/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/14_spin2003.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:02:25,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:02:25,426 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 21:02:25,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:02:25,443 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:02:25,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:02:25,444 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:02:25,444 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:02:25,444 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:02:25,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:02:25,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:02:25,448 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:02:25,448 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:02:25,449 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:02:25,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:02:25,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:02:25,449 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:02:25,449 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:02:25,450 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:02:25,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:02:25,450 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:02:25,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:02:25,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:02:25,451 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:02:25,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:02:25,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:02:25,452 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:02:25,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:02:25,452 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:02:25,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:02:25,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:02:25,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:02:25,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:02:25,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:02:25,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:02:25,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:02:25,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:02:25,679 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:02:25,680 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:02:25,681 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-12-05 21:02:26,761 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:02:26,971 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:02:26,971 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-12-05 21:02:26,994 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3d2c088/2fe56d3fe5174f04bb300c3bba7a55d0/FLAG4ac53bf66 [2023-12-05 21:02:27,005 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3d2c088/2fe56d3fe5174f04bb300c3bba7a55d0 [2023-12-05 21:02:27,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:02:27,008 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:02:27,009 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:02:27,009 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:02:27,012 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:02:27,013 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254ab1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27, skipping insertion in model container [2023-12-05 21:02:27,013 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,047 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:02:27,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:02:27,303 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:02:27,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:02:27,370 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:02:27,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27 WrapperNode [2023-12-05 21:02:27,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:02:27,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:02:27,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:02:27,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:02:27,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,390 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,403 INFO L138 Inliner]: procedures = 169, calls = 15, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 49 [2023-12-05 21:02:27,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:02:27,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:02:27,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:02:27,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:02:27,409 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,410 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,411 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,411 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,418 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,419 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:02:27,421 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:02:27,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:02:27,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:02:27,422 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (1/1) ... [2023-12-05 21:02:27,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:02:27,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:02:27,449 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 21:02:27,454 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 21:02:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:02:27,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:02:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:02:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:02:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:02:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:02:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:02:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:02:27,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:02:27,469 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 21:02:27,575 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:02:27,577 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:02:27,692 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:02:27,723 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:02:27,723 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-05 21:02:27,724 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:02:27 BoogieIcfgContainer [2023-12-05 21:02:27,724 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:02:27,726 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:02:27,726 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:02:27,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:02:27,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:02:27" (1/3) ... [2023-12-05 21:02:27,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cbdc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:02:27, skipping insertion in model container [2023-12-05 21:02:27,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:27" (2/3) ... [2023-12-05 21:02:27,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cbdc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:02:27, skipping insertion in model container [2023-12-05 21:02:27,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:02:27" (3/3) ... [2023-12-05 21:02:27,731 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-12-05 21:02:27,749 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:02:27,750 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-05 21:02:27,750 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:02:27,790 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:27,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 44 transitions, 92 flow [2023-12-05 21:02:27,844 INFO L124 PetriNetUnfolderBase]: 4/57 cut-off events. [2023-12-05 21:02:27,845 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:27,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 57 events. 4/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 108 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 31. Up to 4 conditions per place. [2023-12-05 21:02:27,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 44 transitions, 92 flow [2023-12-05 21:02:27,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 44 transitions, 92 flow [2023-12-05 21:02:27,857 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:27,862 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;@786b0ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:27,862 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:02:27,866 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:27,867 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:02:27,867 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:27,867 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:27,867 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:27,868 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:27,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1327470996, now seen corresponding path program 1 times [2023-12-05 21:02:27,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:27,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878335586] [2023-12-05 21:02:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:27,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:28,125 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 21:02:28,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:28,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878335586] [2023-12-05 21:02:28,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878335586] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:28,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:28,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:28,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918233018] [2023-12-05 21:02:28,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:28,137 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:28,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:28,162 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 44 [2023-12-05 21:02:28,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 21:02:28,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:28,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 44 [2023-12-05 21:02:28,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:28,199 INFO L124 PetriNetUnfolderBase]: 4/60 cut-off events. [2023-12-05 21:02:28,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:28,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 60 events. 4/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 4 based on Foata normal form. 10/62 useless extension candidates. Maximal degree in co-relation 54. Up to 16 conditions per place. [2023-12-05 21:02:28,200 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 9 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-12-05 21:02:28,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 86 flow [2023-12-05 21:02:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:28,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-12-05 21:02:28,213 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2023-12-05 21:02:28,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-12-05 21:02:28,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-12-05 21:02:28,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:28,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-12-05 21:02:28,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 21:02:28,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 21:02:28,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 21:02:28,236 INFO L308 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2023-12-05 21:02:28,237 INFO L500 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 86 flow [2023-12-05 21:02:28,237 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 21:02:28,237 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:28,237 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:28,237 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:02:28,238 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:28,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1327470997, now seen corresponding path program 1 times [2023-12-05 21:02:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:28,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606156478] [2023-12-05 21:02:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:28,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:28,330 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 21:02:28,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:28,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606156478] [2023-12-05 21:02:28,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606156478] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:28,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:28,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259490533] [2023-12-05 21:02:28,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:28,333 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:28,335 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 44 [2023-12-05 21:02:28,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 21:02:28,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:28,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 44 [2023-12-05 21:02:28,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:28,372 INFO L124 PetriNetUnfolderBase]: 2/46 cut-off events. [2023-12-05 21:02:28,372 INFO L125 PetriNetUnfolderBase]: For 9/11 co-relation queries the response was YES. [2023-12-05 21:02:28,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 46 events. 2/46 cut-off events. For 9/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 2 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 43. Up to 10 conditions per place. [2023-12-05 21:02:28,373 INFO L140 encePairwiseOnDemand]: 42/44 looper letters, 7 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-12-05 21:02:28,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 98 flow [2023-12-05 21:02:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-12-05 21:02:28,376 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2023-12-05 21:02:28,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-12-05 21:02:28,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-12-05 21:02:28,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:28,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-12-05 21:02:28,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 21:02:28,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 21:02:28,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 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 21:02:28,380 INFO L308 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-12-05 21:02:28,381 INFO L500 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 98 flow [2023-12-05 21:02:28,381 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 21:02:28,381 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:28,381 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:28,381 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:02:28,381 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:28,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1818083679, now seen corresponding path program 1 times [2023-12-05 21:02:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:28,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637862597] [2023-12-05 21:02:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:28,412 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:02:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:28,438 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:02:28,438 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:02:28,439 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:02:28,441 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:02:28,441 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:02:28,441 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:02:28,442 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:02:28,445 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:02:28,445 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:02:28,464 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:28,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 61 transitions, 132 flow [2023-12-05 21:02:28,496 INFO L124 PetriNetUnfolderBase]: 7/89 cut-off events. [2023-12-05 21:02:28,497 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:02:28,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 89 events. 7/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 198 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 58. Up to 6 conditions per place. [2023-12-05 21:02:28,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 61 transitions, 132 flow [2023-12-05 21:02:28,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 61 transitions, 132 flow [2023-12-05 21:02:28,505 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:28,505 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;@786b0ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:28,505 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:02:28,507 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:28,508 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:02:28,508 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:28,508 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:28,508 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:28,508 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:28,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash 3053681, now seen corresponding path program 1 times [2023-12-05 21:02:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:28,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666628377] [2023-12-05 21:02:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:28,572 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 21:02:28,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:28,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666628377] [2023-12-05 21:02:28,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666628377] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:28,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:28,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:28,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125388159] [2023-12-05 21:02:28,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:28,574 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:28,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:28,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:28,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:28,575 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 61 [2023-12-05 21:02:28,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 21:02:28,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:28,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 61 [2023-12-05 21:02:28,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:28,623 INFO L124 PetriNetUnfolderBase]: 34/209 cut-off events. [2023-12-05 21:02:28,623 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-12-05 21:02:28,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 209 events. 34/209 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 999 event pairs, 34 based on Foata normal form. 51/230 useless extension candidates. Maximal degree in co-relation 81. Up to 73 conditions per place. [2023-12-05 21:02:28,626 INFO L140 encePairwiseOnDemand]: 53/61 looper letters, 12 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-12-05 21:02:28,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 122 flow [2023-12-05 21:02:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-12-05 21:02:28,629 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6994535519125683 [2023-12-05 21:02:28,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-12-05 21:02:28,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-12-05 21:02:28,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:28,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-12-05 21:02:28,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 21:02:28,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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 21:02:28,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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 21:02:28,632 INFO L308 CegarLoopForPetriNet]: 61 programPoint places, -11 predicate places. [2023-12-05 21:02:28,632 INFO L500 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 122 flow [2023-12-05 21:02:28,633 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 21:02:28,633 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:28,633 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:28,633 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:02:28,633 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:28,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash 3053682, now seen corresponding path program 1 times [2023-12-05 21:02:28,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:28,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160003991] [2023-12-05 21:02:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:28,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:28,686 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 21:02:28,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:28,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160003991] [2023-12-05 21:02:28,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160003991] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:28,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:28,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:28,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843372941] [2023-12-05 21:02:28,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:28,688 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:28,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:28,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:28,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:28,689 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 61 [2023-12-05 21:02:28,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 21:02:28,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:28,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 61 [2023-12-05 21:02:28,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:28,721 INFO L124 PetriNetUnfolderBase]: 20/150 cut-off events. [2023-12-05 21:02:28,722 INFO L125 PetriNetUnfolderBase]: For 35/45 co-relation queries the response was YES. [2023-12-05 21:02:28,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 150 events. 20/150 cut-off events. For 35/45 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 580 event pairs, 20 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 74. Up to 46 conditions per place. [2023-12-05 21:02:28,725 INFO L140 encePairwiseOnDemand]: 59/61 looper letters, 10 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-12-05 21:02:28,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 140 flow [2023-12-05 21:02:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2023-12-05 21:02:28,727 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6721311475409836 [2023-12-05 21:02:28,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 123 transitions. [2023-12-05 21:02:28,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 123 transitions. [2023-12-05 21:02:28,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:28,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 123 transitions. [2023-12-05 21:02:28,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 21:02:28,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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 21:02:28,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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 21:02:28,732 INFO L308 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-12-05 21:02:28,733 INFO L500 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 140 flow [2023-12-05 21:02:28,733 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 21:02:28,733 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:28,733 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] [2023-12-05 21:02:28,733 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:02:28,733 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:28,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:28,734 INFO L85 PathProgramCache]: Analyzing trace with hash -391177916, now seen corresponding path program 1 times [2023-12-05 21:02:28,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:28,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266491987] [2023-12-05 21:02:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:28,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:28,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:02:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:28,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:02:28,762 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:02:28,762 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:02:28,762 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:02:28,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:02:28,763 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:02:28,763 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:02:28,763 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:02:28,763 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:02:28,780 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:28,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 78 transitions, 174 flow [2023-12-05 21:02:28,791 INFO L124 PetriNetUnfolderBase]: 10/121 cut-off events. [2023-12-05 21:02:28,792 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:02:28,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 121 events. 10/121 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 297 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 93. Up to 8 conditions per place. [2023-12-05 21:02:28,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 78 transitions, 174 flow [2023-12-05 21:02:28,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 78 transitions, 174 flow [2023-12-05 21:02:28,797 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:28,799 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;@786b0ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:28,799 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:02:28,801 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:28,801 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:02:28,801 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:28,805 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:28,805 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:28,805 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:28,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:28,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2111638655, now seen corresponding path program 1 times [2023-12-05 21:02:28,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:28,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722476070] [2023-12-05 21:02:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:28,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:28,839 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 21:02:28,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722476070] [2023-12-05 21:02:28,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722476070] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:28,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:28,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:28,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675105748] [2023-12-05 21:02:28,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:28,841 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:28,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:28,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:28,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:28,843 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 78 [2023-12-05 21:02:28,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 21:02:28,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:28,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 78 [2023-12-05 21:02:28,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:28,952 INFO L124 PetriNetUnfolderBase]: 178/710 cut-off events. [2023-12-05 21:02:28,953 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-12-05 21:02:28,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 710 events. 178/710 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4915 event pairs, 178 based on Foata normal form. 227/841 useless extension candidates. Maximal degree in co-relation 294. Up to 298 conditions per place. [2023-12-05 21:02:28,957 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 15 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-12-05 21:02:28,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 160 flow [2023-12-05 21:02:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 166 transitions. [2023-12-05 21:02:28,959 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7094017094017094 [2023-12-05 21:02:28,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 166 transitions. [2023-12-05 21:02:28,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 166 transitions. [2023-12-05 21:02:28,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:28,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 166 transitions. [2023-12-05 21:02:28,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 21:02:28,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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 21:02:28,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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 21:02:28,963 INFO L308 CegarLoopForPetriNet]: 78 programPoint places, -14 predicate places. [2023-12-05 21:02:28,963 INFO L500 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 160 flow [2023-12-05 21:02:28,964 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 21:02:28,964 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:28,964 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:28,964 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:02:28,964 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:28,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2111638656, now seen corresponding path program 1 times [2023-12-05 21:02:28,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:28,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6336860] [2023-12-05 21:02:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:28,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:29,027 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 21:02:29,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6336860] [2023-12-05 21:02:29,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6336860] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:29,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:29,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640565118] [2023-12-05 21:02:29,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:29,028 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:29,029 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 78 [2023-12-05 21:02:29,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 21:02:29,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:29,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 78 [2023-12-05 21:02:29,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:29,089 INFO L124 PetriNetUnfolderBase]: 110/498 cut-off events. [2023-12-05 21:02:29,089 INFO L125 PetriNetUnfolderBase]: For 152/186 co-relation queries the response was YES. [2023-12-05 21:02:29,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 498 events. 110/498 cut-off events. For 152/186 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3092 event pairs, 110 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 257. Up to 190 conditions per place. [2023-12-05 21:02:29,092 INFO L140 encePairwiseOnDemand]: 76/78 looper letters, 13 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-12-05 21:02:29,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 54 transitions, 184 flow [2023-12-05 21:02:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 159 transitions. [2023-12-05 21:02:29,093 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6794871794871795 [2023-12-05 21:02:29,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 159 transitions. [2023-12-05 21:02:29,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 159 transitions. [2023-12-05 21:02:29,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:29,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 159 transitions. [2023-12-05 21:02:29,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 21:02:29,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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 21:02:29,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 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 21:02:29,096 INFO L308 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2023-12-05 21:02:29,096 INFO L500 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 184 flow [2023-12-05 21:02:29,096 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 21:02:29,096 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:29,097 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:29,097 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:02:29,097 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:29,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2108830741, now seen corresponding path program 1 times [2023-12-05 21:02:29,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:29,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475619924] [2023-12-05 21:02:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:29,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:29,115 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:02:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:29,135 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:02:29,135 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:02:29,135 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:02:29,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:02:29,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:02:29,135 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:02:29,136 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:02:29,136 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:02:29,136 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-05 21:02:29,160 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:29,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 218 flow [2023-12-05 21:02:29,175 INFO L124 PetriNetUnfolderBase]: 13/153 cut-off events. [2023-12-05 21:02:29,175 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-12-05 21:02:29,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 153 events. 13/153 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 386 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 129. Up to 10 conditions per place. [2023-12-05 21:02:29,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 95 transitions, 218 flow [2023-12-05 21:02:29,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 95 transitions, 218 flow [2023-12-05 21:02:29,179 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:29,180 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;@786b0ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:29,180 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:02:29,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:29,181 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:02:29,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:29,182 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:29,182 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:29,182 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:29,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash -936708674, now seen corresponding path program 1 times [2023-12-05 21:02:29,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:29,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120251207] [2023-12-05 21:02:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:29,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:29,212 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 21:02:29,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:29,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120251207] [2023-12-05 21:02:29,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120251207] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:29,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:29,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:29,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833981237] [2023-12-05 21:02:29,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:29,213 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:29,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:29,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:29,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:29,215 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 95 [2023-12-05 21:02:29,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 21:02:29,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:29,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 95 [2023-12-05 21:02:29,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:29,447 INFO L124 PetriNetUnfolderBase]: 772/2375 cut-off events. [2023-12-05 21:02:29,447 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-12-05 21:02:29,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 2375 events. 772/2375 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20188 event pairs, 772 based on Foata normal form. 920/3001 useless extension candidates. Maximal degree in co-relation 1058. Up to 1135 conditions per place. [2023-12-05 21:02:29,462 INFO L140 encePairwiseOnDemand]: 83/95 looper letters, 18 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-12-05 21:02:29,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 67 transitions, 200 flow [2023-12-05 21:02:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2023-12-05 21:02:29,464 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7157894736842105 [2023-12-05 21:02:29,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 204 transitions. [2023-12-05 21:02:29,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 204 transitions. [2023-12-05 21:02:29,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:29,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 204 transitions. [2023-12-05 21:02:29,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 21:02:29,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 21:02:29,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 21:02:29,466 INFO L308 CegarLoopForPetriNet]: 95 programPoint places, -17 predicate places. [2023-12-05 21:02:29,466 INFO L500 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 200 flow [2023-12-05 21:02:29,466 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 21:02:29,466 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:29,466 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:29,466 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:02:29,466 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:29,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:29,467 INFO L85 PathProgramCache]: Analyzing trace with hash -936708673, now seen corresponding path program 1 times [2023-12-05 21:02:29,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:29,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135753940] [2023-12-05 21:02:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:29,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:29,499 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 21:02:29,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:29,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135753940] [2023-12-05 21:02:29,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135753940] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:29,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:29,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:29,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3918730] [2023-12-05 21:02:29,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:29,500 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:29,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:29,501 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 95 [2023-12-05 21:02:29,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 21:02:29,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:29,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 95 [2023-12-05 21:02:29,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:29,715 INFO L124 PetriNetUnfolderBase]: 488/1650 cut-off events. [2023-12-05 21:02:29,715 INFO L125 PetriNetUnfolderBase]: For 665/771 co-relation queries the response was YES. [2023-12-05 21:02:29,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3306 conditions, 1650 events. 488/1650 cut-off events. For 665/771 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13173 event pairs, 488 based on Foata normal form. 0/1517 useless extension candidates. Maximal degree in co-relation 927. Up to 730 conditions per place. [2023-12-05 21:02:29,725 INFO L140 encePairwiseOnDemand]: 93/95 looper letters, 16 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-12-05 21:02:29,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 230 flow [2023-12-05 21:02:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2023-12-05 21:02:29,727 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2023-12-05 21:02:29,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 195 transitions. [2023-12-05 21:02:29,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 195 transitions. [2023-12-05 21:02:29,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:29,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 195 transitions. [2023-12-05 21:02:29,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 21:02:29,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 21:02:29,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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 21:02:29,730 INFO L308 CegarLoopForPetriNet]: 95 programPoint places, -16 predicate places. [2023-12-05 21:02:29,731 INFO L500 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 230 flow [2023-12-05 21:02:29,731 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 21:02:29,731 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:29,731 INFO L233 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:29,731 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:02:29,731 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:29,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1375667229, now seen corresponding path program 1 times [2023-12-05 21:02:29,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:29,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640377242] [2023-12-05 21:02:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:29,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:29,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:02:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:29,765 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:02:29,765 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:02:29,765 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:02:29,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:02:29,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:02:29,766 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:02:29,766 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:02:29,766 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:02:29,766 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-12-05 21:02:29,786 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:29,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 112 transitions, 264 flow [2023-12-05 21:02:29,806 INFO L124 PetriNetUnfolderBase]: 16/185 cut-off events. [2023-12-05 21:02:29,807 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-12-05 21:02:29,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 185 events. 16/185 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 477 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 166. Up to 12 conditions per place. [2023-12-05 21:02:29,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 112 transitions, 264 flow [2023-12-05 21:02:29,810 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 112 transitions, 264 flow [2023-12-05 21:02:29,812 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:29,818 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;@786b0ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:29,818 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:02:29,819 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:29,819 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:02:29,819 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:29,819 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:29,820 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:29,820 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:29,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:29,820 INFO L85 PathProgramCache]: Analyzing trace with hash -552053714, now seen corresponding path program 1 times [2023-12-05 21:02:29,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:29,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877065314] [2023-12-05 21:02:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:29,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:29,845 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 21:02:29,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:29,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877065314] [2023-12-05 21:02:29,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877065314] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:29,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:29,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:29,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17356391] [2023-12-05 21:02:29,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:29,846 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:29,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:29,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:29,847 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 112 [2023-12-05 21:02:29,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 112 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 21:02:29,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:29,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 112 [2023-12-05 21:02:29,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:30,812 INFO L124 PetriNetUnfolderBase]: 3040/7856 cut-off events. [2023-12-05 21:02:30,813 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2023-12-05 21:02:30,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12667 conditions, 7856 events. 3040/7856 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 76716 event pairs, 3040 based on Foata normal form. 3485/10453 useless extension candidates. Maximal degree in co-relation 3722. Up to 4132 conditions per place. [2023-12-05 21:02:30,875 INFO L140 encePairwiseOnDemand]: 98/112 looper letters, 21 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-12-05 21:02:30,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 79 transitions, 242 flow [2023-12-05 21:02:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-12-05 21:02:30,922 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7202380952380952 [2023-12-05 21:02:30,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-12-05 21:02:30,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-12-05 21:02:30,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:30,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-12-05 21:02:30,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 21:02:30,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 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 21:02:30,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 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 21:02:30,924 INFO L308 CegarLoopForPetriNet]: 112 programPoint places, -20 predicate places. [2023-12-05 21:02:30,924 INFO L500 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 242 flow [2023-12-05 21:02:30,924 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 21:02:30,924 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:30,924 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:30,924 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-05 21:02:30,924 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:30,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash -552053713, now seen corresponding path program 1 times [2023-12-05 21:02:30,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:30,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573066967] [2023-12-05 21:02:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:30,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:30,957 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 21:02:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573066967] [2023-12-05 21:02:30,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573066967] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:30,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:30,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:30,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304345273] [2023-12-05 21:02:30,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:30,959 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:30,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:30,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:30,960 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 112 [2023-12-05 21:02:30,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 21:02:30,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:30,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 112 [2023-12-05 21:02:30,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:31,556 INFO L124 PetriNetUnfolderBase]: 1946/5430 cut-off events. [2023-12-05 21:02:31,556 INFO L125 PetriNetUnfolderBase]: For 2825/3147 co-relation queries the response was YES. [2023-12-05 21:02:31,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11461 conditions, 5430 events. 1946/5430 cut-off events. For 2825/3147 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 51083 event pairs, 1946 based on Foata normal form. 0/5027 useless extension candidates. Maximal degree in co-relation 3321. Up to 2674 conditions per place. [2023-12-05 21:02:31,595 INFO L140 encePairwiseOnDemand]: 110/112 looper letters, 19 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-12-05 21:02:31,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 78 transitions, 278 flow [2023-12-05 21:02:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-12-05 21:02:31,597 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6875 [2023-12-05 21:02:31,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-12-05 21:02:31,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-12-05 21:02:31,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:31,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-12-05 21:02:31,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 21:02:31,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 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 21:02:31,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 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 21:02:31,600 INFO L308 CegarLoopForPetriNet]: 112 programPoint places, -19 predicate places. [2023-12-05 21:02:31,600 INFO L500 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 278 flow [2023-12-05 21:02:31,600 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 21:02:31,600 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:31,600 INFO L233 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:31,600 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-05 21:02:31,600 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:31,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1850963385, now seen corresponding path program 1 times [2023-12-05 21:02:31,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:31,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72330909] [2023-12-05 21:02:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:31,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:31,614 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:02:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:31,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:02:31,636 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:02:31,636 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:02:31,636 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:02:31,636 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:02:31,636 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-05 21:02:31,636 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:02:31,637 WARN L227 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:02:31,637 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-12-05 21:02:31,659 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 129 transitions, 312 flow [2023-12-05 21:02:31,675 INFO L124 PetriNetUnfolderBase]: 19/217 cut-off events. [2023-12-05 21:02:31,675 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-12-05 21:02:31,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 217 events. 19/217 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 572 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 204. Up to 14 conditions per place. [2023-12-05 21:02:31,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 129 transitions, 312 flow [2023-12-05 21:02:31,678 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 129 transitions, 312 flow [2023-12-05 21:02:31,679 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:31,679 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;@786b0ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:31,679 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:02:31,680 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:31,680 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:02:31,680 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:31,680 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:31,680 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:31,680 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:31,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1029363761, now seen corresponding path program 1 times [2023-12-05 21:02:31,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:31,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809378193] [2023-12-05 21:02:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:31,703 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 21:02:31,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:31,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809378193] [2023-12-05 21:02:31,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809378193] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:31,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:31,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:31,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716677819] [2023-12-05 21:02:31,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:31,704 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:31,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:31,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:31,705 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 129 [2023-12-05 21:02:31,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 129 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 21:02:31,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:31,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 129 [2023-12-05 21:02:31,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:34,498 INFO L124 PetriNetUnfolderBase]: 11302/25757 cut-off events. [2023-12-05 21:02:34,498 INFO L125 PetriNetUnfolderBase]: For 9628/9628 co-relation queries the response was YES. [2023-12-05 21:02:34,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42719 conditions, 25757 events. 11302/25757 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 277744 event pairs, 11302 based on Foata normal form. 12638/35725 useless extension candidates. Maximal degree in co-relation 12767. Up to 14581 conditions per place. [2023-12-05 21:02:34,743 INFO L140 encePairwiseOnDemand]: 113/129 looper letters, 24 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2023-12-05 21:02:34,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 91 transitions, 286 flow [2023-12-05 21:02:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-12-05 21:02:34,745 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7235142118863049 [2023-12-05 21:02:34,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-12-05 21:02:34,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-12-05 21:02:34,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:34,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-12-05 21:02:34,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 21:02:34,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 21:02:34,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 21:02:34,747 INFO L308 CegarLoopForPetriNet]: 129 programPoint places, -23 predicate places. [2023-12-05 21:02:34,747 INFO L500 AbstractCegarLoop]: Abstraction has has 106 places, 91 transitions, 286 flow [2023-12-05 21:02:34,747 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 21:02:34,747 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:34,747 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:34,747 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-05 21:02:34,747 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:34,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1029363760, now seen corresponding path program 1 times [2023-12-05 21:02:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:34,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106114470] [2023-12-05 21:02:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:34,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:34,780 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 21:02:34,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:34,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106114470] [2023-12-05 21:02:34,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106114470] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:34,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:34,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:34,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960466693] [2023-12-05 21:02:34,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:34,781 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:34,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:34,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:34,782 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 129 [2023-12-05 21:02:34,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 91 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 21:02:34,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:34,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 129 [2023-12-05 21:02:34,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:36,694 INFO L124 PetriNetUnfolderBase]: 7292/17742 cut-off events. [2023-12-05 21:02:36,695 INFO L125 PetriNetUnfolderBase]: For 11573/12543 co-relation queries the response was YES. [2023-12-05 21:02:36,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39083 conditions, 17742 events. 7292/17742 cut-off events. For 11573/12543 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 188123 event pairs, 7292 based on Foata normal form. 0/16529 useless extension candidates. Maximal degree in co-relation 11556. Up to 9478 conditions per place. [2023-12-05 21:02:36,826 INFO L140 encePairwiseOnDemand]: 127/129 looper letters, 22 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-12-05 21:02:36,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 90 transitions, 328 flow [2023-12-05 21:02:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-12-05 21:02:36,827 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.689922480620155 [2023-12-05 21:02:36,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-12-05 21:02:36,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-12-05 21:02:36,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:36,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-12-05 21:02:36,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 21:02:36,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 21:02:36,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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 21:02:36,829 INFO L308 CegarLoopForPetriNet]: 129 programPoint places, -22 predicate places. [2023-12-05 21:02:36,829 INFO L500 AbstractCegarLoop]: Abstraction has has 107 places, 90 transitions, 328 flow [2023-12-05 21:02:36,829 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 21:02:36,829 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:36,829 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:36,829 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-05 21:02:36,829 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:36,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash -219033662, now seen corresponding path program 1 times [2023-12-05 21:02:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:36,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570274706] [2023-12-05 21:02:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:36,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:36,844 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:02:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:36,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:02:36,858 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:02:36,859 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:02:36,859 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:02:36,859 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:02:36,859 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-05 21:02:36,859 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:02:36,860 WARN L227 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:02:36,861 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-12-05 21:02:36,883 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:36,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 146 transitions, 362 flow [2023-12-05 21:02:36,899 INFO L124 PetriNetUnfolderBase]: 22/249 cut-off events. [2023-12-05 21:02:36,899 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-12-05 21:02:36,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 249 events. 22/249 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 677 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-12-05 21:02:36,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 146 transitions, 362 flow [2023-12-05 21:02:36,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 146 transitions, 362 flow [2023-12-05 21:02:36,903 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:36,903 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;@786b0ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:36,903 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:02:36,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:36,904 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:02:36,904 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:36,904 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:36,904 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:36,904 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:36,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:36,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1926328481, now seen corresponding path program 1 times [2023-12-05 21:02:36,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:36,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168034283] [2023-12-05 21:02:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:36,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:36,926 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 21:02:36,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168034283] [2023-12-05 21:02:36,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168034283] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:36,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:36,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218793785] [2023-12-05 21:02:36,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:36,927 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:36,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:36,928 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 146 [2023-12-05 21:02:36,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 146 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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 21:02:36,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:36,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 146 [2023-12-05 21:02:36,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:45,928 INFO L124 PetriNetUnfolderBase]: 40462/83834 cut-off events. [2023-12-05 21:02:45,928 INFO L125 PetriNetUnfolderBase]: For 40003/40003 co-relation queries the response was YES. [2023-12-05 21:02:46,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142350 conditions, 83834 events. 40462/83834 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 3647. Compared 975869 event pairs, 40462 based on Foata normal form. 44471/120289 useless extension candidates. Maximal degree in co-relation 43061. Up to 50302 conditions per place. [2023-12-05 21:02:47,015 INFO L140 encePairwiseOnDemand]: 128/146 looper letters, 27 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-12-05 21:02:47,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 103 transitions, 332 flow [2023-12-05 21:02:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-12-05 21:02:47,016 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.726027397260274 [2023-12-05 21:02:47,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-12-05 21:02:47,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-12-05 21:02:47,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:47,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-12-05 21:02:47,017 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 21:02:47,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 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 21:02:47,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 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 21:02:47,018 INFO L308 CegarLoopForPetriNet]: 146 programPoint places, -26 predicate places. [2023-12-05 21:02:47,018 INFO L500 AbstractCegarLoop]: Abstraction has has 120 places, 103 transitions, 332 flow [2023-12-05 21:02:47,019 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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 21:02:47,019 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:47,019 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:47,019 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-05 21:02:47,019 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:47,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1926328482, now seen corresponding path program 1 times [2023-12-05 21:02:47,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:47,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030310799] [2023-12-05 21:02:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:47,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:47,043 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 21:02:47,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:47,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030310799] [2023-12-05 21:02:47,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030310799] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:47,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:47,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170468069] [2023-12-05 21:02:47,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:47,044 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:47,045 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 146 [2023-12-05 21:02:47,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 103 transitions, 332 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 21:02:47,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:47,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 146 [2023-12-05 21:02:47,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:53,656 INFO L124 PetriNetUnfolderBase]: 26246/57594 cut-off events. [2023-12-05 21:02:53,656 INFO L125 PetriNetUnfolderBase]: For 45836/48750 co-relation queries the response was YES. [2023-12-05 21:02:54,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131424 conditions, 57594 events. 26246/57594 cut-off events. For 45836/48750 co-relation queries the response was YES. Maximal size of possible extension queue 2514. Compared 665937 event pairs, 26246 based on Foata normal form. 0/53951 useless extension candidates. Maximal degree in co-relation 39420. Up to 32806 conditions per place. [2023-12-05 21:02:54,406 INFO L140 encePairwiseOnDemand]: 144/146 looper letters, 25 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2023-12-05 21:02:54,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 102 transitions, 380 flow [2023-12-05 21:02:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-12-05 21:02:54,407 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6917808219178082 [2023-12-05 21:02:54,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-12-05 21:02:54,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-12-05 21:02:54,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:54,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-12-05 21:02:54,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 21:02:54,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 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 21:02:54,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 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 21:02:54,409 INFO L308 CegarLoopForPetriNet]: 146 programPoint places, -25 predicate places. [2023-12-05 21:02:54,409 INFO L500 AbstractCegarLoop]: Abstraction has has 121 places, 102 transitions, 380 flow [2023-12-05 21:02:54,409 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 21:02:54,409 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:54,409 INFO L233 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:54,409 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-05 21:02:54,409 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:54,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1424662133, now seen corresponding path program 1 times [2023-12-05 21:02:54,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:54,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120735724] [2023-12-05 21:02:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:54,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:54,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:02:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:54,452 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:02:54,452 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:02:54,452 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:02:54,452 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:02:54,453 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:02:54,453 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-05 21:02:54,453 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:02:54,453 WARN L227 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:02:54,453 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-12-05 21:02:54,472 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:54,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 163 transitions, 414 flow [2023-12-05 21:02:54,492 INFO L124 PetriNetUnfolderBase]: 25/281 cut-off events. [2023-12-05 21:02:54,492 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-12-05 21:02:54,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 281 events. 25/281 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 781 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 283. Up to 18 conditions per place. [2023-12-05 21:02:54,494 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 163 transitions, 414 flow [2023-12-05 21:02:54,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 163 transitions, 414 flow [2023-12-05 21:02:54,496 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:54,496 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;@786b0ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:54,496 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:02:54,497 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:54,497 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:02:54,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:54,497 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:54,497 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:54,497 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:02:54,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash -274911580, now seen corresponding path program 1 times [2023-12-05 21:02:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75392934] [2023-12-05 21:02:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:54,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:54,512 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 21:02:54,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:54,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75392934] [2023-12-05 21:02:54,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75392934] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:54,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:54,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:54,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397817214] [2023-12-05 21:02:54,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:54,513 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:54,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:54,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:54,514 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 163 [2023-12-05 21:02:54,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 163 transitions, 414 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 21:02:54,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:54,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 163 [2023-12-05 21:02:54,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:31,312 INFO L124 PetriNetUnfolderBase]: 141064/271187 cut-off events. [2023-12-05 21:03:31,313 INFO L125 PetriNetUnfolderBase]: For 158830/158830 co-relation queries the response was YES. [2023-12-05 21:03:33,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469672 conditions, 271187 events. 141064/271187 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 10454. Compared 3352209 event pairs, 141064 based on Foata normal form. 153092/400225 useless extension candidates. Maximal degree in co-relation 143420. Up to 170587 conditions per place. [2023-12-05 21:03:36,164 INFO L140 encePairwiseOnDemand]: 143/163 looper letters, 30 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-12-05 21:03:36,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 115 transitions, 380 flow [2023-12-05 21:03:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:03:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:03:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-12-05 21:03:36,166 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7280163599182005 [2023-12-05 21:03:36,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-12-05 21:03:36,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-12-05 21:03:36,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:36,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-12-05 21:03:36,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:36,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:36,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:36,168 INFO L308 CegarLoopForPetriNet]: 163 programPoint places, -29 predicate places. [2023-12-05 21:03:36,169 INFO L500 AbstractCegarLoop]: Abstraction has has 134 places, 115 transitions, 380 flow [2023-12-05 21:03:36,169 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:36,169 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:36,169 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:36,169 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-05 21:03:36,169 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-12-05 21:03:36,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash -274911579, now seen corresponding path program 1 times [2023-12-05 21:03:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344737882] [2023-12-05 21:03:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:36,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:36,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:36,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344737882] [2023-12-05 21:03:36,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344737882] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:36,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:36,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:36,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079915937] [2023-12-05 21:03:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:36,287 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:36,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:36,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:36,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:36,288 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 163 [2023-12-05 21:03:36,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 115 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:36,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:36,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 163 [2023-12-05 21:03:36,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand