/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/39_rand_lock_p0_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:04:50,704 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:04:50,742 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:04:50,759 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:04:50,759 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:04:50,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:04:50,760 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:04:50,760 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:04:50,760 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:04:50,761 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:04:50,761 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:04:50,761 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:04:50,761 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:04:50,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:04:50,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:04:50,762 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:04:50,762 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:04:50,762 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:04:50,763 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:04:50,763 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:04:50,763 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:04:50,764 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:04:50,764 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:04:50,764 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:04:50,764 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:04:50,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:04:50,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:04:50,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:04:50,765 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:04:50,765 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:04:50,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:04:50,766 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:04:50,766 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:04:50,766 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:04:51,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:04:51,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:04:51,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:04:51,026 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:04:51,027 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:04:51,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-12-05 21:04:52,202 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:04:52,451 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:04:52,452 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-12-05 21:04:52,465 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3044cfd/645313f7b9924fba8c4a564499d75f81/FLAG0f9fd55d0 [2023-12-05 21:04:52,475 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3044cfd/645313f7b9924fba8c4a564499d75f81 [2023-12-05 21:04:52,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:04:52,478 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:04:52,478 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:04:52,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:04:52,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:04:52,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5121c158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52, skipping insertion in model container [2023-12-05 21:04:52,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,531 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:04:52,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:04:52,800 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:04:52,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:04:52,856 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:04:52,856 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:04:52,861 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:04:52,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52 WrapperNode [2023-12-05 21:04:52,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:04:52,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:04:52,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:04:52,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:04:52,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,909 INFO L138 Inliner]: procedures = 175, calls = 21, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 78 [2023-12-05 21:04:52,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:04:52,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:04:52,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:04:52,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:04:52,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,927 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,927 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,932 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,943 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,944 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,946 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:04:52,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:04:52,947 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:04:52,947 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:04:52,947 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (1/1) ... [2023-12-05 21:04:52,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:04:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:04:52,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:04:52,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:04:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:04:53,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:04:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:04:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:04:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:04:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:04:53,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:04:53,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:04:53,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:04:53,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:04:53,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:04:53,003 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:04:53,097 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:04:53,098 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:04:53,200 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:04:53,229 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:04:53,230 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-05 21:04:53,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:04:53 BoogieIcfgContainer [2023-12-05 21:04:53,231 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:04:53,232 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:04:53,233 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:04:53,235 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:04:53,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:04:52" (1/3) ... [2023-12-05 21:04:53,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e13cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:04:53, skipping insertion in model container [2023-12-05 21:04:53,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:52" (2/3) ... [2023-12-05 21:04:53,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e13cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:04:53, skipping insertion in model container [2023-12-05 21:04:53,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:04:53" (3/3) ... [2023-12-05 21:04:53,236 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2023-12-05 21:04:53,248 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:04:53,248 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-05 21:04:53,248 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:04:53,278 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:53,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 136 flow [2023-12-05 21:04:53,329 INFO L124 PetriNetUnfolderBase]: 4/79 cut-off events. [2023-12-05 21:04:53,330 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:53,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 79 events. 4/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-12-05 21:04:53,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 136 flow [2023-12-05 21:04:53,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 66 transitions, 136 flow [2023-12-05 21:04:53,343 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:53,348 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;@11f2c642, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:53,348 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:04:53,353 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:53,353 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:04:53,353 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:53,353 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:53,354 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:53,354 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 21:04:53,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash -44629591, now seen corresponding path program 1 times [2023-12-05 21:04:53,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:53,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144958132] [2023-12-05 21:04:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:53,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:53,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144958132] [2023-12-05 21:04:53,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144958132] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:53,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:53,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:53,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008249463] [2023-12-05 21:04:53,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:53,568 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:53,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:53,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:53,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:53,593 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 66 [2023-12-05 21:04:53,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:53,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:53,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 66 [2023-12-05 21:04:53,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:53,647 INFO L124 PetriNetUnfolderBase]: 9/131 cut-off events. [2023-12-05 21:04:53,648 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:53,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 131 events. 9/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 249 event pairs, 6 based on Foata normal form. 8/129 useless extension candidates. Maximal degree in co-relation 129. Up to 21 conditions per place. [2023-12-05 21:04:53,649 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 10 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-12-05 21:04:53,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 140 flow [2023-12-05 21:04:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 159 transitions. [2023-12-05 21:04:53,659 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.803030303030303 [2023-12-05 21:04:53,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 159 transitions. [2023-12-05 21:04:53,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 159 transitions. [2023-12-05 21:04:53,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:53,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 159 transitions. [2023-12-05 21:04:53,664 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 21:04:53,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:53,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:53,674 INFO L308 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2023-12-05 21:04:53,675 INFO L500 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 140 flow [2023-12-05 21:04:53,675 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:53,676 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:53,676 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:53,676 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:04:53,676 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 21:04:53,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:53,677 INFO L85 PathProgramCache]: Analyzing trace with hash -44629590, now seen corresponding path program 1 times [2023-12-05 21:04:53,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:53,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372907999] [2023-12-05 21:04:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:53,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:53,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:53,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372907999] [2023-12-05 21:04:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372907999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:53,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:53,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:53,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249978921] [2023-12-05 21:04:53,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:53,813 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:53,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:53,815 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 66 [2023-12-05 21:04:53,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:53,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:53,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 66 [2023-12-05 21:04:53,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:53,858 INFO L124 PetriNetUnfolderBase]: 5/95 cut-off events. [2023-12-05 21:04:53,858 INFO L125 PetriNetUnfolderBase]: For 9/11 co-relation queries the response was YES. [2023-12-05 21:04:53,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 95 events. 5/95 cut-off events. For 9/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 3 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 97. Up to 13 conditions per place. [2023-12-05 21:04:53,859 INFO L140 encePairwiseOnDemand]: 64/66 looper letters, 8 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-12-05 21:04:53,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 154 flow [2023-12-05 21:04:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-12-05 21:04:53,865 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7929292929292929 [2023-12-05 21:04:53,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-12-05 21:04:53,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-12-05 21:04:53,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:53,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-12-05 21:04:53,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:53,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:53,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:53,868 INFO L308 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2023-12-05 21:04:53,868 INFO L500 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 154 flow [2023-12-05 21:04:53,869 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:53,869 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:53,869 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 21:04:53,869 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:04:53,869 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 21:04:53,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:53,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1659691952, now seen corresponding path program 1 times [2023-12-05 21:04:53,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:53,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978199930] [2023-12-05 21:04:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:53,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:53,887 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:53,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:53,928 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:53,928 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:04:53,930 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:04:53,931 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:04:53,931 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:04:53,931 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:04:53,934 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:53,935 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:04:53,975 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:53,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 105 transitions, 220 flow [2023-12-05 21:04:54,000 INFO L124 PetriNetUnfolderBase]: 7/133 cut-off events. [2023-12-05 21:04:54,000 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:04:54,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 133 events. 7/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 252 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-12-05 21:04:54,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 105 transitions, 220 flow [2023-12-05 21:04:54,002 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 105 transitions, 220 flow [2023-12-05 21:04:54,003 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:54,007 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;@11f2c642, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:54,007 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:04:54,009 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:54,009 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:04:54,009 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:54,010 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:54,010 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:54,010 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 21:04:54,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:54,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1831499214, now seen corresponding path program 1 times [2023-12-05 21:04:54,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:54,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011957181] [2023-12-05 21:04:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:54,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:54,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:54,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011957181] [2023-12-05 21:04:54,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011957181] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:54,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:54,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435437051] [2023-12-05 21:04:54,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:54,056 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:54,057 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 105 [2023-12-05 21:04:54,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 105 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:54,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 105 [2023-12-05 21:04:54,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:54,148 INFO L124 PetriNetUnfolderBase]: 87/767 cut-off events. [2023-12-05 21:04:54,148 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-12-05 21:04:54,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 918 conditions, 767 events. 87/767 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4777 event pairs, 66 based on Foata normal form. 44/758 useless extension candidates. Maximal degree in co-relation 581. Up to 129 conditions per place. [2023-12-05 21:04:54,156 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 14 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2023-12-05 21:04:54,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 95 transitions, 230 flow [2023-12-05 21:04:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-12-05 21:04:54,159 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2023-12-05 21:04:54,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-12-05 21:04:54,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-12-05 21:04:54,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:54,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-12-05 21:04:54,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,163 INFO L308 CegarLoopForPetriNet]: 105 programPoint places, -5 predicate places. [2023-12-05 21:04:54,163 INFO L500 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 230 flow [2023-12-05 21:04:54,163 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,163 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:54,163 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:54,163 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:04:54,164 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 21:04:54,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1831499213, now seen corresponding path program 1 times [2023-12-05 21:04:54,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:54,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261737791] [2023-12-05 21:04:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:54,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:54,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:54,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261737791] [2023-12-05 21:04:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261737791] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:54,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:54,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:54,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817249548] [2023-12-05 21:04:54,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:54,241 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:54,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:54,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:54,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:54,244 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 105 [2023-12-05 21:04:54,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:54,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 105 [2023-12-05 21:04:54,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:54,305 INFO L124 PetriNetUnfolderBase]: 53/523 cut-off events. [2023-12-05 21:04:54,306 INFO L125 PetriNetUnfolderBase]: For 43/59 co-relation queries the response was YES. [2023-12-05 21:04:54,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 523 events. 53/523 cut-off events. For 43/59 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2682 event pairs, 39 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 429. Up to 81 conditions per place. [2023-12-05 21:04:54,309 INFO L140 encePairwiseOnDemand]: 103/105 looper letters, 12 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2023-12-05 21:04:54,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 252 flow [2023-12-05 21:04:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-12-05 21:04:54,311 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.834920634920635 [2023-12-05 21:04:54,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-12-05 21:04:54,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-12-05 21:04:54,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:54,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-12-05 21:04:54,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,316 INFO L308 CegarLoopForPetriNet]: 105 programPoint places, -4 predicate places. [2023-12-05 21:04:54,316 INFO L500 AbstractCegarLoop]: Abstraction has has 101 places, 94 transitions, 252 flow [2023-12-05 21:04:54,316 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,316 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:54,317 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 21:04:54,317 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:04:54,317 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 21:04:54,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash -282160602, now seen corresponding path program 1 times [2023-12-05 21:04:54,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:54,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196106783] [2023-12-05 21:04:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:54,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:54,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:54,362 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:54,362 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:54,362 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:04:54,363 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:04:54,366 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:04:54,366 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:04:54,366 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:04:54,367 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:54,367 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:04:54,426 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:54,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 144 transitions, 306 flow [2023-12-05 21:04:54,448 INFO L124 PetriNetUnfolderBase]: 10/187 cut-off events. [2023-12-05 21:04:54,449 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:04:54,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 187 events. 10/187 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 480 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-12-05 21:04:54,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 144 transitions, 306 flow [2023-12-05 21:04:54,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 144 transitions, 306 flow [2023-12-05 21:04:54,454 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:54,456 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;@11f2c642, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:54,458 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:04:54,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:54,460 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:04:54,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:54,460 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:54,460 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:54,460 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 21:04:54,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:54,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1730890946, now seen corresponding path program 1 times [2023-12-05 21:04:54,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:54,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367965732] [2023-12-05 21:04:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:54,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:54,499 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 21:04:54,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367965732] [2023-12-05 21:04:54,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367965732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:54,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:54,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:54,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373344548] [2023-12-05 21:04:54,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:54,500 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:54,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:54,502 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2023-12-05 21:04:54,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 144 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:54,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2023-12-05 21:04:54,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:54,842 INFO L124 PetriNetUnfolderBase]: 543/3459 cut-off events. [2023-12-05 21:04:54,842 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-12-05 21:04:54,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4251 conditions, 3459 events. 543/3459 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 32844 event pairs, 450 based on Foata normal form. 233/3440 useless extension candidates. Maximal degree in co-relation 910. Up to 705 conditions per place. [2023-12-05 21:04:54,862 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 18 selfloop transitions, 1 changer transitions 0/133 dead transitions. [2023-12-05 21:04:54,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 133 transitions, 322 flow [2023-12-05 21:04:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2023-12-05 21:04:54,863 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8634259259259259 [2023-12-05 21:04:54,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2023-12-05 21:04:54,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2023-12-05 21:04:54,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:54,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2023-12-05 21:04:54,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,868 INFO L308 CegarLoopForPetriNet]: 144 programPoint places, -5 predicate places. [2023-12-05 21:04:54,868 INFO L500 AbstractCegarLoop]: Abstraction has has 139 places, 133 transitions, 322 flow [2023-12-05 21:04:54,869 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:54,869 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:54,869 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:54,869 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:04:54,869 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 21:04:54,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:54,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1730890947, now seen corresponding path program 1 times [2023-12-05 21:04:54,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:54,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534105666] [2023-12-05 21:04:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:54,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:54,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:54,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534105666] [2023-12-05 21:04:54,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534105666] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:54,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:54,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:54,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895739822] [2023-12-05 21:04:54,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:54,918 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:54,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:54,921 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 144 [2023-12-05 21:04:54,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 133 transitions, 322 flow. Second operand has 3 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 21:04:54,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:54,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 144 [2023-12-05 21:04:54,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:55,178 INFO L124 PetriNetUnfolderBase]: 341/2335 cut-off events. [2023-12-05 21:04:55,178 INFO L125 PetriNetUnfolderBase]: For 277/571 co-relation queries the response was YES. [2023-12-05 21:04:55,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3324 conditions, 2335 events. 341/2335 cut-off events. For 277/571 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 19828 event pairs, 279 based on Foata normal form. 0/2224 useless extension candidates. Maximal degree in co-relation 702. Up to 449 conditions per place. [2023-12-05 21:04:55,195 INFO L140 encePairwiseOnDemand]: 142/144 looper letters, 16 selfloop transitions, 1 changer transitions 0/132 dead transitions. [2023-12-05 21:04:55,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 132 transitions, 352 flow [2023-12-05 21:04:55,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-12-05 21:04:55,197 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8541666666666666 [2023-12-05 21:04:55,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-12-05 21:04:55,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-12-05 21:04:55,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:55,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-12-05 21:04:55,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:55,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:55,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:55,200 INFO L308 CegarLoopForPetriNet]: 144 programPoint places, -4 predicate places. [2023-12-05 21:04:55,200 INFO L500 AbstractCegarLoop]: Abstraction has has 140 places, 132 transitions, 352 flow [2023-12-05 21:04:55,200 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 21:04:55,201 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:55,201 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 21:04:55,201 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:04:55,201 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 21:04:55,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:55,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1196489960, now seen corresponding path program 1 times [2023-12-05 21:04:55,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:55,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757847962] [2023-12-05 21:04:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:55,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:55,218 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:55,236 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:55,236 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:55,236 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:04:55,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:04:55,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:04:55,237 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:04:55,237 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:04:55,237 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:55,238 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-05 21:04:55,275 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:55,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 183 transitions, 394 flow [2023-12-05 21:04:55,296 INFO L124 PetriNetUnfolderBase]: 13/241 cut-off events. [2023-12-05 21:04:55,296 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-12-05 21:04:55,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 241 events. 13/241 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 726 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 195. Up to 10 conditions per place. [2023-12-05 21:04:55,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 183 transitions, 394 flow [2023-12-05 21:04:55,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 183 transitions, 394 flow [2023-12-05 21:04:55,301 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:55,302 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;@11f2c642, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:55,302 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:04:55,304 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:55,304 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:04:55,304 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:55,304 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:55,304 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:55,304 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 21:04:55,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2052606297, now seen corresponding path program 1 times [2023-12-05 21:04:55,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:55,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745439789] [2023-12-05 21:04:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:55,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:55,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:55,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745439789] [2023-12-05 21:04:55,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745439789] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:55,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:55,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:55,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921705717] [2023-12-05 21:04:55,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:55,332 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:55,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:55,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:55,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:55,333 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 183 [2023-12-05 21:04:55,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 183 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:55,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:55,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 183 [2023-12-05 21:04:55,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:56,933 INFO L124 PetriNetUnfolderBase]: 2943/14803 cut-off events. [2023-12-05 21:04:56,933 INFO L125 PetriNetUnfolderBase]: For 1052/1052 co-relation queries the response was YES. [2023-12-05 21:04:57,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18796 conditions, 14803 events. 2943/14803 cut-off events. For 1052/1052 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 182615 event pairs, 2562 based on Foata normal form. 1181/14915 useless extension candidates. Maximal degree in co-relation 4253. Up to 3585 conditions per place. [2023-12-05 21:04:57,127 INFO L140 encePairwiseOnDemand]: 175/183 looper letters, 22 selfloop transitions, 1 changer transitions 0/171 dead transitions. [2023-12-05 21:04:57,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 171 transitions, 416 flow [2023-12-05 21:04:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-12-05 21:04:57,129 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8743169398907104 [2023-12-05 21:04:57,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-12-05 21:04:57,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-12-05 21:04:57,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:57,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-12-05 21:04:57,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:57,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:57,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:57,132 INFO L308 CegarLoopForPetriNet]: 183 programPoint places, -5 predicate places. [2023-12-05 21:04:57,132 INFO L500 AbstractCegarLoop]: Abstraction has has 178 places, 171 transitions, 416 flow [2023-12-05 21:04:57,132 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:57,132 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:57,132 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:57,132 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:04:57,133 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 21:04:57,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:57,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2052606298, now seen corresponding path program 1 times [2023-12-05 21:04:57,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:57,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933413004] [2023-12-05 21:04:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:57,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:57,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:57,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933413004] [2023-12-05 21:04:57,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933413004] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:57,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:57,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:57,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425624361] [2023-12-05 21:04:57,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:57,163 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:57,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:57,164 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 183 [2023-12-05 21:04:57,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 171 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:57,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:57,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 183 [2023-12-05 21:04:57,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:58,235 INFO L124 PetriNetUnfolderBase]: 1877/9967 cut-off events. [2023-12-05 21:04:58,235 INFO L125 PetriNetUnfolderBase]: For 1631/3619 co-relation queries the response was YES. [2023-12-05 21:04:58,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14989 conditions, 9967 events. 1877/9967 cut-off events. For 1631/3619 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 114368 event pairs, 1623 based on Foata normal form. 0/9478 useless extension candidates. Maximal degree in co-relation 3321. Up to 2305 conditions per place. [2023-12-05 21:04:58,297 INFO L140 encePairwiseOnDemand]: 181/183 looper letters, 20 selfloop transitions, 1 changer transitions 0/170 dead transitions. [2023-12-05 21:04:58,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 170 transitions, 454 flow [2023-12-05 21:04:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-12-05 21:04:58,298 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8652094717668488 [2023-12-05 21:04:58,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-12-05 21:04:58,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-12-05 21:04:58,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:58,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-12-05 21:04:58,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:58,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:58,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:58,301 INFO L308 CegarLoopForPetriNet]: 183 programPoint places, -4 predicate places. [2023-12-05 21:04:58,301 INFO L500 AbstractCegarLoop]: Abstraction has has 179 places, 170 transitions, 454 flow [2023-12-05 21:04:58,301 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:58,301 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:58,301 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 21:04:58,301 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:04:58,301 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 21:04:58,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:58,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1278355793, now seen corresponding path program 1 times [2023-12-05 21:04:58,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:58,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893638767] [2023-12-05 21:04:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:58,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:58,312 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:58,320 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:58,320 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:58,320 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:04:58,320 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:04:58,321 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:04:58,321 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:04:58,321 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:04:58,321 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:58,321 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-12-05 21:04:58,348 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:58,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 222 transitions, 484 flow [2023-12-05 21:04:58,373 INFO L124 PetriNetUnfolderBase]: 16/295 cut-off events. [2023-12-05 21:04:58,373 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-12-05 21:04:58,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 295 events. 16/295 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 967 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 254. Up to 12 conditions per place. [2023-12-05 21:04:58,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 222 transitions, 484 flow [2023-12-05 21:04:58,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 222 transitions, 484 flow [2023-12-05 21:04:58,378 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:58,378 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;@11f2c642, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:58,378 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:04:58,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:58,379 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:04:58,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:58,379 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:58,379 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:58,379 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 21:04:58,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash -866353161, now seen corresponding path program 1 times [2023-12-05 21:04:58,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:58,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125218166] [2023-12-05 21:04:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:58,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:58,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:58,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125218166] [2023-12-05 21:04:58,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125218166] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:58,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:58,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:58,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94022108] [2023-12-05 21:04:58,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:58,398 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:58,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:58,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:58,399 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 222 [2023-12-05 21:04:58,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 222 transitions, 484 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:58,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:58,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 222 [2023-12-05 21:04:58,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:05:06,307 INFO L124 PetriNetUnfolderBase]: 14847/62483 cut-off events. [2023-12-05 21:05:06,307 INFO L125 PetriNetUnfolderBase]: For 6748/6748 co-relation queries the response was YES. [2023-12-05 21:05:06,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81837 conditions, 62483 events. 14847/62483 cut-off events. For 6748/6748 co-relation queries the response was YES. Maximal size of possible extension queue 1713. Compared 927955 event pairs, 13314 based on Foata normal form. 5741/63884 useless extension candidates. Maximal degree in co-relation 18861. Up to 17409 conditions per place. [2023-12-05 21:05:07,311 INFO L140 encePairwiseOnDemand]: 213/222 looper letters, 26 selfloop transitions, 1 changer transitions 0/209 dead transitions. [2023-12-05 21:05:07,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 209 transitions, 512 flow [2023-12-05 21:05:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:05:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:05:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-12-05 21:05:07,313 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8813813813813813 [2023-12-05 21:05:07,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-12-05 21:05:07,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-12-05 21:05:07,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:05:07,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-12-05 21:05:07,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 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 21:05:07,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 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 21:05:07,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 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 21:05:07,316 INFO L308 CegarLoopForPetriNet]: 222 programPoint places, -5 predicate places. [2023-12-05 21:05:07,316 INFO L500 AbstractCegarLoop]: Abstraction has has 217 places, 209 transitions, 512 flow [2023-12-05 21:05:07,316 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 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 21:05:07,316 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:05:07,316 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:05:07,316 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-05 21:05:07,316 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 21:05:07,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:05:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash -866353160, now seen corresponding path program 1 times [2023-12-05 21:05:07,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:05:07,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280915655] [2023-12-05 21:05:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:05:07,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:05:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:05:07,354 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 21:05:07,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:05:07,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280915655] [2023-12-05 21:05:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280915655] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:05:07,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:05:07,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:05:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105702708] [2023-12-05 21:05:07,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:05:07,355 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:05:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:05:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:05:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:05:07,356 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 222 [2023-12-05 21:05:07,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 209 transitions, 512 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:05:07,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:05:07,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 222 [2023-12-05 21:05:07,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:05:13,446 INFO L124 PetriNetUnfolderBase]: 9557/42031 cut-off events. [2023-12-05 21:05:13,446 INFO L125 PetriNetUnfolderBase]: For 9098/17994 co-relation queries the response was YES. [2023-12-05 21:05:13,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66510 conditions, 42031 events. 9557/42031 cut-off events. For 9098/17994 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 592204 event pairs, 8535 based on Foata normal form. 0/40027 useless extension candidates. Maximal degree in co-relation 15049. Up to 11265 conditions per place. [2023-12-05 21:05:14,167 INFO L140 encePairwiseOnDemand]: 220/222 looper letters, 24 selfloop transitions, 1 changer transitions 0/208 dead transitions. [2023-12-05 21:05:14,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 208 transitions, 558 flow [2023-12-05 21:05:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:05:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:05:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2023-12-05 21:05:14,168 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8723723723723724 [2023-12-05 21:05:14,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2023-12-05 21:05:14,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2023-12-05 21:05:14,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:05:14,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2023-12-05 21:05:14,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 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 21:05:14,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 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 21:05:14,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 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 21:05:14,171 INFO L308 CegarLoopForPetriNet]: 222 programPoint places, -4 predicate places. [2023-12-05 21:05:14,171 INFO L500 AbstractCegarLoop]: Abstraction has has 218 places, 208 transitions, 558 flow [2023-12-05 21:05:14,172 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:05:14,172 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:05:14,172 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 21:05:14,172 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-05 21:05:14,172 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 21:05:14,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:05:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1741831132, now seen corresponding path program 1 times [2023-12-05 21:05:14,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:05:14,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278580333] [2023-12-05 21:05:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:05:14,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:05:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:05:14,185 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:05:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:05:14,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:05:14,196 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:05:14,196 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-05 21:05:14,196 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 3 remaining) [2023-12-05 21:05:14,196 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 3 remaining) [2023-12-05 21:05:14,196 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-05 21:05:14,197 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-05 21:05:14,197 WARN L227 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:05:14,197 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-12-05 21:05:14,235 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:05:14,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 261 transitions, 576 flow [2023-12-05 21:05:14,269 INFO L124 PetriNetUnfolderBase]: 19/349 cut-off events. [2023-12-05 21:05:14,270 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-12-05 21:05:14,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 349 events. 19/349 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1213 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 314. Up to 14 conditions per place. [2023-12-05 21:05:14,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 261 transitions, 576 flow [2023-12-05 21:05:14,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 261 transitions, 576 flow [2023-12-05 21:05:14,277 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:05:14,277 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;@11f2c642, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:05:14,277 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-05 21:05:14,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:05:14,278 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:05:14,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:05:14,278 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:05:14,278 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:05:14,278 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 21:05:14,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:05:14,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1563947164, now seen corresponding path program 1 times [2023-12-05 21:05:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:05:14,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360703414] [2023-12-05 21:05:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:05:14,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:05:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:05:14,304 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 21:05:14,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:05:14,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360703414] [2023-12-05 21:05:14,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360703414] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:05:14,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:05:14,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:05:14,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572004950] [2023-12-05 21:05:14,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:05:14,306 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:05:14,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:05:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:05:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:05:14,307 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 261 [2023-12-05 21:05:14,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 261 transitions, 576 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 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 21:05:14,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:05:14,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 261 [2023-12-05 21:05:14,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand