/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/35_double_lock_p3_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:04:39,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:04:39,915 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 21:04:39,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:04:39,945 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:04:39,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:04:39,946 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:04:39,946 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:04:39,946 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:04:39,949 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:04:39,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:04:39,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:04:39,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:04:39,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:04:39,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:04:39,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:04:39,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:04:39,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:04:39,952 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:04:39,952 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:04:39,952 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:04:39,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:04:39,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:04:39,953 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:04:39,953 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:04:39,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:04:39,953 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:04:39,953 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:04:39,954 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:04:39,954 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:04:39,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:04:39,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:04:39,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:04:39,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:04:40,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:04:40,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:04:40,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:04:40,175 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:04:40,176 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:04:40,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-12-05 21:04:41,311 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:04:41,479 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:04:41,479 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-12-05 21:04:41,489 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d806a7d5/5e3b3957cc88485eadb2484d24b3e121/FLAG523a117b2 [2023-12-05 21:04:41,501 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d806a7d5/5e3b3957cc88485eadb2484d24b3e121 [2023-12-05 21:04:41,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:04:41,504 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:04:41,505 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:04:41,505 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:04:41,515 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:04:41,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,516 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6071ad99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41, skipping insertion in model container [2023-12-05 21:04:41,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,547 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:04:41,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:04:41,809 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:04:41,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:04:41,871 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:04:41,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41 WrapperNode [2023-12-05 21:04:41,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:04:41,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:04:41,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:04:41,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:04:41,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,928 INFO L138 Inliner]: procedures = 172, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 128 [2023-12-05 21:04:41,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:04:41,929 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:04:41,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:04:41,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:04:41,934 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,947 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,960 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,962 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,963 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,965 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:04:41,966 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:04:41,966 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:04:41,966 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:04:41,967 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (1/1) ... [2023-12-05 21:04:41,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:04:41,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:04:42,032 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 21:04:42,062 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 21:04:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:04:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-12-05 21:04:42,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-12-05 21:04:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:04:42,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:04:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:04:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:04:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:04:42,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:04:42,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:04:42,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:04:42,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:04:42,072 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 21:04:42,257 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:04:42,261 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:04:42,575 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:04:42,705 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:04:42,705 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-05 21:04:42,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:04:42 BoogieIcfgContainer [2023-12-05 21:04:42,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:04:42,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:04:42,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:04:42,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:04:42,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:04:41" (1/3) ... [2023-12-05 21:04:42,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c7a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:04:42, skipping insertion in model container [2023-12-05 21:04:42,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:04:41" (2/3) ... [2023-12-05 21:04:42,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1c7a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:04:42, skipping insertion in model container [2023-12-05 21:04:42,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:04:42" (3/3) ... [2023-12-05 21:04:42,714 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-12-05 21:04:42,728 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:04:42,728 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-12-05 21:04:42,728 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:04:42,791 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:42,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 108 transitions, 224 flow [2023-12-05 21:04:42,877 INFO L124 PetriNetUnfolderBase]: 7/120 cut-off events. [2023-12-05 21:04:42,877 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:42,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 120 events. 7/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 269 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 102. Up to 4 conditions per place. [2023-12-05 21:04:42,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 108 transitions, 224 flow [2023-12-05 21:04:42,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 221 flow [2023-12-05 21:04:42,904 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:42,911 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;@359a73f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:42,911 INFO L363 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2023-12-05 21:04:42,918 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:42,918 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-12-05 21:04:42,919 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:42,919 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:42,920 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:42,920 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-12-05 21:04:42,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1432605793, now seen corresponding path program 1 times [2023-12-05 21:04:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:42,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33836047] [2023-12-05 21:04:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:42,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:43,184 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 21:04:43,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33836047] [2023-12-05 21:04:43,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33836047] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:43,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:43,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112963049] [2023-12-05 21:04:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:43,193 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:43,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:43,221 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 108 [2023-12-05 21:04:43,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:43,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 108 [2023-12-05 21:04:43,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:43,410 INFO L124 PetriNetUnfolderBase]: 543/1239 cut-off events. [2023-12-05 21:04:43,410 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-05 21:04:43,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2096 conditions, 1239 events. 543/1239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8057 event pairs, 412 based on Foata normal form. 262/942 useless extension candidates. Maximal degree in co-relation 2062. Up to 832 conditions per place. [2023-12-05 21:04:43,425 INFO L140 encePairwiseOnDemand]: 87/108 looper letters, 29 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-12-05 21:04:43,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 221 flow [2023-12-05 21:04:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-12-05 21:04:43,435 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.654320987654321 [2023-12-05 21:04:43,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-12-05 21:04:43,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-12-05 21:04:43,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:43,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-12-05 21:04:43,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,451 INFO L308 CegarLoopForPetriNet]: 107 programPoint places, -24 predicate places. [2023-12-05 21:04:43,452 INFO L500 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 221 flow [2023-12-05 21:04:43,452 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,452 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:43,452 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:43,453 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:04:43,453 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-12-05 21:04:43,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1432605792, now seen corresponding path program 1 times [2023-12-05 21:04:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:43,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974925520] [2023-12-05 21:04:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:43,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:43,541 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 21:04:43,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:43,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974925520] [2023-12-05 21:04:43,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974925520] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:43,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:43,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:43,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112351372] [2023-12-05 21:04:43,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:43,543 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:43,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:43,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:43,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:43,544 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 108 [2023-12-05 21:04:43,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:43,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 108 [2023-12-05 21:04:43,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:43,676 INFO L124 PetriNetUnfolderBase]: 334/863 cut-off events. [2023-12-05 21:04:43,677 INFO L125 PetriNetUnfolderBase]: For 70/128 co-relation queries the response was YES. [2023-12-05 21:04:43,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941 conditions, 863 events. 334/863 cut-off events. For 70/128 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5234 event pairs, 245 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 1901. Up to 524 conditions per place. [2023-12-05 21:04:43,682 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 26 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-12-05 21:04:43,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 267 flow [2023-12-05 21:04:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 194 transitions. [2023-12-05 21:04:43,684 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5987654320987654 [2023-12-05 21:04:43,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 194 transitions. [2023-12-05 21:04:43,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 194 transitions. [2023-12-05 21:04:43,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:43,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 194 transitions. [2023-12-05 21:04:43,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,687 INFO L308 CegarLoopForPetriNet]: 107 programPoint places, -24 predicate places. [2023-12-05 21:04:43,687 INFO L500 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 267 flow [2023-12-05 21:04:43,687 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,687 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:43,687 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:43,687 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:04:43,687 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-12-05 21:04:43,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1682459687, now seen corresponding path program 1 times [2023-12-05 21:04:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:43,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501551666] [2023-12-05 21:04:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:43,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:43,818 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 21:04:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501551666] [2023-12-05 21:04:43,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501551666] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:43,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:43,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:43,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600364290] [2023-12-05 21:04:43,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:43,822 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:43,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:43,825 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 108 [2023-12-05 21:04:43,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 267 flow. Second operand has 6 states, 6 states have (on average 53.833333333333336) internal successors, (323), 6 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:43,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 108 [2023-12-05 21:04:43,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:43,927 INFO L124 PetriNetUnfolderBase]: 159/496 cut-off events. [2023-12-05 21:04:43,928 INFO L125 PetriNetUnfolderBase]: For 148/212 co-relation queries the response was YES. [2023-12-05 21:04:43,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 496 events. 159/496 cut-off events. For 148/212 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2592 event pairs, 115 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 1244. Up to 258 conditions per place. [2023-12-05 21:04:43,931 INFO L140 encePairwiseOnDemand]: 100/108 looper letters, 22 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-12-05 21:04:43,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 69 transitions, 279 flow [2023-12-05 21:04:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:04:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:04:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 238 transitions. [2023-12-05 21:04:43,938 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5509259259259259 [2023-12-05 21:04:43,938 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 238 transitions. [2023-12-05 21:04:43,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 238 transitions. [2023-12-05 21:04:43,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:43,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 238 transitions. [2023-12-05 21:04:43,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,942 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,942 INFO L308 CegarLoopForPetriNet]: 107 programPoint places, -27 predicate places. [2023-12-05 21:04:43,943 INFO L500 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 279 flow [2023-12-05 21:04:43,943 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.833333333333336) internal successors, (323), 6 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:43,943 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:43,943 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:43,943 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:04:43,943 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-12-05 21:04:43,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:43,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1682459688, now seen corresponding path program 1 times [2023-12-05 21:04:43,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:43,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610292788] [2023-12-05 21:04:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:43,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:44,152 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 21:04:44,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610292788] [2023-12-05 21:04:44,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610292788] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:44,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:44,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:04:44,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812262165] [2023-12-05 21:04:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:44,153 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:04:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:44,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:04:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:04:44,158 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 108 [2023-12-05 21:04:44,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:44,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:44,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 108 [2023-12-05 21:04:44,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:44,202 INFO L124 PetriNetUnfolderBase]: 48/233 cut-off events. [2023-12-05 21:04:44,202 INFO L125 PetriNetUnfolderBase]: For 191/233 co-relation queries the response was YES. [2023-12-05 21:04:44,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597 conditions, 233 events. 48/233 cut-off events. For 191/233 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 841 event pairs, 33 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 537. Up to 85 conditions per place. [2023-12-05 21:04:44,204 INFO L140 encePairwiseOnDemand]: 100/108 looper letters, 14 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-12-05 21:04:44,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 63 transitions, 263 flow [2023-12-05 21:04:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:04:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:04:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 258 transitions. [2023-12-05 21:04:44,206 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2023-12-05 21:04:44,206 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 258 transitions. [2023-12-05 21:04:44,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 258 transitions. [2023-12-05 21:04:44,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:44,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 258 transitions. [2023-12-05 21:04:44,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:44,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:44,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:44,210 INFO L308 CegarLoopForPetriNet]: 107 programPoint places, -30 predicate places. [2023-12-05 21:04:44,210 INFO L500 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 263 flow [2023-12-05 21:04:44,210 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:44,210 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:44,210 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:44,211 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:04:44,211 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2023-12-05 21:04:44,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:44,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1239830084, now seen corresponding path program 1 times [2023-12-05 21:04:44,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:44,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737201172] [2023-12-05 21:04:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:44,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:44,232 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:44,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:44,259 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:44,260 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (53 of 54 remaining) [2023-12-05 21:04:44,263 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 54 remaining) [2023-12-05 21:04:44,263 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 54 remaining) [2023-12-05 21:04:44,263 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 54 remaining) [2023-12-05 21:04:44,264 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 54 remaining) [2023-12-05 21:04:44,265 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 54 remaining) [2023-12-05 21:04:44,265 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 54 remaining) [2023-12-05 21:04:44,265 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 54 remaining) [2023-12-05 21:04:44,265 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 54 remaining) [2023-12-05 21:04:44,265 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 54 remaining) [2023-12-05 21:04:44,299 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 54 remaining) [2023-12-05 21:04:44,299 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 54 remaining) [2023-12-05 21:04:44,299 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 54 remaining) [2023-12-05 21:04:44,299 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 54 remaining) [2023-12-05 21:04:44,299 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 54 remaining) [2023-12-05 21:04:44,299 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 54 remaining) [2023-12-05 21:04:44,300 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 54 remaining) [2023-12-05 21:04:44,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 54 remaining) [2023-12-05 21:04:44,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 54 remaining) [2023-12-05 21:04:44,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 54 remaining) [2023-12-05 21:04:44,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 54 remaining) [2023-12-05 21:04:44,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 54 remaining) [2023-12-05 21:04:44,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 54 remaining) [2023-12-05 21:04:44,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 54 remaining) [2023-12-05 21:04:44,304 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 54 remaining) [2023-12-05 21:04:44,304 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 54 remaining) [2023-12-05 21:04:44,304 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 54 remaining) [2023-12-05 21:04:44,304 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 54 remaining) [2023-12-05 21:04:44,304 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 54 remaining) [2023-12-05 21:04:44,304 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 54 remaining) [2023-12-05 21:04:44,304 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 54 remaining) [2023-12-05 21:04:44,304 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 54 remaining) [2023-12-05 21:04:44,305 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 54 remaining) [2023-12-05 21:04:44,307 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 54 remaining) [2023-12-05 21:04:44,307 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 54 remaining) [2023-12-05 21:04:44,307 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 54 remaining) [2023-12-05 21:04:44,307 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 54 remaining) [2023-12-05 21:04:44,307 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 54 remaining) [2023-12-05 21:04:44,308 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 54 remaining) [2023-12-05 21:04:44,308 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 54 remaining) [2023-12-05 21:04:44,308 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 54 remaining) [2023-12-05 21:04:44,309 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 54 remaining) [2023-12-05 21:04:44,309 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 54 remaining) [2023-12-05 21:04:44,309 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 54 remaining) [2023-12-05 21:04:44,309 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 54 remaining) [2023-12-05 21:04:44,309 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:04:44,310 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:04:44,312 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:44,312 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:04:44,364 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:44,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 178 transitions, 376 flow [2023-12-05 21:04:44,388 INFO L124 PetriNetUnfolderBase]: 9/179 cut-off events. [2023-12-05 21:04:44,389 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:04:44,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 179 events. 9/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 550 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 186. Up to 6 conditions per place. [2023-12-05 21:04:44,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 178 transitions, 376 flow [2023-12-05 21:04:44,393 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 151 transitions, 315 flow [2023-12-05 21:04:44,399 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:44,400 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;@359a73f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:44,400 INFO L363 AbstractCegarLoop]: Starting to check reachability of 78 error locations. [2023-12-05 21:04:44,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:44,402 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-12-05 21:04:44,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:44,402 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:44,402 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:44,402 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-12-05 21:04:44,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:44,402 INFO L85 PathProgramCache]: Analyzing trace with hash 96041553, now seen corresponding path program 1 times [2023-12-05 21:04:44,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:44,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412780056] [2023-12-05 21:04:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:44,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:44,427 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 21:04:44,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:44,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412780056] [2023-12-05 21:04:44,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412780056] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:44,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:44,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:44,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760938876] [2023-12-05 21:04:44,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:44,428 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:44,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:44,429 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 178 [2023-12-05 21:04:44,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 151 transitions, 315 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:44,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:44,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 178 [2023-12-05 21:04:44,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:46,434 INFO L124 PetriNetUnfolderBase]: 10615/19816 cut-off events. [2023-12-05 21:04:46,434 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2023-12-05 21:04:46,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34519 conditions, 19816 events. 10615/19816 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 185280 event pairs, 8914 based on Foata normal form. 3452/13747 useless extension candidates. Maximal degree in co-relation 34484. Up to 14404 conditions per place. [2023-12-05 21:04:46,622 INFO L140 encePairwiseOnDemand]: 149/178 looper letters, 42 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2023-12-05 21:04:46,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 113 transitions, 325 flow [2023-12-05 21:04:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-12-05 21:04:46,624 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6217228464419475 [2023-12-05 21:04:46,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-12-05 21:04:46,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-12-05 21:04:46,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:46,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-12-05 21:04:46,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:46,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:46,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:46,628 INFO L308 CegarLoopForPetriNet]: 152 programPoint places, -32 predicate places. [2023-12-05 21:04:46,628 INFO L500 AbstractCegarLoop]: Abstraction has has 120 places, 113 transitions, 325 flow [2023-12-05 21:04:46,628 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:46,628 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:46,628 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:46,628 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:04:46,628 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-12-05 21:04:46,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:46,629 INFO L85 PathProgramCache]: Analyzing trace with hash 96041554, now seen corresponding path program 1 times [2023-12-05 21:04:46,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:46,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509575336] [2023-12-05 21:04:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:46,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:46,660 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 21:04:46,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:46,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509575336] [2023-12-05 21:04:46,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509575336] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:46,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:46,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:46,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280236691] [2023-12-05 21:04:46,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:46,661 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:46,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:46,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:46,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:46,662 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 178 [2023-12-05 21:04:46,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 113 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:46,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:46,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 178 [2023-12-05 21:04:46,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:48,071 INFO L124 PetriNetUnfolderBase]: 6701/13292 cut-off events. [2023-12-05 21:04:48,071 INFO L125 PetriNetUnfolderBase]: For 1216/1956 co-relation queries the response was YES. [2023-12-05 21:04:48,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32012 conditions, 13292 events. 6701/13292 cut-off events. For 1216/1956 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 122631 event pairs, 5549 based on Foata normal form. 0/7796 useless extension candidates. Maximal degree in co-relation 31971. Up to 9208 conditions per place. [2023-12-05 21:04:48,169 INFO L140 encePairwiseOnDemand]: 175/178 looper letters, 39 selfloop transitions, 1 changer transitions 0/111 dead transitions. [2023-12-05 21:04:48,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 111 transitions, 397 flow [2023-12-05 21:04:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-12-05 21:04:48,170 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2023-12-05 21:04:48,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-12-05 21:04:48,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-12-05 21:04:48,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:48,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-12-05 21:04:48,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:48,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:48,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:48,174 INFO L308 CegarLoopForPetriNet]: 152 programPoint places, -32 predicate places. [2023-12-05 21:04:48,174 INFO L500 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 397 flow [2023-12-05 21:04:48,174 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:48,174 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:48,174 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:48,174 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:04:48,174 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-12-05 21:04:48,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:48,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1045331801, now seen corresponding path program 1 times [2023-12-05 21:04:48,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:48,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857289430] [2023-12-05 21:04:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:48,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:48,254 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 21:04:48,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:48,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857289430] [2023-12-05 21:04:48,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857289430] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:48,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:48,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:48,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532203761] [2023-12-05 21:04:48,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:48,255 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:48,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:48,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:48,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:48,256 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 178 [2023-12-05 21:04:48,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 397 flow. Second operand has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:48,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:48,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 178 [2023-12-05 21:04:48,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:48,861 INFO L124 PetriNetUnfolderBase]: 2236/5193 cut-off events. [2023-12-05 21:04:48,861 INFO L125 PetriNetUnfolderBase]: For 1300/1932 co-relation queries the response was YES. [2023-12-05 21:04:48,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14714 conditions, 5193 events. 2236/5193 cut-off events. For 1300/1932 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 44149 event pairs, 1843 based on Foata normal form. 0/3744 useless extension candidates. Maximal degree in co-relation 14662. Up to 3120 conditions per place. [2023-12-05 21:04:48,913 INFO L140 encePairwiseOnDemand]: 166/178 looper letters, 31 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-12-05 21:04:48,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 101 transitions, 403 flow [2023-12-05 21:04:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:04:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:04:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 383 transitions. [2023-12-05 21:04:48,914 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5379213483146067 [2023-12-05 21:04:48,915 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 383 transitions. [2023-12-05 21:04:48,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 383 transitions. [2023-12-05 21:04:48,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:48,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 383 transitions. [2023-12-05 21:04:48,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:48,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:48,917 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:48,918 INFO L308 CegarLoopForPetriNet]: 152 programPoint places, -39 predicate places. [2023-12-05 21:04:48,918 INFO L500 AbstractCegarLoop]: Abstraction has has 113 places, 101 transitions, 403 flow [2023-12-05 21:04:48,918 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:48,918 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:48,919 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:48,919 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:04:48,919 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-12-05 21:04:48,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:48,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1045331802, now seen corresponding path program 1 times [2023-12-05 21:04:48,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:48,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750943036] [2023-12-05 21:04:48,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:48,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:49,039 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 21:04:49,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:49,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750943036] [2023-12-05 21:04:49,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750943036] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:49,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:49,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:49,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172353033] [2023-12-05 21:04:49,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:49,040 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:49,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:49,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:49,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:49,042 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 178 [2023-12-05 21:04:49,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 101 transitions, 403 flow. Second operand has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:49,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 178 [2023-12-05 21:04:49,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:49,275 INFO L124 PetriNetUnfolderBase]: 387/1334 cut-off events. [2023-12-05 21:04:49,276 INFO L125 PetriNetUnfolderBase]: For 896/1172 co-relation queries the response was YES. [2023-12-05 21:04:49,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3666 conditions, 1334 events. 387/1334 cut-off events. For 896/1172 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 9075 event pairs, 313 based on Foata normal form. 0/1280 useless extension candidates. Maximal degree in co-relation 3603. Up to 565 conditions per place. [2023-12-05 21:04:49,286 INFO L140 encePairwiseOnDemand]: 165/178 looper letters, 20 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-12-05 21:04:49,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 91 transitions, 369 flow [2023-12-05 21:04:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:04:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:04:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2023-12-05 21:04:49,291 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5146067415730337 [2023-12-05 21:04:49,291 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2023-12-05 21:04:49,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2023-12-05 21:04:49,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:49,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2023-12-05 21:04:49,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 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 21:04:49,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,298 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,299 INFO L308 CegarLoopForPetriNet]: 152 programPoint places, -45 predicate places. [2023-12-05 21:04:49,300 INFO L500 AbstractCegarLoop]: Abstraction has has 107 places, 91 transitions, 369 flow [2023-12-05 21:04:49,300 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,300 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:49,301 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:49,301 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:04:49,301 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2023-12-05 21:04:49,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2061424294, now seen corresponding path program 1 times [2023-12-05 21:04:49,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:49,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270933725] [2023-12-05 21:04:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:49,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:49,314 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:04:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:04:49,330 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:04:49,330 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:04:49,331 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (77 of 78 remaining) [2023-12-05 21:04:49,331 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 78 remaining) [2023-12-05 21:04:49,331 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 78 remaining) [2023-12-05 21:04:49,331 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 78 remaining) [2023-12-05 21:04:49,331 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 78 remaining) [2023-12-05 21:04:49,331 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 78 remaining) [2023-12-05 21:04:49,331 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 78 remaining) [2023-12-05 21:04:49,331 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 78 remaining) [2023-12-05 21:04:49,332 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 78 remaining) [2023-12-05 21:04:49,333 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 78 remaining) [2023-12-05 21:04:49,334 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 78 remaining) [2023-12-05 21:04:49,335 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 78 remaining) [2023-12-05 21:04:49,336 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 78 remaining) [2023-12-05 21:04:49,336 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 78 remaining) [2023-12-05 21:04:49,336 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 78 remaining) [2023-12-05 21:04:49,336 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 78 remaining) [2023-12-05 21:04:49,336 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 78 remaining) [2023-12-05 21:04:49,336 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 78 remaining) [2023-12-05 21:04:49,336 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 78 remaining) [2023-12-05 21:04:49,336 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 78 remaining) [2023-12-05 21:04:49,336 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 78 remaining) [2023-12-05 21:04:49,337 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 78 remaining) [2023-12-05 21:04:49,337 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 78 remaining) [2023-12-05 21:04:49,338 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 78 remaining) [2023-12-05 21:04:49,339 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 78 remaining) [2023-12-05 21:04:49,339 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 78 remaining) [2023-12-05 21:04:49,339 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 78 remaining) [2023-12-05 21:04:49,339 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 78 remaining) [2023-12-05 21:04:49,339 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 78 remaining) [2023-12-05 21:04:49,339 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 78 remaining) [2023-12-05 21:04:49,339 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 78 remaining) [2023-12-05 21:04:49,339 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:04:49,340 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:04:49,340 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:04:49,340 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:04:49,403 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:04:49,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 248 transitions, 532 flow [2023-12-05 21:04:49,427 INFO L124 PetriNetUnfolderBase]: 11/238 cut-off events. [2023-12-05 21:04:49,427 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:04:49,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 238 events. 11/238 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 842 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 249. Up to 8 conditions per place. [2023-12-05 21:04:49,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 248 transitions, 532 flow [2023-12-05 21:04:49,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 195 transitions, 411 flow [2023-12-05 21:04:49,434 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:04:49,434 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;@359a73f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:04:49,434 INFO L363 AbstractCegarLoop]: Starting to check reachability of 102 error locations. [2023-12-05 21:04:49,435 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:04:49,435 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-12-05 21:04:49,435 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:04:49,435 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:49,435 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:49,435 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-12-05 21:04:49,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash 729842505, now seen corresponding path program 1 times [2023-12-05 21:04:49,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:49,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144133561] [2023-12-05 21:04:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:49,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:49,455 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 21:04:49,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:49,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144133561] [2023-12-05 21:04:49,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144133561] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:49,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:49,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:49,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199323709] [2023-12-05 21:04:49,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:49,457 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:49,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:49,457 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 248 [2023-12-05 21:04:49,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 195 transitions, 411 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:49,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 248 [2023-12-05 21:04:49,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:05:22,225 INFO L124 PetriNetUnfolderBase]: 183845/305816 cut-off events. [2023-12-05 21:05:22,225 INFO L125 PetriNetUnfolderBase]: For 13453/13453 co-relation queries the response was YES. [2023-12-05 21:05:23,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544276 conditions, 305816 events. 183845/305816 cut-off events. For 13453/13453 co-relation queries the response was YES. Maximal size of possible extension queue 13167. Compared 3416329 event pairs, 162028 based on Foata normal form. 44901/196417 useless extension candidates. Maximal degree in co-relation 544240. Up to 233428 conditions per place. [2023-12-05 21:05:26,424 INFO L140 encePairwiseOnDemand]: 211/248 looper letters, 55 selfloop transitions, 1 changer transitions 0/149 dead transitions. [2023-12-05 21:05:26,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 431 flow [2023-12-05 21:05:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:05:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:05:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-12-05 21:05:26,426 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6075268817204301 [2023-12-05 21:05:26,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-12-05 21:05:26,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-12-05 21:05:26,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:05:26,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-12-05 21:05:26,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:05:26,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:05:26,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:05:26,429 INFO L308 CegarLoopForPetriNet]: 197 programPoint places, -40 predicate places. [2023-12-05 21:05:26,429 INFO L500 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 431 flow [2023-12-05 21:05:26,430 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:05:26,430 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:05:26,430 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:05:26,430 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:05:26,430 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 99 more)] === [2023-12-05 21:05:26,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:05:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash 729842506, now seen corresponding path program 1 times [2023-12-05 21:05:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:05:26,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703737423] [2023-12-05 21:05:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:05:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:05:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:05:26,453 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 21:05:26,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:05:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703737423] [2023-12-05 21:05:26,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703737423] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:05:26,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:05:26,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:05:26,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288499880] [2023-12-05 21:05:26,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:05:26,454 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:05:26,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:05:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:05:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:05:26,455 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 248 [2023-12-05 21:05:26,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 431 flow. Second operand has 3 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 21:05:26,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:05:26,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 248 [2023-12-05 21:05:26,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand