/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 05:16:45,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 05:16:45,894 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-11-30 05:16:45,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 05:16:45,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 05:16:45,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 05:16:45,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 05:16:45,914 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 05:16:45,914 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 05:16:45,915 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 05:16:45,915 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 05:16:45,915 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 05:16:45,915 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 05:16:45,916 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 05:16:45,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 05:16:45,916 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 05:16:45,916 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 05:16:45,917 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 05:16:45,917 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 05:16:45,917 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 05:16:45,918 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 05:16:45,918 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 05:16:45,918 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 05:16:45,919 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 05:16:45,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 05:16:45,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:16:45,919 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 05:16:45,920 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 05:16:45,920 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 05:16:45,920 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 05:16:45,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 05:16:45,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 05:16:45,921 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 05:16:45,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 05:16:46,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 05:16:46,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 05:16:46,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 05:16:46,155 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 05:16:46,156 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 05:16:46,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-11-30 05:16:47,147 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 05:16:47,347 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 05:16:47,347 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-11-30 05:16:47,362 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf3862e3/7f37e8b92e644b649cb1c09168cd7977/FLAG9d1f28463 [2023-11-30 05:16:47,377 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf3862e3/7f37e8b92e644b649cb1c09168cd7977 [2023-11-30 05:16:47,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 05:16:47,381 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 05:16:47,383 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 05:16:47,383 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 05:16:47,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 05:16:47,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c8cfff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47, skipping insertion in model container [2023-11-30 05:16:47,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,433 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 05:16:47,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:16:47,765 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 05:16:47,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:16:47,839 WARN L675 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-11-30 05:16:47,844 INFO L206 MainTranslator]: Completed translation [2023-11-30 05:16:47,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47 WrapperNode [2023-11-30 05:16:47,844 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 05:16:47,845 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 05:16:47,845 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 05:16:47,845 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 05:16:47,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,860 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,877 INFO L138 Inliner]: procedures = 274, calls = 53, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 179 [2023-11-30 05:16:47,878 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 05:16:47,878 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 05:16:47,878 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 05:16:47,878 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 05:16:47,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,887 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,887 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,891 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,910 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 05:16:47,911 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 05:16:47,911 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 05:16:47,911 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 05:16:47,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (1/1) ... [2023-11-30 05:16:47,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:16:47,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:16:47,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-30 05:16:47,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-30 05:16:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 05:16:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 05:16:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-30 05:16:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 05:16:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 05:16:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-30 05:16:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 05:16:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-30 05:16:47,954 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-30 05:16:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 05:16:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 05:16:47,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 05:16:47,956 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-30 05:16:48,045 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 05:16:48,046 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 05:16:48,305 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 05:16:48,333 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 05:16:48,333 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-30 05:16:48,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:16:48 BoogieIcfgContainer [2023-11-30 05:16:48,334 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 05:16:48,336 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 05:16:48,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 05:16:48,338 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 05:16:48,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 05:16:47" (1/3) ... [2023-11-30 05:16:48,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5228b917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:16:48, skipping insertion in model container [2023-11-30 05:16:48,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:47" (2/3) ... [2023-11-30 05:16:48,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5228b917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:16:48, skipping insertion in model container [2023-11-30 05:16:48,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:16:48" (3/3) ... [2023-11-30 05:16:48,339 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-11-30 05:16:48,351 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 05:16:48,351 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-30 05:16:48,351 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 05:16:48,388 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-30 05:16:48,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 167 transitions, 341 flow [2023-11-30 05:16:48,524 INFO L124 PetriNetUnfolderBase]: 26/220 cut-off events. [2023-11-30 05:16:48,525 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-30 05:16:48,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 220 events. 26/220 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 705 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 127. Up to 4 conditions per place. [2023-11-30 05:16:48,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 167 transitions, 341 flow [2023-11-30 05:16:48,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 167 transitions, 341 flow [2023-11-30 05:16:48,547 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:16:48,551 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;@4d9b91a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:16:48,551 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:16:48,557 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:16:48,557 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2023-11-30 05:16:48,558 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:16:48,558 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:48,558 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:16:48,559 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:16:48,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:48,562 INFO L85 PathProgramCache]: Analyzing trace with hash -901713646, now seen corresponding path program 1 times [2023-11-30 05:16:48,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:48,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846278866] [2023-11-30 05:16:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:48,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:48,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:48,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846278866] [2023-11-30 05:16:48,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846278866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:48,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:48,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:16:48,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080093580] [2023-11-30 05:16:48,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:48,827 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:16:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:48,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:16:48,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:16:48,847 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 167 [2023-11-30 05:16:48,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 167 transitions, 341 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:48,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:48,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 167 [2023-11-30 05:16:48,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:49,027 INFO L124 PetriNetUnfolderBase]: 168/952 cut-off events. [2023-11-30 05:16:49,027 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-30 05:16:49,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 952 events. 168/952 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6584 event pairs, 120 based on Foata normal form. 177/1076 useless extension candidates. Maximal degree in co-relation 1207. Up to 275 conditions per place. [2023-11-30 05:16:49,033 INFO L140 encePairwiseOnDemand]: 145/167 looper letters, 41 selfloop transitions, 2 changer transitions 4/156 dead transitions. [2023-11-30 05:16:49,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 156 transitions, 413 flow [2023-11-30 05:16:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:16:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:16:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-11-30 05:16:49,048 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8223552894211577 [2023-11-30 05:16:49,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-11-30 05:16:49,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-11-30 05:16:49,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:49,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-11-30 05:16:49,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:49,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:49,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:49,066 INFO L307 CegarLoopForPetriNet]: 150 programPoint places, -3 predicate places. [2023-11-30 05:16:49,066 INFO L500 AbstractCegarLoop]: Abstraction has has 147 places, 156 transitions, 413 flow [2023-11-30 05:16:49,067 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:49,067 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:49,067 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:16:49,067 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 05:16:49,067 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:16:49,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:49,069 INFO L85 PathProgramCache]: Analyzing trace with hash -901713645, now seen corresponding path program 1 times [2023-11-30 05:16:49,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:49,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706734156] [2023-11-30 05:16:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:49,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:49,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706734156] [2023-11-30 05:16:49,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706734156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:49,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:49,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:16:49,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460264545] [2023-11-30 05:16:49,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:49,271 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:16:49,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:49,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:16:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:16:49,273 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 167 [2023-11-30 05:16:49,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 156 transitions, 413 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:49,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:49,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 167 [2023-11-30 05:16:49,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:49,462 INFO L124 PetriNetUnfolderBase]: 218/970 cut-off events. [2023-11-30 05:16:49,462 INFO L125 PetriNetUnfolderBase]: For 200/206 co-relation queries the response was YES. [2023-11-30 05:16:49,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 970 events. 218/970 cut-off events. For 200/206 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 6614 event pairs, 12 based on Foata normal form. 0/880 useless extension candidates. Maximal degree in co-relation 1762. Up to 380 conditions per place. [2023-11-30 05:16:49,468 INFO L140 encePairwiseOnDemand]: 161/167 looper letters, 66 selfloop transitions, 4 changer transitions 8/182 dead transitions. [2023-11-30 05:16:49,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 182 transitions, 671 flow [2023-11-30 05:16:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:16:49,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:16:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 492 transitions. [2023-11-30 05:16:49,469 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7365269461077845 [2023-11-30 05:16:49,470 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 492 transitions. [2023-11-30 05:16:49,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 492 transitions. [2023-11-30 05:16:49,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:49,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 492 transitions. [2023-11-30 05:16:49,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:49,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:49,473 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:49,473 INFO L307 CegarLoopForPetriNet]: 150 programPoint places, 0 predicate places. [2023-11-30 05:16:49,474 INFO L500 AbstractCegarLoop]: Abstraction has has 150 places, 182 transitions, 671 flow [2023-11-30 05:16:49,474 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:49,474 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:49,474 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:16:49,474 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 05:16:49,475 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:16:49,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1015821556, now seen corresponding path program 1 times [2023-11-30 05:16:49,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:49,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738327943] [2023-11-30 05:16:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:49,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:49,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738327943] [2023-11-30 05:16:49,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738327943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:16:49,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600079173] [2023-11-30 05:16:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:49,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:16:49,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:16:49,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 05:16:49,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-30 05:16:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:49,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:16:49,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:16:49,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-30 05:16:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:49,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:16:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:50,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600079173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:16:50,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:16:50,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-30 05:16:50,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389173696] [2023-11-30 05:16:50,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:16:50,017 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-30 05:16:50,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:50,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-30 05:16:50,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-30 05:16:50,019 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 167 [2023-11-30 05:16:50,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 182 transitions, 671 flow. Second operand has 14 states, 14 states have (on average 107.57142857142857) internal successors, (1506), 14 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:50,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:50,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 167 [2023-11-30 05:16:50,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:50,158 INFO L124 PetriNetUnfolderBase]: 61/269 cut-off events. [2023-11-30 05:16:50,158 INFO L125 PetriNetUnfolderBase]: For 196/239 co-relation queries the response was YES. [2023-11-30 05:16:50,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 269 events. 61/269 cut-off events. For 196/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1120 event pairs, 0 based on Foata normal form. 19/286 useless extension candidates. Maximal degree in co-relation 564. Up to 88 conditions per place. [2023-11-30 05:16:50,160 INFO L140 encePairwiseOnDemand]: 160/167 looper letters, 59 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2023-11-30 05:16:50,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 139 transitions, 654 flow [2023-11-30 05:16:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 05:16:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 05:16:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 801 transitions. [2023-11-30 05:16:50,162 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6852010265183918 [2023-11-30 05:16:50,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 801 transitions. [2023-11-30 05:16:50,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 801 transitions. [2023-11-30 05:16:50,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:50,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 801 transitions. [2023-11-30 05:16:50,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:50,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:50,166 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:50,167 INFO L307 CegarLoopForPetriNet]: 150 programPoint places, -36 predicate places. [2023-11-30 05:16:50,168 INFO L500 AbstractCegarLoop]: Abstraction has has 114 places, 139 transitions, 654 flow [2023-11-30 05:16:50,169 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.57142857142857) internal successors, (1506), 14 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:50,169 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:50,169 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:16:50,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-30 05:16:50,374 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:16:50,374 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:16:50,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:50,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1425697660, now seen corresponding path program 1 times [2023-11-30 05:16:50,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:50,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129898471] [2023-11-30 05:16:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:16:50,397 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:16:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:16:50,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:16:50,428 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:16:50,429 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:16:50,430 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:16:50,430 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:16:50,430 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:16:50,431 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:16:50,431 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 05:16:50,431 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-30 05:16:50,433 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:16:50,433 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-30 05:16:50,466 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-30 05:16:50,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 238 transitions, 492 flow [2023-11-30 05:16:50,512 INFO L124 PetriNetUnfolderBase]: 48/372 cut-off events. [2023-11-30 05:16:50,513 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-30 05:16:50,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 372 events. 48/372 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1463 event pairs, 0 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 222. Up to 8 conditions per place. [2023-11-30 05:16:50,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 238 transitions, 492 flow [2023-11-30 05:16:50,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 238 transitions, 492 flow [2023-11-30 05:16:50,520 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:16:50,521 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;@4d9b91a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:16:50,522 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:16:50,526 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:16:50,526 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2023-11-30 05:16:50,526 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:16:50,526 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:50,526 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:16:50,526 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:16:50,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:50,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1405699456, now seen corresponding path program 1 times [2023-11-30 05:16:50,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:50,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123158292] [2023-11-30 05:16:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:50,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123158292] [2023-11-30 05:16:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123158292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:50,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:50,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:16:50,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147006210] [2023-11-30 05:16:50,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:50,561 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:16:50,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:16:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:16:50,562 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 238 [2023-11-30 05:16:50,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 238 transitions, 492 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:50,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:50,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 238 [2023-11-30 05:16:50,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:51,998 INFO L124 PetriNetUnfolderBase]: 4645/14913 cut-off events. [2023-11-30 05:16:51,998 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-30 05:16:52,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22136 conditions, 14913 events. 4645/14913 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 169415 event pairs, 3444 based on Foata normal form. 3955/18125 useless extension candidates. Maximal degree in co-relation 1963. Up to 5535 conditions per place. [2023-11-30 05:16:52,136 INFO L140 encePairwiseOnDemand]: 204/238 looper letters, 71 selfloop transitions, 2 changer transitions 0/227 dead transitions. [2023-11-30 05:16:52,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 227 transitions, 616 flow [2023-11-30 05:16:52,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:16:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:16:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-11-30 05:16:52,138 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8361344537815126 [2023-11-30 05:16:52,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-11-30 05:16:52,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-11-30 05:16:52,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:52,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-11-30 05:16:52,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:52,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:52,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:52,143 INFO L307 CegarLoopForPetriNet]: 209 programPoint places, -3 predicate places. [2023-11-30 05:16:52,143 INFO L500 AbstractCegarLoop]: Abstraction has has 206 places, 227 transitions, 616 flow [2023-11-30 05:16:52,143 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:52,144 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:52,144 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:16:52,144 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-30 05:16:52,144 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:16:52,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:52,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1405699455, now seen corresponding path program 1 times [2023-11-30 05:16:52,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:52,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295071655] [2023-11-30 05:16:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:52,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:52,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:52,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295071655] [2023-11-30 05:16:52,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295071655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:52,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:52,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:16:52,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570054646] [2023-11-30 05:16:52,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:52,198 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:16:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:16:52,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:16:52,199 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 238 [2023-11-30 05:16:52,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 227 transitions, 616 flow. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:52,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:52,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 238 [2023-11-30 05:16:52,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:53,647 INFO L124 PetriNetUnfolderBase]: 6114/16200 cut-off events. [2023-11-30 05:16:53,647 INFO L125 PetriNetUnfolderBase]: For 3554/3638 co-relation queries the response was YES. [2023-11-30 05:16:53,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34639 conditions, 16200 events. 6114/16200 cut-off events. For 3554/3638 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 175238 event pairs, 2388 based on Foata normal form. 0/14797 useless extension candidates. Maximal degree in co-relation 3265. Up to 8527 conditions per place. [2023-11-30 05:16:53,727 INFO L140 encePairwiseOnDemand]: 232/238 looper letters, 114 selfloop transitions, 4 changer transitions 0/267 dead transitions. [2023-11-30 05:16:53,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 267 transitions, 1006 flow [2023-11-30 05:16:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:16:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:16:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 700 transitions. [2023-11-30 05:16:53,729 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7352941176470589 [2023-11-30 05:16:53,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 700 transitions. [2023-11-30 05:16:53,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 700 transitions. [2023-11-30 05:16:53,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:53,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 700 transitions. [2023-11-30 05:16:53,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:53,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:53,732 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:53,733 INFO L307 CegarLoopForPetriNet]: 209 programPoint places, 0 predicate places. [2023-11-30 05:16:53,733 INFO L500 AbstractCegarLoop]: Abstraction has has 209 places, 267 transitions, 1006 flow [2023-11-30 05:16:53,733 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:53,733 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:53,733 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:16:53,733 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-30 05:16:53,733 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:16:53,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1415627011, now seen corresponding path program 1 times [2023-11-30 05:16:53,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:53,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796338900] [2023-11-30 05:16:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:53,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:53,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:53,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796338900] [2023-11-30 05:16:53,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796338900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:16:53,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522950881] [2023-11-30 05:16:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:53,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:16:53,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:16:53,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 05:16:53,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-30 05:16:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:53,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:16:53,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:16:53,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-30 05:16:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:54,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:16:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:54,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522950881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:16:54,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:16:54,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-30 05:16:54,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074792487] [2023-11-30 05:16:54,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:16:54,117 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-30 05:16:54,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:54,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-30 05:16:54,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-30 05:16:54,118 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 238 [2023-11-30 05:16:54,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 267 transitions, 1006 flow. Second operand has 14 states, 14 states have (on average 152.57142857142858) internal successors, (2136), 14 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:54,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:54,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 238 [2023-11-30 05:16:54,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:54,656 INFO L124 PetriNetUnfolderBase]: 1803/4576 cut-off events. [2023-11-30 05:16:54,656 INFO L125 PetriNetUnfolderBase]: For 3786/4662 co-relation queries the response was YES. [2023-11-30 05:16:54,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12346 conditions, 4576 events. 1803/4576 cut-off events. For 3786/4662 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 40316 event pairs, 75 based on Foata normal form. 13/4503 useless extension candidates. Maximal degree in co-relation 1221. Up to 2649 conditions per place. [2023-11-30 05:16:54,685 INFO L140 encePairwiseOnDemand]: 231/238 looper letters, 146 selfloop transitions, 8 changer transitions 0/274 dead transitions. [2023-11-30 05:16:54,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 274 transitions, 1460 flow [2023-11-30 05:16:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 05:16:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 05:16:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1658 transitions. [2023-11-30 05:16:54,738 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6966386554621848 [2023-11-30 05:16:54,739 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1658 transitions. [2023-11-30 05:16:54,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1658 transitions. [2023-11-30 05:16:54,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:54,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1658 transitions. [2023-11-30 05:16:54,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 165.8) internal successors, (1658), 10 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:54,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 238.0) internal successors, (2618), 11 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:54,745 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 238.0) internal successors, (2618), 11 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:54,746 INFO L307 CegarLoopForPetriNet]: 209 programPoint places, -33 predicate places. [2023-11-30 05:16:54,746 INFO L500 AbstractCegarLoop]: Abstraction has has 176 places, 274 transitions, 1460 flow [2023-11-30 05:16:54,746 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 152.57142857142858) internal successors, (2136), 14 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:54,746 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:54,747 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:16:54,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-30 05:16:54,950 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 [2023-11-30 05:16:54,951 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:16:54,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2146014069, now seen corresponding path program 1 times [2023-11-30 05:16:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:54,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424020585] [2023-11-30 05:16:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:16:54,962 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:16:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:16:54,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:16:54,980 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:16:54,980 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:16:54,981 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:16:54,983 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:16:54,983 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:16:54,983 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:16:54,983 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-30 05:16:54,983 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-30 05:16:54,984 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:16:54,984 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-30 05:16:55,015 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-30 05:16:55,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 309 transitions, 645 flow [2023-11-30 05:16:55,056 INFO L124 PetriNetUnfolderBase]: 75/563 cut-off events. [2023-11-30 05:16:55,057 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-30 05:16:55,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 563 events. 75/563 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2453 event pairs, 1 based on Foata normal form. 0/460 useless extension candidates. Maximal degree in co-relation 380. Up to 16 conditions per place. [2023-11-30 05:16:55,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 309 transitions, 645 flow [2023-11-30 05:16:55,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 309 transitions, 645 flow [2023-11-30 05:16:55,065 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:16:55,065 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;@4d9b91a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:16:55,065 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:16:55,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:16:55,067 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2023-11-30 05:16:55,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:16:55,067 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:55,067 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:16:55,067 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:16:55,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1338190731, now seen corresponding path program 1 times [2023-11-30 05:16:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:55,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369684146] [2023-11-30 05:16:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:55,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:16:55,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:55,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369684146] [2023-11-30 05:16:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369684146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:55,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:16:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965204120] [2023-11-30 05:16:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:55,094 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:16:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:16:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:16:55,096 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 309 [2023-11-30 05:16:55,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 309 transitions, 645 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:16:55,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:55,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 309 [2023-11-30 05:16:55,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:17:17,816 INFO L124 PetriNetUnfolderBase]: 94301/230773 cut-off events. [2023-11-30 05:17:17,816 INFO L125 PetriNetUnfolderBase]: For 3121/3121 co-relation queries the response was YES. [2023-11-30 05:17:18,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360050 conditions, 230773 events. 94301/230773 cut-off events. For 3121/3121 co-relation queries the response was YES. Maximal size of possible extension queue 5661. Compared 3299850 event pairs, 70573 based on Foata normal form. 74203/295068 useless extension candidates. Maximal degree in co-relation 22119. Up to 98392 conditions per place. [2023-11-30 05:17:19,807 INFO L140 encePairwiseOnDemand]: 263/309 looper letters, 97 selfloop transitions, 2 changer transitions 0/298 dead transitions. [2023-11-30 05:17:19,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 298 transitions, 821 flow [2023-11-30 05:17:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:17:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:17:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-11-30 05:17:19,810 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8435814455231931 [2023-11-30 05:17:19,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-11-30 05:17:19,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-11-30 05:17:19,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:17:19,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-11-30 05:17:19,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:19,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:19,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:19,813 INFO L307 CegarLoopForPetriNet]: 268 programPoint places, -3 predicate places. [2023-11-30 05:17:19,813 INFO L500 AbstractCegarLoop]: Abstraction has has 265 places, 298 transitions, 821 flow [2023-11-30 05:17:19,814 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:19,814 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:17:19,814 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:17:19,814 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-30 05:17:19,814 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:17:19,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:17:19,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1338190730, now seen corresponding path program 1 times [2023-11-30 05:17:19,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:17:19,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352169326] [2023-11-30 05:17:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:17:19,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:17:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:17:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:17:19,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:17:19,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352169326] [2023-11-30 05:17:19,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352169326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:17:19,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:17:19,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:17:19,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462183227] [2023-11-30 05:17:19,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:17:19,860 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:17:19,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:17:19,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:17:19,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:17:19,861 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 309 [2023-11-30 05:17:19,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 298 transitions, 821 flow. Second operand has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:19,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:17:19,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 309 [2023-11-30 05:17:19,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:17:50,704 INFO L124 PetriNetUnfolderBase]: 126722/307664 cut-off events. [2023-11-30 05:17:50,704 INFO L125 PetriNetUnfolderBase]: For 44023/45791 co-relation queries the response was YES. [2023-11-30 05:17:52,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639863 conditions, 307664 events. 126722/307664 cut-off events. For 44023/45791 co-relation queries the response was YES. Maximal size of possible extension queue 7114. Compared 4531744 event pairs, 66865 based on Foata normal form. 0/295265 useless extension candidates. Maximal degree in co-relation 38419. Up to 151745 conditions per place. [2023-11-30 05:17:53,336 INFO L140 encePairwiseOnDemand]: 303/309 looper letters, 152 selfloop transitions, 4 changer transitions 0/350 dead transitions. [2023-11-30 05:17:53,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 350 transitions, 1335 flow [2023-11-30 05:17:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:17:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:17:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 906 transitions. [2023-11-30 05:17:53,338 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7330097087378641 [2023-11-30 05:17:53,338 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 906 transitions. [2023-11-30 05:17:53,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 906 transitions. [2023-11-30 05:17:53,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:17:53,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 906 transitions. [2023-11-30 05:17:53,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.5) internal successors, (906), 4 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:53,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:53,341 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:53,342 INFO L307 CegarLoopForPetriNet]: 268 programPoint places, 0 predicate places. [2023-11-30 05:17:53,342 INFO L500 AbstractCegarLoop]: Abstraction has has 268 places, 350 transitions, 1335 flow [2023-11-30 05:17:53,342 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:53,342 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:17:53,342 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:17:53,342 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-30 05:17:53,342 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:17:53,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:17:53,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1122903763, now seen corresponding path program 1 times [2023-11-30 05:17:53,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:17:53,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255630674] [2023-11-30 05:17:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:17:53,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:17:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:17:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:17:53,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:17:53,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255630674] [2023-11-30 05:17:53,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255630674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:17:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255000751] [2023-11-30 05:17:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:17:53,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:17:53,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:17:53,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 05:17:53,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-30 05:17:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:17:53,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:17:53,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:17:53,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-30 05:17:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:17:53,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:17:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:17:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255000751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:17:53,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:17:53,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-30 05:17:53,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544322291] [2023-11-30 05:17:53,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:17:53,623 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-30 05:17:53,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:17:53,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-30 05:17:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-30 05:17:53,624 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 309 [2023-11-30 05:17:53,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 350 transitions, 1335 flow. Second operand has 11 states, 11 states have (on average 197.72727272727272) internal successors, (2175), 11 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:53,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:17:53,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 309 [2023-11-30 05:17:53,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:18:21,712 INFO L124 PetriNetUnfolderBase]: 130333/264067 cut-off events. [2023-11-30 05:18:21,712 INFO L125 PetriNetUnfolderBase]: For 144828/178554 co-relation queries the response was YES. [2023-11-30 05:18:22,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787170 conditions, 264067 events. 130333/264067 cut-off events. For 144828/178554 co-relation queries the response was YES. Maximal size of possible extension queue 6100. Compared 3382741 event pairs, 4070 based on Foata normal form. 13/245766 useless extension candidates. Maximal degree in co-relation 45608. Up to 157447 conditions per place. [2023-11-30 05:18:24,667 INFO L140 encePairwiseOnDemand]: 299/309 looper letters, 287 selfloop transitions, 12 changer transitions 0/492 dead transitions. [2023-11-30 05:18:24,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 492 transitions, 2765 flow [2023-11-30 05:18:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 05:18:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 05:18:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2216 transitions. [2023-11-30 05:18:24,671 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7171521035598706 [2023-11-30 05:18:24,671 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2216 transitions. [2023-11-30 05:18:24,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2216 transitions. [2023-11-30 05:18:24,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:18:24,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2216 transitions. [2023-11-30 05:18:24,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 221.6) internal successors, (2216), 10 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:24,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 309.0) internal successors, (3399), 11 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:24,678 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 309.0) internal successors, (3399), 11 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:24,679 INFO L307 CegarLoopForPetriNet]: 268 programPoint places, 9 predicate places. [2023-11-30 05:18:24,679 INFO L500 AbstractCegarLoop]: Abstraction has has 277 places, 492 transitions, 2765 flow [2023-11-30 05:18:24,679 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 197.72727272727272) internal successors, (2175), 11 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:24,679 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:18:24,679 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:18:24,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-30 05:18:24,883 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:18:24,883 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:18:24,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:18:24,884 INFO L85 PathProgramCache]: Analyzing trace with hash 195354872, now seen corresponding path program 1 times [2023-11-30 05:18:24,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:18:24,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356221598] [2023-11-30 05:18:24,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:18:24,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:18:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:18:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:18:25,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:18:25,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356221598] [2023-11-30 05:18:25,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356221598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:18:25,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624461659] [2023-11-30 05:18:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:18:25,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:18:25,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:18:25,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 05:18:25,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-30 05:18:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:18:25,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-30 05:18:25,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:18:25,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-30 05:18:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:18:25,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:18:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:18:25,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624461659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:18:25,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:18:25,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-30 05:18:25,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290932492] [2023-11-30 05:18:25,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:18:25,541 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-30 05:18:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:18:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-30 05:18:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2023-11-30 05:18:25,543 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 309 [2023-11-30 05:18:25,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 492 transitions, 2765 flow. Second operand has 23 states, 23 states have (on average 197.8695652173913) internal successors, (4551), 23 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:25,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:18:25,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 309 [2023-11-30 05:18:25,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:18:35,476 INFO L124 PetriNetUnfolderBase]: 36970/81632 cut-off events. [2023-11-30 05:18:35,476 INFO L125 PetriNetUnfolderBase]: For 88025/108108 co-relation queries the response was YES. [2023-11-30 05:18:35,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272605 conditions, 81632 events. 36970/81632 cut-off events. For 88025/108108 co-relation queries the response was YES. Maximal size of possible extension queue 2318. Compared 979850 event pairs, 1539 based on Foata normal form. 3811/84806 useless extension candidates. Maximal degree in co-relation 15887. Up to 48110 conditions per place. [2023-11-30 05:18:36,583 INFO L140 encePairwiseOnDemand]: 302/309 looper letters, 305 selfloop transitions, 11 changer transitions 0/481 dead transitions. [2023-11-30 05:18:36,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 481 transitions, 3476 flow [2023-11-30 05:18:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-30 05:18:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-30 05:18:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2818 transitions. [2023-11-30 05:18:36,603 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7015185461787403 [2023-11-30 05:18:36,603 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2818 transitions. [2023-11-30 05:18:36,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2818 transitions. [2023-11-30 05:18:36,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:18:36,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2818 transitions. [2023-11-30 05:18:36,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 216.76923076923077) internal successors, (2818), 13 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:36,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 309.0) internal successors, (4326), 14 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:36,625 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 309.0) internal successors, (4326), 14 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:36,626 INFO L307 CegarLoopForPetriNet]: 268 programPoint places, -21 predicate places. [2023-11-30 05:18:36,626 INFO L500 AbstractCegarLoop]: Abstraction has has 247 places, 481 transitions, 3476 flow [2023-11-30 05:18:36,627 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 197.8695652173913) internal successors, (4551), 23 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:36,627 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:18:36,632 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:18:36,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-30 05:18:36,836 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:18:36,836 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:18:36,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:18:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1761034917, now seen corresponding path program 1 times [2023-11-30 05:18:36,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:18:36,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034480605] [2023-11-30 05:18:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:18:36,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:18:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:18:36,847 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:18:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:18:36,878 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:18:36,879 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:18:36,879 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:18:36,879 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:18:36,879 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:18:36,879 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:18:36,879 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:18:36,879 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-30 05:18:36,892 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-30 05:18:36,892 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:18:36,892 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-30 05:18:36,919 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-30 05:18:36,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 380 transitions, 800 flow [2023-11-30 05:18:37,046 INFO L124 PetriNetUnfolderBase]: 114/834 cut-off events. [2023-11-30 05:18:37,046 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-30 05:18:37,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 834 events. 114/834 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3930 event pairs, 6 based on Foata normal form. 0/678 useless extension candidates. Maximal degree in co-relation 583. Up to 32 conditions per place. [2023-11-30 05:18:37,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 380 transitions, 800 flow [2023-11-30 05:18:37,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 380 transitions, 800 flow [2023-11-30 05:18:37,084 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:18:37,085 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;@4d9b91a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:18:37,085 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:18:37,086 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:18:37,086 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2023-11-30 05:18:37,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:18:37,086 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:18:37,087 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:18:37,087 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:18:37,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:18:37,087 INFO L85 PathProgramCache]: Analyzing trace with hash -699187471, now seen corresponding path program 1 times [2023-11-30 05:18:37,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:18:37,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487092113] [2023-11-30 05:18:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:18:37,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:18:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:18:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:18:37,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:18:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487092113] [2023-11-30 05:18:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487092113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:18:37,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:18:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:18:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181987041] [2023-11-30 05:18:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:18:37,143 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:18:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:18:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:18:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:18:37,144 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 380 [2023-11-30 05:18:37,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 380 transitions, 800 flow. Second operand has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:18:37,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:18:37,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 380 [2023-11-30 05:18:37,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand