/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:04:03,035 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:04:03,101 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:04:03,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:04:03,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:04:03,127 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:04:03,127 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:04:03,127 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:04:03,128 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:04:03,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:04:03,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:04:03,131 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:04:03,131 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:04:03,132 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:04:03,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:04:03,132 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:04:03,132 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:04:03,132 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:04:03,132 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:04:03,133 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:04:03,133 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:04:03,133 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:04:03,133 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:04:03,134 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:04:03,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:04:03,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:04:03,134 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:04:03,134 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:04:03,134 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:04:03,135 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:04:03,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:04:03,135 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:04:03,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:04:03,136 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:04:03,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:04:03,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:04:03,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:04:03,342 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:04:03,342 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:04:03,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-12-05 21:04:04,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:04:04,575 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:04:04,575 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-12-05 21:04:04,597 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a509188b3/a4722cdec5494c9a86b75a290ba91998/FLAG47110a855 [2023-12-05 21:04:04,607 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a509188b3/a4722cdec5494c9a86b75a290ba91998 [2023-12-05 21:04:04,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:04:04,610 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:04:04,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:04:04,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:04:04,622 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:04:04,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:04:04" (1/1) ... [2023-12-05 21:04:04,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a7749ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:04, skipping insertion in model container [2023-12-05 21:04:04,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:04:04" (1/1) ... [2023-12-05 21:04:04,658 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:04:04,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:04:04,934 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:04:04,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:04:05,006 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:04:05,007 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:04:05,012 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:04:05,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05 WrapperNode [2023-12-05 21:04:05,013 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:04:05,014 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:04:05,014 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:04:05,014 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:04:05,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,032 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,051 INFO L138 Inliner]: procedures = 179, calls = 50, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 194 [2023-12-05 21:04:05,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:04:05,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:04:05,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:04:05,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:04:05,066 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,069 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,069 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,075 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:04:05,084 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:04:05,084 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:04:05,084 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:04:05,085 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:04:05,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:04:05,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:04:05,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:04:05,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:04:05,197 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:04:05,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:04:05,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:04:05,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:04:05,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:04:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:04:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:04:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:04:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:04:05,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:04:05,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:04:05,201 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:04:05,312 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:04:05,313 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:04:05,618 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:04:05,762 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:04:05,762 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-05 21:04:05,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:04:05 BoogieIcfgContainer [2023-12-05 21:04:05,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:04:05,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:04:05,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:04:05,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:04:05,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:04:04" (1/3) ... [2023-12-05 21:04:05,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab8165a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:04:05, skipping insertion in model container [2023-12-05 21:04:05,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (2/3) ... [2023-12-05 21:04:05,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab8165a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:04:05, skipping insertion in model container [2023-12-05 21:04:05,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:04:05" (3/3) ... [2023-12-05 21:04:05,769 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-1.i [2023-12-05 21:04:05,780 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:04:05,781 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 40 error locations. [2023-12-05 21:04:05,781 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:04:05,858 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:05,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 157 transitions, 318 flow [2023-12-05 21:04:05,957 INFO L124 PetriNetUnfolderBase]: 12/170 cut-off events. [2023-12-05 21:04:05,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:05,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 170 events. 12/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 329 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 134. Up to 4 conditions per place. [2023-12-05 21:04:05,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 157 transitions, 318 flow [2023-12-05 21:04:05,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 157 transitions, 318 flow [2023-12-05 21:04:05,986 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:05,994 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;@1c6de528, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:05,994 INFO L363 AbstractCegarLoop]: Starting to check reachability of 79 error locations. [2023-12-05 21:04:05,998 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:05,999 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-12-05 21:04:05,999 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:05,999 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:05,999 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:06,000 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:06,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2139027774, now seen corresponding path program 1 times [2023-12-05 21:04:06,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:06,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994922110] [2023-12-05 21:04:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:06,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:06,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:06,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994922110] [2023-12-05 21:04:06,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994922110] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:06,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:06,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:06,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034744847] [2023-12-05 21:04:06,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:06,288 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:06,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:06,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:06,315 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 157 [2023-12-05 21:04:06,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 157 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:06,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 157 [2023-12-05 21:04:06,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:06,587 INFO L124 PetriNetUnfolderBase]: 171/713 cut-off events. [2023-12-05 21:04:06,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:06,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 713 events. 171/713 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3747 event pairs, 82 based on Foata normal form. 68/513 useless extension candidates. Maximal degree in co-relation 1039. Up to 186 conditions per place. [2023-12-05 21:04:06,596 INFO L140 encePairwiseOnDemand]: 134/157 looper letters, 74 selfloop transitions, 4 changer transitions 0/161 dead transitions. [2023-12-05 21:04:06,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 161 transitions, 482 flow [2023-12-05 21:04:06,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-12-05 21:04:06,611 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7898089171974523 [2023-12-05 21:04:06,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-12-05 21:04:06,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-12-05 21:04:06,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:06,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-12-05 21:04:06,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,627 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -19 predicate places. [2023-12-05 21:04:06,627 INFO L500 AbstractCegarLoop]: Abstraction has has 130 places, 161 transitions, 482 flow [2023-12-05 21:04:06,628 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,628 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:06,628 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:06,628 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:04:06,628 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:06,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2139027773, now seen corresponding path program 1 times [2023-12-05 21:04:06,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:06,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257592078] [2023-12-05 21:04:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:06,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:06,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:06,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257592078] [2023-12-05 21:04:06,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257592078] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:06,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:06,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:06,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7463092] [2023-12-05 21:04:06,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:06,772 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:06,774 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 157 [2023-12-05 21:04:06,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 161 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:06,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 157 [2023-12-05 21:04:06,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:06,897 INFO L124 PetriNetUnfolderBase]: 110/501 cut-off events. [2023-12-05 21:04:06,897 INFO L125 PetriNetUnfolderBase]: For 55/77 co-relation queries the response was YES. [2023-12-05 21:04:06,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 501 events. 110/501 cut-off events. For 55/77 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2133 event pairs, 56 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 945. Up to 235 conditions per place. [2023-12-05 21:04:06,900 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 69 selfloop transitions, 1 changer transitions 0/159 dead transitions. [2023-12-05 21:04:06,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 159 transitions, 614 flow [2023-12-05 21:04:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-12-05 21:04:06,902 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6751592356687898 [2023-12-05 21:04:06,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-12-05 21:04:06,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-12-05 21:04:06,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:06,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-12-05 21:04:06,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,906 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -18 predicate places. [2023-12-05 21:04:06,907 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 614 flow [2023-12-05 21:04:06,907 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:06,907 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:06,907 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:06,907 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:04:06,907 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:06,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash 654146078, now seen corresponding path program 1 times [2023-12-05 21:04:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:06,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031732220] [2023-12-05 21:04:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:07,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:07,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031732220] [2023-12-05 21:04:07,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031732220] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:07,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:07,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:07,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365263984] [2023-12-05 21:04:07,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:07,088 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:07,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:07,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:07,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:07,093 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 157 [2023-12-05 21:04:07,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 614 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:07,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 157 [2023-12-05 21:04:07,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:07,277 INFO L124 PetriNetUnfolderBase]: 112/552 cut-off events. [2023-12-05 21:04:07,277 INFO L125 PetriNetUnfolderBase]: For 191/245 co-relation queries the response was YES. [2023-12-05 21:04:07,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363 conditions, 552 events. 112/552 cut-off events. For 191/245 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2696 event pairs, 54 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 1293. Up to 252 conditions per place. [2023-12-05 21:04:07,284 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 97 selfloop transitions, 4 changer transitions 0/182 dead transitions. [2023-12-05 21:04:07,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 948 flow [2023-12-05 21:04:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:04:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:04:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-12-05 21:04:07,285 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.660828025477707 [2023-12-05 21:04:07,285 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-12-05 21:04:07,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-12-05 21:04:07,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:07,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-12-05 21:04:07,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,288 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,289 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -17 predicate places. [2023-12-05 21:04:07,289 INFO L500 AbstractCegarLoop]: Abstraction has has 132 places, 182 transitions, 948 flow [2023-12-05 21:04:07,289 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,289 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:07,289 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:07,290 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:04:07,290 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:07,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:07,290 INFO L85 PathProgramCache]: Analyzing trace with hash 654146079, now seen corresponding path program 1 times [2023-12-05 21:04:07,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:07,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94928516] [2023-12-05 21:04:07,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:07,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:07,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:07,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94928516] [2023-12-05 21:04:07,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94928516] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:07,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:07,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:07,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081298217] [2023-12-05 21:04:07,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:07,440 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:07,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:07,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:07,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:07,442 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 157 [2023-12-05 21:04:07,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 182 transitions, 948 flow. Second operand has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:07,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 157 [2023-12-05 21:04:07,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:07,641 INFO L124 PetriNetUnfolderBase]: 110/546 cut-off events. [2023-12-05 21:04:07,642 INFO L125 PetriNetUnfolderBase]: For 385/461 co-relation queries the response was YES. [2023-12-05 21:04:07,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 546 events. 110/546 cut-off events. For 385/461 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2664 event pairs, 52 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1533. Up to 246 conditions per place. [2023-12-05 21:04:07,645 INFO L140 encePairwiseOnDemand]: 150/157 looper letters, 97 selfloop transitions, 5 changer transitions 0/181 dead transitions. [2023-12-05 21:04:07,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 181 transitions, 1140 flow [2023-12-05 21:04:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:04:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:04:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 574 transitions. [2023-12-05 21:04:07,662 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6093418259023354 [2023-12-05 21:04:07,662 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 574 transitions. [2023-12-05 21:04:07,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 574 transitions. [2023-12-05 21:04:07,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:07,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 574 transitions. [2023-12-05 21:04:07,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,665 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,666 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -14 predicate places. [2023-12-05 21:04:07,666 INFO L500 AbstractCegarLoop]: Abstraction has has 135 places, 181 transitions, 1140 flow [2023-12-05 21:04:07,666 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,666 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:07,666 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:07,666 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:04:07,667 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:07,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:07,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1400017933, now seen corresponding path program 1 times [2023-12-05 21:04:07,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:07,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097830994] [2023-12-05 21:04:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:07,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:07,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097830994] [2023-12-05 21:04:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097830994] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:07,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:07,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:07,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586467200] [2023-12-05 21:04:07,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:07,802 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:07,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:07,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:07,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:07,803 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 157 [2023-12-05 21:04:07,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 181 transitions, 1140 flow. Second operand has 6 states, 6 states have (on average 86.33333333333333) internal successors, (518), 6 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:07,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 157 [2023-12-05 21:04:07,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:07,958 INFO L124 PetriNetUnfolderBase]: 100/544 cut-off events. [2023-12-05 21:04:07,959 INFO L125 PetriNetUnfolderBase]: For 663/713 co-relation queries the response was YES. [2023-12-05 21:04:07,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1763 conditions, 544 events. 100/544 cut-off events. For 663/713 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2595 event pairs, 26 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 1670. Up to 224 conditions per place. [2023-12-05 21:04:07,962 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 85 selfloop transitions, 10 changer transitions 0/176 dead transitions. [2023-12-05 21:04:07,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 176 transitions, 1282 flow [2023-12-05 21:04:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:04:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:04:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 494 transitions. [2023-12-05 21:04:07,963 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6292993630573248 [2023-12-05 21:04:07,963 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 494 transitions. [2023-12-05 21:04:07,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 494 transitions. [2023-12-05 21:04:07,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:07,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 494 transitions. [2023-12-05 21:04:07,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,966 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,967 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -13 predicate places. [2023-12-05 21:04:07,967 INFO L500 AbstractCegarLoop]: Abstraction has has 136 places, 176 transitions, 1282 flow [2023-12-05 21:04:07,967 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.33333333333333) internal successors, (518), 6 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,967 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:07,967 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:07,967 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:04:07,967 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:07,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:07,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1400017934, now seen corresponding path program 1 times [2023-12-05 21:04:07,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:07,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566313869] [2023-12-05 21:04:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:07,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:08,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:08,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566313869] [2023-12-05 21:04:08,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566313869] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:08,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:08,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:04:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126452931] [2023-12-05 21:04:08,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:08,043 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:04:08,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:08,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:04:08,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:04:08,044 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 157 [2023-12-05 21:04:08,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 176 transitions, 1282 flow. Second operand has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:08,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 157 [2023-12-05 21:04:08,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:08,173 INFO L124 PetriNetUnfolderBase]: 91/518 cut-off events. [2023-12-05 21:04:08,174 INFO L125 PetriNetUnfolderBase]: For 974/1038 co-relation queries the response was YES. [2023-12-05 21:04:08,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1830 conditions, 518 events. 91/518 cut-off events. For 974/1038 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2389 event pairs, 22 based on Foata normal form. 2/392 useless extension candidates. Maximal degree in co-relation 1724. Up to 197 conditions per place. [2023-12-05 21:04:08,176 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 83 selfloop transitions, 4 changer transitions 0/167 dead transitions. [2023-12-05 21:04:08,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 167 transitions, 1352 flow [2023-12-05 21:04:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:04:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:04:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 498 transitions. [2023-12-05 21:04:08,178 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6343949044585987 [2023-12-05 21:04:08,178 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 498 transitions. [2023-12-05 21:04:08,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 498 transitions. [2023-12-05 21:04:08,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:08,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 498 transitions. [2023-12-05 21:04:08,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,180 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,181 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -13 predicate places. [2023-12-05 21:04:08,181 INFO L500 AbstractCegarLoop]: Abstraction has has 136 places, 167 transitions, 1352 flow [2023-12-05 21:04:08,181 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,181 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:08,181 INFO L233 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] [2023-12-05 21:04:08,182 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:04:08,182 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:08,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash 405708083, now seen corresponding path program 1 times [2023-12-05 21:04:08,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:08,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769841163] [2023-12-05 21:04:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:08,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:08,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:08,209 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:08,210 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:08,210 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (78 of 79 remaining) [2023-12-05 21:04:08,212 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 79 remaining) [2023-12-05 21:04:08,212 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 79 remaining) [2023-12-05 21:04:08,212 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 79 remaining) [2023-12-05 21:04:08,212 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 79 remaining) [2023-12-05 21:04:08,212 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 79 remaining) [2023-12-05 21:04:08,212 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 79 remaining) [2023-12-05 21:04:08,212 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 79 remaining) [2023-12-05 21:04:08,213 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 79 remaining) [2023-12-05 21:04:08,214 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 79 remaining) [2023-12-05 21:04:08,215 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 79 remaining) [2023-12-05 21:04:08,216 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 79 remaining) [2023-12-05 21:04:08,217 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (15 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (12 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 79 remaining) [2023-12-05 21:04:08,218 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 79 remaining) [2023-12-05 21:04:08,219 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 79 remaining) [2023-12-05 21:04:08,219 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 79 remaining) [2023-12-05 21:04:08,219 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 79 remaining) [2023-12-05 21:04:08,219 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 79 remaining) [2023-12-05 21:04:08,219 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 79 remaining) [2023-12-05 21:04:08,219 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 79 remaining) [2023-12-05 21:04:08,219 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:04:08,220 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:08,222 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:08,222 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:04:08,283 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:08,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 277 transitions, 564 flow [2023-12-05 21:04:08,313 INFO L124 PetriNetUnfolderBase]: 23/305 cut-off events. [2023-12-05 21:04:08,313 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:04:08,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 305 events. 23/305 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 901 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-12-05 21:04:08,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 277 transitions, 564 flow [2023-12-05 21:04:08,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 277 transitions, 564 flow [2023-12-05 21:04:08,322 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:08,322 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;@1c6de528, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:08,322 INFO L363 AbstractCegarLoop]: Starting to check reachability of 117 error locations. [2023-12-05 21:04:08,324 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:08,324 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-12-05 21:04:08,324 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:08,324 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:08,324 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:08,324 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:08,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1440196695, now seen corresponding path program 1 times [2023-12-05 21:04:08,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:08,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506408932] [2023-12-05 21:04:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:08,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:08,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:08,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506408932] [2023-12-05 21:04:08,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506408932] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:08,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:08,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723665946] [2023-12-05 21:04:08,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:08,345 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:08,346 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 277 [2023-12-05 21:04:08,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 277 transitions, 564 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:08,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 277 [2023-12-05 21:04:08,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:12,418 INFO L124 PetriNetUnfolderBase]: 16804/40963 cut-off events. [2023-12-05 21:04:12,418 INFO L125 PetriNetUnfolderBase]: For 295/295 co-relation queries the response was YES. [2023-12-05 21:04:12,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65682 conditions, 40963 events. 16804/40963 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 1276. Compared 462757 event pairs, 6551 based on Foata normal form. 3825/27304 useless extension candidates. Maximal degree in co-relation 28286. Up to 13782 conditions per place. [2023-12-05 21:04:12,742 INFO L140 encePairwiseOnDemand]: 236/277 looper letters, 154 selfloop transitions, 6 changer transitions 0/307 dead transitions. [2023-12-05 21:04:12,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 307 transitions, 949 flow [2023-12-05 21:04:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2023-12-05 21:04:12,757 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8279181708784596 [2023-12-05 21:04:12,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2023-12-05 21:04:12,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2023-12-05 21:04:12,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:12,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2023-12-05 21:04:12,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:12,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:12,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:12,761 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -34 predicate places. [2023-12-05 21:04:12,761 INFO L500 AbstractCegarLoop]: Abstraction has has 227 places, 307 transitions, 949 flow [2023-12-05 21:04:12,761 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:12,761 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:12,761 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:12,761 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:04:12,762 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:12,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1440196696, now seen corresponding path program 1 times [2023-12-05 21:04:12,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:12,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931674345] [2023-12-05 21:04:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:12,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:12,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:12,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931674345] [2023-12-05 21:04:12,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931674345] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:12,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:12,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254235377] [2023-12-05 21:04:12,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:12,838 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:12,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:12,839 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 277 [2023-12-05 21:04:12,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 307 transitions, 949 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:12,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:12,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 277 [2023-12-05 21:04:12,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:16,146 INFO L124 PetriNetUnfolderBase]: 12632/30406 cut-off events. [2023-12-05 21:04:16,146 INFO L125 PetriNetUnfolderBase]: For 3250/5178 co-relation queries the response was YES. [2023-12-05 21:04:16,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66119 conditions, 30406 events. 12632/30406 cut-off events. For 3250/5178 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 322652 event pairs, 5090 based on Foata normal form. 0/18979 useless extension candidates. Maximal degree in co-relation 30015. Up to 17268 conditions per place. [2023-12-05 21:04:16,347 INFO L140 encePairwiseOnDemand]: 275/277 looper letters, 144 selfloop transitions, 1 changer transitions 0/305 dead transitions. [2023-12-05 21:04:16,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 305 transitions, 1231 flow [2023-12-05 21:04:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-12-05 21:04:16,349 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6738868832731648 [2023-12-05 21:04:16,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-12-05 21:04:16,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-12-05 21:04:16,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:16,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-12-05 21:04:16,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,353 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -33 predicate places. [2023-12-05 21:04:16,353 INFO L500 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 1231 flow [2023-12-05 21:04:16,354 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,354 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:16,354 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:16,354 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:04:16,354 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:16,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:16,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1822362506, now seen corresponding path program 1 times [2023-12-05 21:04:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:16,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898401567] [2023-12-05 21:04:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:16,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:16,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:16,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898401567] [2023-12-05 21:04:16,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898401567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:16,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:16,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:16,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521143914] [2023-12-05 21:04:16,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:16,477 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:16,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:16,478 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 277 [2023-12-05 21:04:16,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 305 transitions, 1231 flow. Second operand has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:16,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 277 [2023-12-05 21:04:16,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:21,356 INFO L124 PetriNetUnfolderBase]: 18682/46987 cut-off events. [2023-12-05 21:04:21,357 INFO L125 PetriNetUnfolderBase]: For 13396/19968 co-relation queries the response was YES. [2023-12-05 21:04:21,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127272 conditions, 46987 events. 18682/46987 cut-off events. For 13396/19968 co-relation queries the response was YES. Maximal size of possible extension queue 1598. Compared 559545 event pairs, 4121 based on Foata normal form. 39/30254 useless extension candidates. Maximal degree in co-relation 75070. Up to 25235 conditions per place. [2023-12-05 21:04:21,799 INFO L140 encePairwiseOnDemand]: 258/277 looper letters, 271 selfloop transitions, 19 changer transitions 0/431 dead transitions. [2023-12-05 21:04:21,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 431 transitions, 2532 flow [2023-12-05 21:04:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:04:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:04:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1051 transitions. [2023-12-05 21:04:21,802 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6323706377858003 [2023-12-05 21:04:21,802 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1051 transitions. [2023-12-05 21:04:21,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1051 transitions. [2023-12-05 21:04:21,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:21,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1051 transitions. [2023-12-05 21:04:21,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.16666666666666) internal successors, (1051), 6 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:21,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:21,806 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 277.0) internal successors, (1939), 7 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:21,807 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -32 predicate places. [2023-12-05 21:04:21,808 INFO L500 AbstractCegarLoop]: Abstraction has has 229 places, 431 transitions, 2532 flow [2023-12-05 21:04:21,808 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:21,808 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:21,808 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:21,808 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:04:21,808 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:21,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1613601181, now seen corresponding path program 1 times [2023-12-05 21:04:21,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:21,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268642531] [2023-12-05 21:04:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:21,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:21,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268642531] [2023-12-05 21:04:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268642531] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:21,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:21,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:04:21,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674143891] [2023-12-05 21:04:21,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:21,889 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:04:21,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:04:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:04:21,891 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 277 [2023-12-05 21:04:21,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 431 transitions, 2532 flow. Second operand has 5 states, 5 states have (on average 152.6) internal successors, (763), 5 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:21,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:21,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 277 [2023-12-05 21:04:21,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:26,959 INFO L124 PetriNetUnfolderBase]: 16294/42323 cut-off events. [2023-12-05 21:04:26,960 INFO L125 PetriNetUnfolderBase]: For 26200/39538 co-relation queries the response was YES. [2023-12-05 21:04:27,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137015 conditions, 42323 events. 16294/42323 cut-off events. For 26200/39538 co-relation queries the response was YES. Maximal size of possible extension queue 1307. Compared 502357 event pairs, 3820 based on Foata normal form. 688/29146 useless extension candidates. Maximal degree in co-relation 80029. Up to 21744 conditions per place. [2023-12-05 21:04:27,295 INFO L140 encePairwiseOnDemand]: 257/277 looper letters, 304 selfloop transitions, 6 changer transitions 0/452 dead transitions. [2023-12-05 21:04:27,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 452 transitions, 3312 flow [2023-12-05 21:04:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:04:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:04:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 899 transitions. [2023-12-05 21:04:27,299 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6490974729241877 [2023-12-05 21:04:27,299 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 899 transitions. [2023-12-05 21:04:27,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 899 transitions. [2023-12-05 21:04:27,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:27,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 899 transitions. [2023-12-05 21:04:27,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.8) internal successors, (899), 5 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,308 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,309 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -36 predicate places. [2023-12-05 21:04:27,309 INFO L500 AbstractCegarLoop]: Abstraction has has 225 places, 452 transitions, 3312 flow [2023-12-05 21:04:27,309 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.6) internal successors, (763), 5 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,310 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:27,310 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2023-12-05 21:04:27,310 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:04:27,310 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:27,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1523270030, now seen corresponding path program 1 times [2023-12-05 21:04:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:27,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701812262] [2023-12-05 21:04:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:27,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:27,325 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:27,344 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:27,344 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:27,344 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (116 of 117 remaining) [2023-12-05 21:04:27,344 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 117 remaining) [2023-12-05 21:04:27,344 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 117 remaining) [2023-12-05 21:04:27,344 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 117 remaining) [2023-12-05 21:04:27,345 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (93 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (90 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 117 remaining) [2023-12-05 21:04:27,346 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 117 remaining) [2023-12-05 21:04:27,347 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (53 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (50 of 117 remaining) [2023-12-05 21:04:27,348 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 117 remaining) [2023-12-05 21:04:27,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (15 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (12 of 117 remaining) [2023-12-05 21:04:27,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 117 remaining) [2023-12-05 21:04:27,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 117 remaining) [2023-12-05 21:04:27,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 117 remaining) [2023-12-05 21:04:27,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 117 remaining) [2023-12-05 21:04:27,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 117 remaining) [2023-12-05 21:04:27,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 117 remaining) [2023-12-05 21:04:27,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 117 remaining) [2023-12-05 21:04:27,352 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 117 remaining) [2023-12-05 21:04:27,353 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 117 remaining) [2023-12-05 21:04:27,353 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 117 remaining) [2023-12-05 21:04:27,353 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 117 remaining) [2023-12-05 21:04:27,353 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 117 remaining) [2023-12-05 21:04:27,353 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:04:27,353 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:04:27,354 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:27,354 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:04:27,459 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:27,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 397 transitions, 812 flow [2023-12-05 21:04:27,514 INFO L124 PetriNetUnfolderBase]: 34/440 cut-off events. [2023-12-05 21:04:27,514 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:04:27,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 440 events. 34/440 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1652 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 372. Up to 8 conditions per place. [2023-12-05 21:04:27,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 373 places, 397 transitions, 812 flow [2023-12-05 21:04:27,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 397 transitions, 812 flow [2023-12-05 21:04:27,532 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:27,532 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;@1c6de528, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:27,532 INFO L363 AbstractCegarLoop]: Starting to check reachability of 155 error locations. [2023-12-05 21:04:27,533 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:27,533 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-12-05 21:04:27,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:27,533 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:27,533 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:27,534 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 152 more)] === [2023-12-05 21:04:27,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash 848533092, now seen corresponding path program 1 times [2023-12-05 21:04:27,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:27,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834881120] [2023-12-05 21:04:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:27,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:27,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:27,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834881120] [2023-12-05 21:04:27,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834881120] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:27,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:27,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:27,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722938319] [2023-12-05 21:04:27,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:27,557 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:27,558 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 397 [2023-12-05 21:04:27,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 397 transitions, 812 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:27,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 397 [2023-12-05 21:04:27,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand