/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_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:03:51,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:03:51,934 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 21:03:51,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:03:51,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:03:51,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:03:51,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:03:51,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:03:51,960 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:03:51,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:03:51,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:03:51,964 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:03:51,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:03:51,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:03:51,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:03:51,965 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:03:51,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:03:51,965 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:03:51,965 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:03:51,966 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:03:51,966 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:03:51,966 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:03:51,966 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:03:51,966 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:03:51,967 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:03:51,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:03:51,967 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:03:51,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:03:51,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:03:51,967 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:03:51,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:03:51,968 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:03:51,968 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:03:51,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:03:52,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:03:52,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:03:52,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:03:52,175 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:03:52,176 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:03:52,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2023-12-05 21:03:53,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:03:53,371 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:03:53,371 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-1.i [2023-12-05 21:03:53,386 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea5c4aba/36f5aca2c7f34c8e8a7196871e76feb7/FLAG703b06294 [2023-12-05 21:03:53,396 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea5c4aba/36f5aca2c7f34c8e8a7196871e76feb7 [2023-12-05 21:03:53,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:03:53,399 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:03:53,400 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:03:53,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:03:53,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:03:53,403 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,404 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a61832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53, skipping insertion in model container [2023-12-05 21:03:53,404 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,460 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:03:53,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:03:53,681 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:03:53,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:03:53,771 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:03:53,771 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:03:53,776 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:03:53,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53 WrapperNode [2023-12-05 21:03:53,777 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:03:53,778 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:03:53,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:03:53,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:03:53,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,826 INFO L138 Inliner]: procedures = 179, calls = 50, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 194 [2023-12-05 21:03:53,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:03:53,827 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:03:53,827 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:03:53,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:03:53,833 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,840 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,843 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,844 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,847 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:03:53,848 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:03:53,848 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:03:53,848 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:03:53,848 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (1/1) ... [2023-12-05 21:03:53,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:03:53,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:03:53,878 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 21:03:53,889 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 21:03:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:03:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:03:53,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:03:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:03:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:03:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:03:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:03:53,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:03:53,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:03:53,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:03:53,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:03:53,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:03:53,910 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 21:03:54,005 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:03:54,007 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:03:54,263 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:03:54,438 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:03:54,438 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-05 21:03:54,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:03:54 BoogieIcfgContainer [2023-12-05 21:03:54,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:03:54,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:03:54,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:03:54,444 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:03:54,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:03:53" (1/3) ... [2023-12-05 21:03:54,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795fa2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:03:54, skipping insertion in model container [2023-12-05 21:03:54,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:53" (2/3) ... [2023-12-05 21:03:54,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795fa2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:03:54, skipping insertion in model container [2023-12-05 21:03:54,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:03:54" (3/3) ... [2023-12-05 21:03:54,447 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-1.i [2023-12-05 21:03:54,461 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:03:54,461 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 40 error locations. [2023-12-05 21:03:54,462 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:03:54,552 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:03:54,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 157 transitions, 318 flow [2023-12-05 21:03:54,638 INFO L124 PetriNetUnfolderBase]: 12/170 cut-off events. [2023-12-05 21:03:54,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:03:54,646 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 21:03:54,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 157 transitions, 318 flow [2023-12-05 21:03:54,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 157 transitions, 318 flow [2023-12-05 21:03:54,656 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:03:54,660 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;@3cb10604, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:03:54,660 INFO L363 AbstractCegarLoop]: Starting to check reachability of 79 error locations. [2023-12-05 21:03:54,665 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:03:54,665 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-12-05 21:03:54,665 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:03:54,665 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:54,666 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] [2023-12-05 21:03:54,666 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 21:03:54,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2139027774, now seen corresponding path program 1 times [2023-12-05 21:03:54,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:54,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050100068] [2023-12-05 21:03:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:54,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:54,914 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 21:03:54,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:54,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050100068] [2023-12-05 21:03:54,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050100068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:54,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:54,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:54,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229909148] [2023-12-05 21:03:54,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:54,923 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:54,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:54,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:54,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:54,951 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 157 [2023-12-05 21:03:54,954 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 21:03:54,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:54,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 157 [2023-12-05 21:03:54,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:55,198 INFO L124 PetriNetUnfolderBase]: 171/713 cut-off events. [2023-12-05 21:03:55,198 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:03:55,203 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 21:03:55,208 INFO L140 encePairwiseOnDemand]: 134/157 looper letters, 74 selfloop transitions, 4 changer transitions 0/161 dead transitions. [2023-12-05 21:03:55,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 161 transitions, 482 flow [2023-12-05 21:03:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:03:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:03:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-12-05 21:03:55,223 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7898089171974523 [2023-12-05 21:03:55,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-12-05 21:03:55,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-12-05 21:03:55,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:55,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-12-05 21:03:55,232 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 21:03:55,235 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 21:03:55,236 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 21:03:55,239 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -19 predicate places. [2023-12-05 21:03:55,239 INFO L500 AbstractCegarLoop]: Abstraction has has 130 places, 161 transitions, 482 flow [2023-12-05 21:03:55,239 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 21:03:55,239 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:55,239 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 21:03:55,239 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:03:55,240 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 21:03:55,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2139027773, now seen corresponding path program 1 times [2023-12-05 21:03:55,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:55,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728286440] [2023-12-05 21:03:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:55,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:55,359 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 21:03:55,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:55,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728286440] [2023-12-05 21:03:55,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728286440] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:55,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:55,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911148511] [2023-12-05 21:03:55,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:55,361 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:55,362 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 157 [2023-12-05 21:03:55,363 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 21:03:55,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:55,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 157 [2023-12-05 21:03:55,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:55,463 INFO L124 PetriNetUnfolderBase]: 110/501 cut-off events. [2023-12-05 21:03:55,463 INFO L125 PetriNetUnfolderBase]: For 55/77 co-relation queries the response was YES. [2023-12-05 21:03:55,464 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 21:03:55,466 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 69 selfloop transitions, 1 changer transitions 0/159 dead transitions. [2023-12-05 21:03:55,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 159 transitions, 614 flow [2023-12-05 21:03:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:03:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:03:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-12-05 21:03:55,468 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6751592356687898 [2023-12-05 21:03:55,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-12-05 21:03:55,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-12-05 21:03:55,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:55,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-12-05 21:03:55,470 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 21:03:55,472 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 21:03:55,472 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 21:03:55,473 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -18 predicate places. [2023-12-05 21:03:55,473 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 614 flow [2023-12-05 21:03:55,473 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 21:03:55,473 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:55,473 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 21:03:55,473 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:03:55,473 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:03:55,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:55,475 INFO L85 PathProgramCache]: Analyzing trace with hash 654146078, now seen corresponding path program 1 times [2023-12-05 21:03:55,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:55,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023797397] [2023-12-05 21:03:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:55,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:55,629 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 21:03:55,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:55,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023797397] [2023-12-05 21:03:55,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023797397] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:55,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:55,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:03:55,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087125760] [2023-12-05 21:03:55,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:55,632 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:03:55,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:55,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:03:55,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:03:55,636 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 157 [2023-12-05 21:03:55,637 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 21:03:55,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:55,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 157 [2023-12-05 21:03:55,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:55,847 INFO L124 PetriNetUnfolderBase]: 112/552 cut-off events. [2023-12-05 21:03:55,847 INFO L125 PetriNetUnfolderBase]: For 191/245 co-relation queries the response was YES. [2023-12-05 21:03:55,851 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 21:03:55,854 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 97 selfloop transitions, 4 changer transitions 0/182 dead transitions. [2023-12-05 21:03:55,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 948 flow [2023-12-05 21:03:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:03:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:03:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-12-05 21:03:55,855 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.660828025477707 [2023-12-05 21:03:55,855 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-12-05 21:03:55,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-12-05 21:03:55,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:55,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-12-05 21:03:55,856 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 21:03:55,857 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 21:03:55,858 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 21:03:55,859 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -17 predicate places. [2023-12-05 21:03:55,859 INFO L500 AbstractCegarLoop]: Abstraction has has 132 places, 182 transitions, 948 flow [2023-12-05 21:03:55,859 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 21:03:55,859 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:55,859 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 21:03:55,860 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:03:55,860 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:03:55,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:55,860 INFO L85 PathProgramCache]: Analyzing trace with hash 654146079, now seen corresponding path program 1 times [2023-12-05 21:03:55,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:55,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722071480] [2023-12-05 21:03:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:55,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:56,042 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 21:03:56,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:56,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722071480] [2023-12-05 21:03:56,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722071480] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:56,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:56,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:03:56,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044374061] [2023-12-05 21:03:56,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:56,044 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:03:56,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:03:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:03:56,045 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 157 [2023-12-05 21:03:56,046 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 21:03:56,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:56,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 157 [2023-12-05 21:03:56,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:56,214 INFO L124 PetriNetUnfolderBase]: 110/546 cut-off events. [2023-12-05 21:03:56,214 INFO L125 PetriNetUnfolderBase]: For 385/461 co-relation queries the response was YES. [2023-12-05 21:03:56,215 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 21:03:56,217 INFO L140 encePairwiseOnDemand]: 150/157 looper letters, 97 selfloop transitions, 5 changer transitions 0/181 dead transitions. [2023-12-05 21:03:56,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 181 transitions, 1140 flow [2023-12-05 21:03:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:03:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:03:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 574 transitions. [2023-12-05 21:03:56,219 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6093418259023354 [2023-12-05 21:03:56,219 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 574 transitions. [2023-12-05 21:03:56,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 574 transitions. [2023-12-05 21:03:56,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:56,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 574 transitions. [2023-12-05 21:03:56,220 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 21:03:56,222 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 21:03:56,222 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 21:03:56,223 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -14 predicate places. [2023-12-05 21:03:56,223 INFO L500 AbstractCegarLoop]: Abstraction has has 135 places, 181 transitions, 1140 flow [2023-12-05 21:03:56,223 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 21:03:56,223 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:56,223 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 21:03:56,223 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:03:56,224 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:03:56,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:56,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1400017933, now seen corresponding path program 1 times [2023-12-05 21:03:56,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:56,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721726799] [2023-12-05 21:03:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:56,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:56,295 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 21:03:56,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:56,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721726799] [2023-12-05 21:03:56,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721726799] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:56,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:56,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:03:56,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434907952] [2023-12-05 21:03:56,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:56,297 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:03:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:03:56,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:03:56,299 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 157 [2023-12-05 21:03:56,299 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 21:03:56,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:56,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 157 [2023-12-05 21:03:56,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:56,473 INFO L124 PetriNetUnfolderBase]: 100/544 cut-off events. [2023-12-05 21:03:56,473 INFO L125 PetriNetUnfolderBase]: For 663/713 co-relation queries the response was YES. [2023-12-05 21:03:56,474 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 21:03:56,476 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 85 selfloop transitions, 10 changer transitions 0/176 dead transitions. [2023-12-05 21:03:56,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 176 transitions, 1282 flow [2023-12-05 21:03:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:03:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:03:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 494 transitions. [2023-12-05 21:03:56,478 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6292993630573248 [2023-12-05 21:03:56,478 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 494 transitions. [2023-12-05 21:03:56,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 494 transitions. [2023-12-05 21:03:56,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:56,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 494 transitions. [2023-12-05 21:03:56,479 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 21:03:56,480 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 21:03:56,481 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 21:03:56,482 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -13 predicate places. [2023-12-05 21:03:56,483 INFO L500 AbstractCegarLoop]: Abstraction has has 136 places, 176 transitions, 1282 flow [2023-12-05 21:03:56,483 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 21:03:56,483 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:56,483 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 21:03:56,483 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:03:56,483 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:03:56,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1400017934, now seen corresponding path program 1 times [2023-12-05 21:03:56,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:56,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327702787] [2023-12-05 21:03:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:56,616 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 21:03:56,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:56,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327702787] [2023-12-05 21:03:56,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327702787] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:56,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:56,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:03:56,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532477641] [2023-12-05 21:03:56,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:56,618 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:03:56,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:56,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:03:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:03:56,619 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 157 [2023-12-05 21:03:56,619 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 21:03:56,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:56,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 157 [2023-12-05 21:03:56,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:56,749 INFO L124 PetriNetUnfolderBase]: 91/518 cut-off events. [2023-12-05 21:03:56,750 INFO L125 PetriNetUnfolderBase]: For 974/1038 co-relation queries the response was YES. [2023-12-05 21:03:56,751 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 21:03:56,753 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 83 selfloop transitions, 4 changer transitions 0/167 dead transitions. [2023-12-05 21:03:56,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 167 transitions, 1352 flow [2023-12-05 21:03:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:03:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:03:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 498 transitions. [2023-12-05 21:03:56,755 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6343949044585987 [2023-12-05 21:03:56,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 498 transitions. [2023-12-05 21:03:56,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 498 transitions. [2023-12-05 21:03:56,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:56,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 498 transitions. [2023-12-05 21:03:56,756 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 21:03:56,757 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 21:03:56,759 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 21:03:56,761 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -13 predicate places. [2023-12-05 21:03:56,761 INFO L500 AbstractCegarLoop]: Abstraction has has 136 places, 167 transitions, 1352 flow [2023-12-05 21:03:56,761 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 21:03:56,761 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:56,762 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 21:03:56,762 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:03:56,762 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 21:03:56,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash 405708083, now seen corresponding path program 1 times [2023-12-05 21:03:56,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:56,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807599409] [2023-12-05 21:03:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:56,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:03:56,777 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:03:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:03:56,801 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:03:56,802 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:03:56,802 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (78 of 79 remaining) [2023-12-05 21:03:56,804 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 79 remaining) [2023-12-05 21:03:56,807 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 79 remaining) [2023-12-05 21:03:56,807 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 79 remaining) [2023-12-05 21:03:56,807 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 79 remaining) [2023-12-05 21:03:56,807 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 79 remaining) [2023-12-05 21:03:56,807 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 79 remaining) [2023-12-05 21:03:56,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 79 remaining) [2023-12-05 21:03:56,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 79 remaining) [2023-12-05 21:03:56,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 79 remaining) [2023-12-05 21:03:56,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 79 remaining) [2023-12-05 21:03:56,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 79 remaining) [2023-12-05 21:03:56,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 79 remaining) [2023-12-05 21:03:56,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 79 remaining) [2023-12-05 21:03:56,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 79 remaining) [2023-12-05 21:03:56,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 79 remaining) [2023-12-05 21:03:56,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 79 remaining) [2023-12-05 21:03:56,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 79 remaining) [2023-12-05 21:03:56,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 79 remaining) [2023-12-05 21:03:56,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 79 remaining) [2023-12-05 21:03:56,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 79 remaining) [2023-12-05 21:03:56,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 79 remaining) [2023-12-05 21:03:56,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 79 remaining) [2023-12-05 21:03:56,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 79 remaining) [2023-12-05 21:03:56,810 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 79 remaining) [2023-12-05 21:03:56,810 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 79 remaining) [2023-12-05 21:03:56,810 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 79 remaining) [2023-12-05 21:03:56,810 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 79 remaining) [2023-12-05 21:03:56,810 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 79 remaining) [2023-12-05 21:03:56,810 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 79 remaining) [2023-12-05 21:03:56,810 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 79 remaining) [2023-12-05 21:03:56,810 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 79 remaining) [2023-12-05 21:03:56,811 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 79 remaining) [2023-12-05 21:03:56,811 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 79 remaining) [2023-12-05 21:03:56,812 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 79 remaining) [2023-12-05 21:03:56,813 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 79 remaining) [2023-12-05 21:03:56,813 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 79 remaining) [2023-12-05 21:03:56,813 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 79 remaining) [2023-12-05 21:03:56,813 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 79 remaining) [2023-12-05 21:03:56,813 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 79 remaining) [2023-12-05 21:03:56,813 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 79 remaining) [2023-12-05 21:03:56,813 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 79 remaining) [2023-12-05 21:03:56,813 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 79 remaining) [2023-12-05 21:03:56,814 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 79 remaining) [2023-12-05 21:03:56,815 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 79 remaining) [2023-12-05 21:03:56,815 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 79 remaining) [2023-12-05 21:03:56,815 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 79 remaining) [2023-12-05 21:03:56,815 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 79 remaining) [2023-12-05 21:03:56,815 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 79 remaining) [2023-12-05 21:03:56,815 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 79 remaining) [2023-12-05 21:03:56,815 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 79 remaining) [2023-12-05 21:03:56,815 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 79 remaining) [2023-12-05 21:03:56,815 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (15 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (12 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 79 remaining) [2023-12-05 21:03:56,816 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 79 remaining) [2023-12-05 21:03:56,817 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 79 remaining) [2023-12-05 21:03:56,817 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 79 remaining) [2023-12-05 21:03:56,817 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 79 remaining) [2023-12-05 21:03:56,817 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 79 remaining) [2023-12-05 21:03:56,817 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 79 remaining) [2023-12-05 21:03:56,817 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 79 remaining) [2023-12-05 21:03:56,817 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 79 remaining) [2023-12-05 21:03:56,817 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:03:56,818 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:56,820 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:03:56,820 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:03:56,885 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:03:56,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 277 transitions, 564 flow [2023-12-05 21:03:56,916 INFO L124 PetriNetUnfolderBase]: 23/305 cut-off events. [2023-12-05 21:03:56,916 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:03:56,918 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 21:03:56,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 277 transitions, 564 flow [2023-12-05 21:03:56,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 277 transitions, 564 flow [2023-12-05 21:03:56,923 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:03:56,923 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;@3cb10604, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:03:56,924 INFO L363 AbstractCegarLoop]: Starting to check reachability of 117 error locations. [2023-12-05 21:03:56,925 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:03:56,925 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-12-05 21:03:56,925 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:03:56,925 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:56,925 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 21:03:56,926 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 21:03:56,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1440196695, now seen corresponding path program 1 times [2023-12-05 21:03:56,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:56,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463586473] [2023-12-05 21:03:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:56,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:56,945 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 21:03:56,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:56,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463586473] [2023-12-05 21:03:56,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463586473] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:56,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:56,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:56,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735164742] [2023-12-05 21:03:56,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:56,946 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:56,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:56,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:56,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:56,947 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 277 [2023-12-05 21:03:56,948 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 21:03:56,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:56,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 277 [2023-12-05 21:03:56,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:00,996 INFO L124 PetriNetUnfolderBase]: 16804/40963 cut-off events. [2023-12-05 21:04:00,996 INFO L125 PetriNetUnfolderBase]: For 295/295 co-relation queries the response was YES. [2023-12-05 21:04:01,073 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 21:04:01,404 INFO L140 encePairwiseOnDemand]: 236/277 looper letters, 154 selfloop transitions, 6 changer transitions 0/307 dead transitions. [2023-12-05 21:04:01,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 307 transitions, 949 flow [2023-12-05 21:04:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:01,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2023-12-05 21:04:01,407 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8279181708784596 [2023-12-05 21:04:01,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2023-12-05 21:04:01,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2023-12-05 21:04:01,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:01,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2023-12-05 21:04:01,408 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 21:04:01,409 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 21:04:01,410 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 21:04:01,410 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -34 predicate places. [2023-12-05 21:04:01,410 INFO L500 AbstractCegarLoop]: Abstraction has has 227 places, 307 transitions, 949 flow [2023-12-05 21:04:01,410 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 21:04:01,411 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:01,411 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 21:04:01,411 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:04:01,411 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 21:04:01,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:01,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1440196696, now seen corresponding path program 1 times [2023-12-05 21:04:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:01,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015713442] [2023-12-05 21:04:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:01,441 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 21:04:01,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:01,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015713442] [2023-12-05 21:04:01,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015713442] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:01,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:01,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433768716] [2023-12-05 21:04:01,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:01,443 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:01,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:01,444 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 277 [2023-12-05 21:04:01,444 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 21:04:01,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:01,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 277 [2023-12-05 21:04:01,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:04,311 INFO L124 PetriNetUnfolderBase]: 12632/30406 cut-off events. [2023-12-05 21:04:04,311 INFO L125 PetriNetUnfolderBase]: For 3250/5178 co-relation queries the response was YES. [2023-12-05 21:04:04,360 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 21:04:04,506 INFO L140 encePairwiseOnDemand]: 275/277 looper letters, 144 selfloop transitions, 1 changer transitions 0/305 dead transitions. [2023-12-05 21:04:04,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 305 transitions, 1231 flow [2023-12-05 21:04:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-12-05 21:04:04,508 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6738868832731648 [2023-12-05 21:04:04,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-12-05 21:04:04,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-12-05 21:04:04,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:04,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-12-05 21:04:04,510 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 21:04:04,511 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 21:04:04,511 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 21:04:04,512 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -33 predicate places. [2023-12-05 21:04:04,513 INFO L500 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 1231 flow [2023-12-05 21:04:04,513 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 21:04:04,513 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:04,513 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 21:04:04,513 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:04:04,513 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:04,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:04,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1822362506, now seen corresponding path program 1 times [2023-12-05 21:04:04,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:04,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458310270] [2023-12-05 21:04:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:04,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:04,619 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 21:04:04,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:04,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458310270] [2023-12-05 21:04:04,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458310270] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:04,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:04,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:04,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548591565] [2023-12-05 21:04:04,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:04,621 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:04,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:04,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:04,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:04,622 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 277 [2023-12-05 21:04:04,622 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 21:04:04,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:04,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 277 [2023-12-05 21:04:04,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:09,452 INFO L124 PetriNetUnfolderBase]: 18682/46987 cut-off events. [2023-12-05 21:04:09,452 INFO L125 PetriNetUnfolderBase]: For 13396/19968 co-relation queries the response was YES. [2023-12-05 21:04:09,566 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 21:04:10,024 INFO L140 encePairwiseOnDemand]: 258/277 looper letters, 271 selfloop transitions, 19 changer transitions 0/431 dead transitions. [2023-12-05 21:04:10,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 431 transitions, 2532 flow [2023-12-05 21:04:10,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:04:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:04:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1051 transitions. [2023-12-05 21:04:10,038 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6323706377858003 [2023-12-05 21:04:10,038 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1051 transitions. [2023-12-05 21:04:10,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1051 transitions. [2023-12-05 21:04:10,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:10,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1051 transitions. [2023-12-05 21:04:10,043 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 21:04:10,046 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 21:04:10,046 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 21:04:10,047 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -32 predicate places. [2023-12-05 21:04:10,047 INFO L500 AbstractCegarLoop]: Abstraction has has 229 places, 431 transitions, 2532 flow [2023-12-05 21:04:10,047 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 21:04:10,047 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:10,048 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 21:04:10,048 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:04:10,048 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:10,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1613601181, now seen corresponding path program 1 times [2023-12-05 21:04:10,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:10,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688172688] [2023-12-05 21:04:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:10,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:10,119 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 21:04:10,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:10,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688172688] [2023-12-05 21:04:10,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688172688] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:10,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:04:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833791364] [2023-12-05 21:04:10,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:10,120 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:04:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:04:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:04:10,122 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 277 [2023-12-05 21:04:10,122 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 21:04:10,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:10,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 277 [2023-12-05 21:04:10,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:15,075 INFO L124 PetriNetUnfolderBase]: 16294/42323 cut-off events. [2023-12-05 21:04:15,076 INFO L125 PetriNetUnfolderBase]: For 26200/39538 co-relation queries the response was YES. [2023-12-05 21:04:15,173 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 21:04:15,421 INFO L140 encePairwiseOnDemand]: 257/277 looper letters, 304 selfloop transitions, 6 changer transitions 0/452 dead transitions. [2023-12-05 21:04:15,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 452 transitions, 3312 flow [2023-12-05 21:04:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:04:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:04:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 899 transitions. [2023-12-05 21:04:15,423 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6490974729241877 [2023-12-05 21:04:15,423 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 899 transitions. [2023-12-05 21:04:15,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 899 transitions. [2023-12-05 21:04:15,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:15,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 899 transitions. [2023-12-05 21:04:15,425 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 21:04:15,427 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 21:04:15,427 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 21:04:15,427 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -36 predicate places. [2023-12-05 21:04:15,427 INFO L500 AbstractCegarLoop]: Abstraction has has 225 places, 452 transitions, 3312 flow [2023-12-05 21:04:15,428 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 21:04:15,428 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:15,428 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 21:04:15,428 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:04:15,428 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 21:04:15,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:15,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1523270030, now seen corresponding path program 1 times [2023-12-05 21:04:15,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:15,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943619277] [2023-12-05 21:04:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:15,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:15,438 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:15,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:15,447 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:15,447 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (116 of 117 remaining) [2023-12-05 21:04:15,447 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 117 remaining) [2023-12-05 21:04:15,447 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 117 remaining) [2023-12-05 21:04:15,447 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 117 remaining) [2023-12-05 21:04:15,447 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 117 remaining) [2023-12-05 21:04:15,447 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 117 remaining) [2023-12-05 21:04:15,447 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 117 remaining) [2023-12-05 21:04:15,447 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 117 remaining) [2023-12-05 21:04:15,447 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 117 remaining) [2023-12-05 21:04:15,448 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (93 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (90 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 117 remaining) [2023-12-05 21:04:15,449 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 117 remaining) [2023-12-05 21:04:15,450 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 117 remaining) [2023-12-05 21:04:15,451 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (53 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (50 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 117 remaining) [2023-12-05 21:04:15,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 117 remaining) [2023-12-05 21:04:15,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 117 remaining) [2023-12-05 21:04:15,454 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (15 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (12 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 117 remaining) [2023-12-05 21:04:15,455 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 117 remaining) [2023-12-05 21:04:15,456 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 117 remaining) [2023-12-05 21:04:15,456 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:04:15,456 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:04:15,456 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:15,457 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:04:15,536 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:15,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 397 transitions, 812 flow [2023-12-05 21:04:15,589 INFO L124 PetriNetUnfolderBase]: 34/440 cut-off events. [2023-12-05 21:04:15,589 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:04:15,595 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 21:04:15,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 373 places, 397 transitions, 812 flow [2023-12-05 21:04:15,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 397 transitions, 812 flow [2023-12-05 21:04:15,605 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:15,605 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;@3cb10604, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:15,605 INFO L363 AbstractCegarLoop]: Starting to check reachability of 155 error locations. [2023-12-05 21:04:15,607 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:15,607 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-12-05 21:04:15,607 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:15,607 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:15,607 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 21:04:15,607 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 21:04:15,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash 848533092, now seen corresponding path program 1 times [2023-12-05 21:04:15,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:15,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932802816] [2023-12-05 21:04:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:15,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:15,633 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 21:04:15,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:15,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932802816] [2023-12-05 21:04:15,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932802816] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:15,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:15,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:15,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491632913] [2023-12-05 21:04:15,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:15,634 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:15,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:15,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:15,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:15,635 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 397 [2023-12-05 21:04:15,635 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 21:04:15,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:15,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 397 [2023-12-05 21:04:15,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand