/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:04:04,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:04:04,208 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:04:04,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:04:04,242 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:04:04,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:04:04,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:04:04,243 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:04:04,243 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:04:04,246 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:04:04,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:04:04,247 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:04:04,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:04:04,248 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:04:04,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:04:04,248 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:04:04,248 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:04:04,248 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:04:04,249 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:04:04,249 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:04:04,249 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:04:04,249 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:04:04,250 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:04:04,250 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:04:04,250 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:04:04,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:04:04,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:04:04,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:04:04,250 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:04:04,251 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:04:04,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:04:04,251 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:04:04,251 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:04:04,252 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:04:04,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:04:04,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:04:04,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:04:04,447 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:04:04,447 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:04:04,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-12-05 21:04:05,394 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:04:05,573 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:04:05,573 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-12-05 21:04:05,585 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea398115b/090ca585dceb455c85cabcdfb46b4f25/FLAG715c8446d [2023-12-05 21:04:05,594 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea398115b/090ca585dceb455c85cabcdfb46b4f25 [2023-12-05 21:04:05,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:04:05,596 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:04:05,597 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:04:05,597 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:04:05,600 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:04:05,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd2f3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05, skipping insertion in model container [2023-12-05 21:04:05,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,641 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:04:05,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:04:05,885 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:04:05,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:04:05,958 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:04:05,958 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:04:05,963 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:04:05,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05 WrapperNode [2023-12-05 21:04:05,963 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:04:05,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:04:05,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:04:05,965 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:04:05,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:05,993 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,021 INFO L138 Inliner]: procedures = 179, calls = 50, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 194 [2023-12-05 21:04:06,021 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:04:06,022 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:04:06,022 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:04:06,022 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:04:06,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,055 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,061 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,063 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,068 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:04:06,069 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:04:06,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:04:06,069 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:04:06,069 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (1/1) ... [2023-12-05 21:04:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:04:06,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:04:06,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:04:06,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:04:06,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:04:06,119 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:04:06,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:04:06,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:04:06,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:04:06,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:04:06,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:04:06,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:04:06,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:04:06,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:04:06,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:04:06,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:04:06,122 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:04:06,207 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:04:06,209 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:04:06,542 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:04:06,724 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:04:06,724 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-05 21:04:06,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:04:06 BoogieIcfgContainer [2023-12-05 21:04:06,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:04:06,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:04:06,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:04:06,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:04:06,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:04:05" (1/3) ... [2023-12-05 21:04:06,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3567485f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:04:06, skipping insertion in model container [2023-12-05 21:04:06,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:05" (2/3) ... [2023-12-05 21:04:06,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3567485f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:04:06, skipping insertion in model container [2023-12-05 21:04:06,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:04:06" (3/3) ... [2023-12-05 21:04:06,734 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-12-05 21:04:06,746 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:04:06,747 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 40 error locations. [2023-12-05 21:04:06,747 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:04:06,820 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:06,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 157 transitions, 318 flow [2023-12-05 21:04:06,891 INFO L124 PetriNetUnfolderBase]: 12/170 cut-off events. [2023-12-05 21:04:06,891 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:06,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 170 events. 12/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 329 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 134. Up to 4 conditions per place. [2023-12-05 21:04:06,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 157 transitions, 318 flow [2023-12-05 21:04:06,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 157 transitions, 318 flow [2023-12-05 21:04:06,913 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:06,920 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;@5ed6f2fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:06,920 INFO L363 AbstractCegarLoop]: Starting to check reachability of 79 error locations. [2023-12-05 21:04:06,928 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:06,928 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-12-05 21:04:06,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:06,928 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:06,929 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:06,929 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:06,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:06,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2139027774, now seen corresponding path program 1 times [2023-12-05 21:04:06,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:06,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801800224] [2023-12-05 21:04:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:06,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:07,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:07,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801800224] [2023-12-05 21:04:07,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801800224] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:07,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:07,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:07,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417102139] [2023-12-05 21:04:07,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:07,166 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:07,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:07,193 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 157 [2023-12-05 21:04:07,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 157 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:07,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 157 [2023-12-05 21:04:07,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:07,428 INFO L124 PetriNetUnfolderBase]: 171/713 cut-off events. [2023-12-05 21:04:07,428 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:07,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 713 events. 171/713 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3747 event pairs, 82 based on Foata normal form. 68/513 useless extension candidates. Maximal degree in co-relation 1039. Up to 186 conditions per place. [2023-12-05 21:04:07,433 INFO L140 encePairwiseOnDemand]: 134/157 looper letters, 74 selfloop transitions, 4 changer transitions 0/161 dead transitions. [2023-12-05 21:04:07,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 161 transitions, 482 flow [2023-12-05 21:04:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-12-05 21:04:07,442 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7898089171974523 [2023-12-05 21:04:07,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-12-05 21:04:07,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-12-05 21:04:07,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:07,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-12-05 21:04:07,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,455 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -19 predicate places. [2023-12-05 21:04:07,456 INFO L500 AbstractCegarLoop]: Abstraction has has 130 places, 161 transitions, 482 flow [2023-12-05 21:04:07,456 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,456 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:07,456 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 21:04:07,456 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:04:07,456 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:07,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:07,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2139027773, now seen corresponding path program 1 times [2023-12-05 21:04:07,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:07,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803725550] [2023-12-05 21:04:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:07,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:07,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:07,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803725550] [2023-12-05 21:04:07,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803725550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:07,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:07,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:07,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122135623] [2023-12-05 21:04:07,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:07,567 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:07,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:07,569 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 157 [2023-12-05 21:04:07,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 161 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:07,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 157 [2023-12-05 21:04:07,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:07,693 INFO L124 PetriNetUnfolderBase]: 110/501 cut-off events. [2023-12-05 21:04:07,694 INFO L125 PetriNetUnfolderBase]: For 55/77 co-relation queries the response was YES. [2023-12-05 21:04:07,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 501 events. 110/501 cut-off events. For 55/77 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2133 event pairs, 56 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 945. Up to 235 conditions per place. [2023-12-05 21:04:07,700 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 69 selfloop transitions, 1 changer transitions 0/159 dead transitions. [2023-12-05 21:04:07,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 159 transitions, 614 flow [2023-12-05 21:04:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-12-05 21:04:07,705 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6751592356687898 [2023-12-05 21:04:07,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-12-05 21:04:07,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-12-05 21:04:07,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:07,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-12-05 21:04:07,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,709 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -18 predicate places. [2023-12-05 21:04:07,710 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 614 flow [2023-12-05 21:04:07,710 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,710 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:07,710 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:07,710 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:04:07,710 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:07,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 654146078, now seen corresponding path program 1 times [2023-12-05 21:04:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:07,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771643220] [2023-12-05 21:04:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:07,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:07,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:07,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771643220] [2023-12-05 21:04:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771643220] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:07,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:07,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:07,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495536091] [2023-12-05 21:04:07,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:07,929 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:07,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:07,934 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 157 [2023-12-05 21:04:07,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 614 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:07,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:07,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 157 [2023-12-05 21:04:07,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:08,143 INFO L124 PetriNetUnfolderBase]: 112/552 cut-off events. [2023-12-05 21:04:08,144 INFO L125 PetriNetUnfolderBase]: For 191/245 co-relation queries the response was YES. [2023-12-05 21:04:08,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363 conditions, 552 events. 112/552 cut-off events. For 191/245 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2696 event pairs, 54 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 1293. Up to 252 conditions per place. [2023-12-05 21:04:08,151 INFO L140 encePairwiseOnDemand]: 151/157 looper letters, 97 selfloop transitions, 4 changer transitions 0/182 dead transitions. [2023-12-05 21:04:08,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 948 flow [2023-12-05 21:04:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:04:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:04:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-12-05 21:04:08,153 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.660828025477707 [2023-12-05 21:04:08,153 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-12-05 21:04:08,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-12-05 21:04:08,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:08,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-12-05 21:04:08,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,156 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,157 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -17 predicate places. [2023-12-05 21:04:08,157 INFO L500 AbstractCegarLoop]: Abstraction has has 132 places, 182 transitions, 948 flow [2023-12-05 21:04:08,157 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,158 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:08,158 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 21:04:08,158 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:04:08,158 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:08,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash 654146079, now seen corresponding path program 1 times [2023-12-05 21:04:08,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:08,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854726990] [2023-12-05 21:04:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:08,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:08,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854726990] [2023-12-05 21:04:08,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854726990] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:08,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:08,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:08,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851100679] [2023-12-05 21:04:08,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:08,381 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:08,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:08,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:08,383 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 157 [2023-12-05 21:04:08,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 182 transitions, 948 flow. Second operand has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:08,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 157 [2023-12-05 21:04:08,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:08,549 INFO L124 PetriNetUnfolderBase]: 110/546 cut-off events. [2023-12-05 21:04:08,549 INFO L125 PetriNetUnfolderBase]: For 385/461 co-relation queries the response was YES. [2023-12-05 21:04:08,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 546 events. 110/546 cut-off events. For 385/461 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2664 event pairs, 52 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1533. Up to 246 conditions per place. [2023-12-05 21:04:08,552 INFO L140 encePairwiseOnDemand]: 150/157 looper letters, 97 selfloop transitions, 5 changer transitions 0/181 dead transitions. [2023-12-05 21:04:08,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 181 transitions, 1140 flow [2023-12-05 21:04:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:04:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:04:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 574 transitions. [2023-12-05 21:04:08,554 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6093418259023354 [2023-12-05 21:04:08,554 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 574 transitions. [2023-12-05 21:04:08,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 574 transitions. [2023-12-05 21:04:08,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:08,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 574 transitions. [2023-12-05 21:04:08,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,558 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,558 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -14 predicate places. [2023-12-05 21:04:08,558 INFO L500 AbstractCegarLoop]: Abstraction has has 135 places, 181 transitions, 1140 flow [2023-12-05 21:04:08,559 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,559 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:08,559 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 21:04:08,559 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:04:08,559 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:08,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1400017933, now seen corresponding path program 1 times [2023-12-05 21:04:08,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:08,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338330398] [2023-12-05 21:04:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:08,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:08,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338330398] [2023-12-05 21:04:08,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338330398] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:08,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:08,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:08,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254036904] [2023-12-05 21:04:08,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:08,660 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:08,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:08,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:08,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:08,662 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 157 [2023-12-05 21:04:08,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 181 transitions, 1140 flow. Second operand has 6 states, 6 states have (on average 86.33333333333333) internal successors, (518), 6 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:08,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 157 [2023-12-05 21:04:08,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:08,854 INFO L124 PetriNetUnfolderBase]: 107/552 cut-off events. [2023-12-05 21:04:08,854 INFO L125 PetriNetUnfolderBase]: For 689/761 co-relation queries the response was YES. [2023-12-05 21:04:08,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1870 conditions, 552 events. 107/552 cut-off events. For 689/761 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2663 event pairs, 38 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1777. Up to 243 conditions per place. [2023-12-05 21:04:08,858 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 93 selfloop transitions, 8 changer transitions 0/182 dead transitions. [2023-12-05 21:04:08,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 182 transitions, 1354 flow [2023-12-05 21:04:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:04:08,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:04:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 497 transitions. [2023-12-05 21:04:08,860 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6331210191082802 [2023-12-05 21:04:08,860 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 497 transitions. [2023-12-05 21:04:08,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 497 transitions. [2023-12-05 21:04:08,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:08,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 497 transitions. [2023-12-05 21:04:08,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.4) internal successors, (497), 5 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,864 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,866 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -12 predicate places. [2023-12-05 21:04:08,866 INFO L500 AbstractCegarLoop]: Abstraction has has 137 places, 182 transitions, 1354 flow [2023-12-05 21:04:08,867 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.33333333333333) internal successors, (518), 6 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:08,867 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:08,867 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 21:04:08,867 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:04:08,867 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:08,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1400017934, now seen corresponding path program 1 times [2023-12-05 21:04:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:08,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49986712] [2023-12-05 21:04:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:09,001 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 21:04:09,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:09,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49986712] [2023-12-05 21:04:09,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49986712] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:09,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:09,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:04:09,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276090048] [2023-12-05 21:04:09,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:09,002 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:04:09,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:09,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:04:09,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:04:09,003 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 157 [2023-12-05 21:04:09,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 182 transitions, 1354 flow. Second operand has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:09,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:09,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 157 [2023-12-05 21:04:09,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:09,119 INFO L124 PetriNetUnfolderBase]: 95/513 cut-off events. [2023-12-05 21:04:09,120 INFO L125 PetriNetUnfolderBase]: For 1044/1180 co-relation queries the response was YES. [2023-12-05 21:04:09,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1902 conditions, 513 events. 95/513 cut-off events. For 1044/1180 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2361 event pairs, 33 based on Foata normal form. 2/379 useless extension candidates. Maximal degree in co-relation 1795. Up to 209 conditions per place. [2023-12-05 21:04:09,123 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 87 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2023-12-05 21:04:09,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 171 transitions, 1408 flow [2023-12-05 21:04:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:04:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:04:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 499 transitions. [2023-12-05 21:04:09,125 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6356687898089172 [2023-12-05 21:04:09,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 499 transitions. [2023-12-05 21:04:09,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 499 transitions. [2023-12-05 21:04:09,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:09,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 499 transitions. [2023-12-05 21:04:09,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 21:04:09,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:09,128 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:09,130 INFO L308 CegarLoopForPetriNet]: 149 programPoint places, -12 predicate places. [2023-12-05 21:04:09,130 INFO L500 AbstractCegarLoop]: Abstraction has has 137 places, 171 transitions, 1408 flow [2023-12-05 21:04:09,131 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:09,131 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:09,131 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:09,131 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:04:09,131 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:04:09,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash 405708083, now seen corresponding path program 1 times [2023-12-05 21:04:09,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:09,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915038461] [2023-12-05 21:04:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:09,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:09,143 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:09,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:09,162 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:09,162 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (78 of 79 remaining) [2023-12-05 21:04:09,164 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 79 remaining) [2023-12-05 21:04:09,164 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 79 remaining) [2023-12-05 21:04:09,164 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 79 remaining) [2023-12-05 21:04:09,164 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 79 remaining) [2023-12-05 21:04:09,164 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 79 remaining) [2023-12-05 21:04:09,164 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 79 remaining) [2023-12-05 21:04:09,164 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 79 remaining) [2023-12-05 21:04:09,164 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 79 remaining) [2023-12-05 21:04:09,165 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 79 remaining) [2023-12-05 21:04:09,166 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 79 remaining) [2023-12-05 21:04:09,167 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 79 remaining) [2023-12-05 21:04:09,168 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 79 remaining) [2023-12-05 21:04:09,169 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (15 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (12 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 79 remaining) [2023-12-05 21:04:09,170 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 79 remaining) [2023-12-05 21:04:09,171 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 79 remaining) [2023-12-05 21:04:09,171 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 79 remaining) [2023-12-05 21:04:09,171 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 79 remaining) [2023-12-05 21:04:09,171 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:04:09,171 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:09,173 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:09,173 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:04:09,280 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:09,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 277 transitions, 564 flow [2023-12-05 21:04:09,315 INFO L124 PetriNetUnfolderBase]: 23/305 cut-off events. [2023-12-05 21:04:09,315 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:04:09,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 305 events. 23/305 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 901 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-12-05 21:04:09,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 277 transitions, 564 flow [2023-12-05 21:04:09,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 277 transitions, 564 flow [2023-12-05 21:04:09,325 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:09,326 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;@5ed6f2fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:09,326 INFO L363 AbstractCegarLoop]: Starting to check reachability of 117 error locations. [2023-12-05 21:04:09,330 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:09,330 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-12-05 21:04:09,330 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:09,330 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:09,330 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 21:04:09,330 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:09,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:09,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1440196695, now seen corresponding path program 1 times [2023-12-05 21:04:09,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:09,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497780488] [2023-12-05 21:04:09,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:09,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:09,357 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 21:04:09,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:09,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497780488] [2023-12-05 21:04:09,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497780488] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:09,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:09,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:09,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830245987] [2023-12-05 21:04:09,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:09,358 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:09,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:09,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:09,360 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 277 [2023-12-05 21:04:09,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 277 transitions, 564 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:09,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:09,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 277 [2023-12-05 21:04:09,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:13,438 INFO L124 PetriNetUnfolderBase]: 16804/40963 cut-off events. [2023-12-05 21:04:13,438 INFO L125 PetriNetUnfolderBase]: For 295/295 co-relation queries the response was YES. [2023-12-05 21:04:13,527 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 21:04:13,737 INFO L140 encePairwiseOnDemand]: 236/277 looper letters, 154 selfloop transitions, 6 changer transitions 0/307 dead transitions. [2023-12-05 21:04:13,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 307 transitions, 949 flow [2023-12-05 21:04:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2023-12-05 21:04:13,739 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8279181708784596 [2023-12-05 21:04:13,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2023-12-05 21:04:13,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2023-12-05 21:04:13,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:13,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2023-12-05 21:04:13,741 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 21:04:13,742 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 21:04:13,742 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 21:04:13,742 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -34 predicate places. [2023-12-05 21:04:13,743 INFO L500 AbstractCegarLoop]: Abstraction has has 227 places, 307 transitions, 949 flow [2023-12-05 21:04:13,743 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 21:04:13,743 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:13,743 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 21:04:13,743 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:04:13,743 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 21:04:13,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1440196696, now seen corresponding path program 1 times [2023-12-05 21:04:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:13,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035908516] [2023-12-05 21:04:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:13,771 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 21:04:13,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:13,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035908516] [2023-12-05 21:04:13,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035908516] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:13,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:13,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:13,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670730856] [2023-12-05 21:04:13,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:13,772 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:13,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:13,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:13,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:13,773 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 277 [2023-12-05 21:04:13,774 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 21:04:13,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:13,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 277 [2023-12-05 21:04:13,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:16,537 INFO L124 PetriNetUnfolderBase]: 12632/30406 cut-off events. [2023-12-05 21:04:16,537 INFO L125 PetriNetUnfolderBase]: For 3250/5178 co-relation queries the response was YES. [2023-12-05 21:04:16,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66119 conditions, 30406 events. 12632/30406 cut-off events. For 3250/5178 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 322652 event pairs, 5090 based on Foata normal form. 0/18979 useless extension candidates. Maximal degree in co-relation 30015. Up to 17268 conditions per place. [2023-12-05 21:04:16,751 INFO L140 encePairwiseOnDemand]: 275/277 looper letters, 144 selfloop transitions, 1 changer transitions 0/305 dead transitions. [2023-12-05 21:04:16,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 305 transitions, 1231 flow [2023-12-05 21:04:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-12-05 21:04:16,753 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6738868832731648 [2023-12-05 21:04:16,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-12-05 21:04:16,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-12-05 21:04:16,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:16,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-12-05 21:04:16,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,756 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -33 predicate places. [2023-12-05 21:04:16,756 INFO L500 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 1231 flow [2023-12-05 21:04:16,756 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,756 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:16,757 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:16,757 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:04:16,757 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:16,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:16,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1822362506, now seen corresponding path program 1 times [2023-12-05 21:04:16,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:16,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221791855] [2023-12-05 21:04:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:16,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:16,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:16,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221791855] [2023-12-05 21:04:16,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221791855] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:16,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:16,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454702946] [2023-12-05 21:04:16,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:16,865 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:16,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:16,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:16,866 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 277 [2023-12-05 21:04:16,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 305 transitions, 1231 flow. Second operand has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:16,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:16,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 277 [2023-12-05 21:04:16,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:21,793 INFO L124 PetriNetUnfolderBase]: 18682/46987 cut-off events. [2023-12-05 21:04:21,794 INFO L125 PetriNetUnfolderBase]: For 13396/19968 co-relation queries the response was YES. [2023-12-05 21:04:21,905 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 21:04:22,184 INFO L140 encePairwiseOnDemand]: 258/277 looper letters, 271 selfloop transitions, 19 changer transitions 0/431 dead transitions. [2023-12-05 21:04:22,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 431 transitions, 2532 flow [2023-12-05 21:04:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:04:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:04:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1051 transitions. [2023-12-05 21:04:22,187 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6323706377858003 [2023-12-05 21:04:22,187 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1051 transitions. [2023-12-05 21:04:22,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1051 transitions. [2023-12-05 21:04:22,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:22,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1051 transitions. [2023-12-05 21:04:22,190 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 21:04:22,192 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 21:04:22,192 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 21:04:22,193 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -32 predicate places. [2023-12-05 21:04:22,193 INFO L500 AbstractCegarLoop]: Abstraction has has 229 places, 431 transitions, 2532 flow [2023-12-05 21:04:22,193 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 21:04:22,194 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:22,194 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 21:04:22,194 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:04:22,194 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:22,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:22,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1613601181, now seen corresponding path program 1 times [2023-12-05 21:04:22,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:22,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521759471] [2023-12-05 21:04:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:22,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:22,282 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 21:04:22,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:22,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521759471] [2023-12-05 21:04:22,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521759471] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:22,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:22,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:04:22,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855344169] [2023-12-05 21:04:22,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:22,284 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:04:22,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:04:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:04:22,286 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 277 [2023-12-05 21:04:22,286 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 21:04:22,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:22,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 277 [2023-12-05 21:04:22,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:27,092 INFO L124 PetriNetUnfolderBase]: 16294/42323 cut-off events. [2023-12-05 21:04:27,092 INFO L125 PetriNetUnfolderBase]: For 26200/39538 co-relation queries the response was YES. [2023-12-05 21:04:27,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137015 conditions, 42323 events. 16294/42323 cut-off events. For 26200/39538 co-relation queries the response was YES. Maximal size of possible extension queue 1307. Compared 502357 event pairs, 3820 based on Foata normal form. 688/29146 useless extension candidates. Maximal degree in co-relation 80029. Up to 21744 conditions per place. [2023-12-05 21:04:27,558 INFO L140 encePairwiseOnDemand]: 257/277 looper letters, 304 selfloop transitions, 6 changer transitions 0/452 dead transitions. [2023-12-05 21:04:27,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 452 transitions, 3312 flow [2023-12-05 21:04:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:04:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:04:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 899 transitions. [2023-12-05 21:04:27,560 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6490974729241877 [2023-12-05 21:04:27,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 899 transitions. [2023-12-05 21:04:27,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 899 transitions. [2023-12-05 21:04:27,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:27,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 899 transitions. [2023-12-05 21:04:27,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.8) internal successors, (899), 5 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,564 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,564 INFO L308 CegarLoopForPetriNet]: 261 programPoint places, -36 predicate places. [2023-12-05 21:04:27,565 INFO L500 AbstractCegarLoop]: Abstraction has has 225 places, 452 transitions, 3312 flow [2023-12-05 21:04:27,565 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.6) internal successors, (763), 5 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,565 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:27,565 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:27,565 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:04:27,565 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-12-05 21:04:27,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:27,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1523270030, now seen corresponding path program 1 times [2023-12-05 21:04:27,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:27,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689613458] [2023-12-05 21:04:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:27,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:27,574 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:27,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:27,582 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:27,582 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (116 of 117 remaining) [2023-12-05 21:04:27,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 117 remaining) [2023-12-05 21:04:27,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 117 remaining) [2023-12-05 21:04:27,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 117 remaining) [2023-12-05 21:04:27,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 117 remaining) [2023-12-05 21:04:27,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 117 remaining) [2023-12-05 21:04:27,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (93 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (90 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 117 remaining) [2023-12-05 21:04:27,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 117 remaining) [2023-12-05 21:04:27,585 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 117 remaining) [2023-12-05 21:04:27,586 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (53 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (50 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 117 remaining) [2023-12-05 21:04:27,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 117 remaining) [2023-12-05 21:04:27,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (15 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (12 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 117 remaining) [2023-12-05 21:04:27,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 117 remaining) [2023-12-05 21:04:27,590 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 117 remaining) [2023-12-05 21:04:27,590 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 117 remaining) [2023-12-05 21:04:27,590 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 117 remaining) [2023-12-05 21:04:27,590 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 117 remaining) [2023-12-05 21:04:27,590 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 117 remaining) [2023-12-05 21:04:27,590 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 117 remaining) [2023-12-05 21:04:27,590 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:04:27,590 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:04:27,591 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:27,591 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:04:27,689 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:27,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 397 transitions, 812 flow [2023-12-05 21:04:27,743 INFO L124 PetriNetUnfolderBase]: 34/440 cut-off events. [2023-12-05 21:04:27,744 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:04:27,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 440 events. 34/440 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1652 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 372. Up to 8 conditions per place. [2023-12-05 21:04:27,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 373 places, 397 transitions, 812 flow [2023-12-05 21:04:27,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 397 transitions, 812 flow [2023-12-05 21:04:27,761 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:27,761 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5ed6f2fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:27,761 INFO L363 AbstractCegarLoop]: Starting to check reachability of 155 error locations. [2023-12-05 21:04:27,762 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:27,762 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-12-05 21:04:27,762 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:27,763 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:27,763 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:27,763 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 152 more)] === [2023-12-05 21:04:27,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:27,763 INFO L85 PathProgramCache]: Analyzing trace with hash 848533092, now seen corresponding path program 1 times [2023-12-05 21:04:27,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:27,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036275479] [2023-12-05 21:04:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:27,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:27,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:27,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036275479] [2023-12-05 21:04:27,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036275479] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:27,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:27,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:27,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555355262] [2023-12-05 21:04:27,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:27,782 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:27,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:27,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:27,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:27,783 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 397 [2023-12-05 21:04:27,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 397 transitions, 812 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:27,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:27,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 397 [2023-12-05 21:04:27,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand