.0) internal successors, (5814), 18 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:12,491 INFO L308 CegarLoopForPetriNet]: 299 programPoint places, 39 predicate places. [2023-12-05 21:19:12,491 INFO L500 AbstractCegarLoop]: Abstraction has has 338 places, 539 transitions, 4438 flow [2023-12-05 21:19:12,493 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 193.57142857142858) internal successors, (5420), 28 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:12,493 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:12,494 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2023-12-05 21:19:12,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-05 21:19:12,716 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,SelfDestructingSolverStorable6 [2023-12-05 21:19:12,716 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:19:12,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1423825200, now seen corresponding path program 2 times [2023-12-05 21:19:12,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:12,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053410998] [2023-12-05 21:19:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:12,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:12,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:12,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053410998] [2023-12-05 21:19:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053410998] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:19:12,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287737047] [2023-12-05 21:19:12,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:19:12,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:19:12,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:19:12,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:19:12,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-05 21:19:13,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:19:13,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:19:13,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-05 21:19:13,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:19:13,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:19:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-05 21:19:13,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:19:13,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287737047] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:19:13,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:19:13,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-12-05 21:19:13,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140509473] [2023-12-05 21:19:13,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:19:13,155 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:19:13,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:13,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:19:13,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:19:13,156 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 323 [2023-12-05 21:19:13,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 539 transitions, 4438 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:13,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:13,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 323 [2023-12-05 21:19:13,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:24,805 INFO L124 PetriNetUnfolderBase]: 32469/74461 cut-off events. [2023-12-05 21:19:24,806 INFO L125 PetriNetUnfolderBase]: For 256777/305170 co-relation queries the response was YES. [2023-12-05 21:19:25,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342700 conditions, 74461 events. 32469/74461 cut-off events. For 256777/305170 co-relation queries the response was YES. Maximal size of possible extension queue 2790. Compared 909919 event pairs, 16808 based on Foata normal form. 5/71734 useless extension candidates. Maximal degree in co-relation 334580. Up to 38209 conditions per place. [2023-12-05 21:19:25,681 INFO L140 encePairwiseOnDemand]: 316/323 looper letters, 340 selfloop transitions, 8 changer transitions 0/642 dead transitions. [2023-12-05 21:19:25,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 642 transitions, 6329 flow [2023-12-05 21:19:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:19:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:19:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1010 transitions. [2023-12-05 21:19:25,683 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.781733746130031 [2023-12-05 21:19:25,683 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1010 transitions. [2023-12-05 21:19:25,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1010 transitions. [2023-12-05 21:19:25,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:25,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1010 transitions. [2023-12-05 21:19:25,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:25,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:25,687 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:25,687 INFO L308 CegarLoopForPetriNet]: 299 programPoint places, 42 predicate places. [2023-12-05 21:19:25,687 INFO L500 AbstractCegarLoop]: Abstraction has has 341 places, 642 transitions, 6329 flow [2023-12-05 21:19:25,688 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:25,688 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:25,688 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2023-12-05 21:19:25,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-05 21:19:25,902 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:19:25,909 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-12-05 21:19:25,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1423825201, now seen corresponding path program 1 times [2023-12-05 21:19:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:25,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988214319] [2023-12-05 21:19:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:25,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-05 21:19:25,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:25,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988214319] [2023-12-05 21:19:25,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988214319] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:19:25,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:19:25,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:19:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313803535] [2023-12-05 21:19:25,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:19:25,982 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:19:25,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:25,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:19:25,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:19:25,984 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 323 [2023-12-05 21:19:25,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 642 transitions, 6329 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:25,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:25,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 323 [2023-12-05 21:19:25,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand