/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/goblint-regression/28-race_reach_72-funloop_hard_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:17:03,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:17:03,960 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 21:17:03,987 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:17:03,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:17:03,988 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:17:03,989 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:17:03,989 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:17:03,989 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:17:03,992 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:17:03,992 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:17:03,993 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:17:03,993 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:17:03,994 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:17:03,994 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:17:03,994 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:17:03,994 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:17:03,994 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:17:03,994 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:17:03,994 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:17:03,995 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:17:03,995 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:17:03,995 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:17:03,996 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:17:03,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:17:03,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:03,997 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:17:03,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:17:03,997 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:17:03,997 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:17:03,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:17:03,998 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:17:03,998 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:17:03,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:17:04,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:17:04,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:17:04,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:17:04,200 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:17:04,201 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:17:04,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-12-05 21:17:05,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:17:05,456 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:17:05,456 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-12-05 21:17:05,474 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd4e3ff2/5f394f48dc2a43c6868c39ed1284d8c1/FLAGef86ed32c [2023-12-05 21:17:05,488 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd4e3ff2/5f394f48dc2a43c6868c39ed1284d8c1 [2023-12-05 21:17:05,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:17:05,491 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:17:05,494 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:05,494 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:17:05,497 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:17:05,497 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:05,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c3c6cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05, skipping insertion in model container [2023-12-05 21:17:05,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:05,534 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:17:05,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:05,879 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:17:05,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:05,979 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:17:05,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05 WrapperNode [2023-12-05 21:17:05,979 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:05,980 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:05,980 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:17:05,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:17:05,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,015 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,038 INFO L138 Inliner]: procedures = 272, calls = 50, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 297 [2023-12-05 21:17:06,038 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:06,039 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:17:06,039 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:17:06,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:17:06,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,056 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,083 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,085 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:17:06,086 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:17:06,086 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:17:06,086 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:17:06,087 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (1/1) ... [2023-12-05 21:17:06,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:06,116 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 21:17:06,139 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 21:17:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:17:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:17:06,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:17:06,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:17:06,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:17:06,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:17:06,150 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 21:17:06,280 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:17:06,282 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:17:06,660 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:17:06,691 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:17:06,691 INFO L309 CfgBuilder]: Removed 35 assume(true) statements. [2023-12-05 21:17:06,692 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:06 BoogieIcfgContainer [2023-12-05 21:17:06,692 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:17:06,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:17:06,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:17:06,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:17:06,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:17:05" (1/3) ... [2023-12-05 21:17:06,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2492dd94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:06, skipping insertion in model container [2023-12-05 21:17:06,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:05" (2/3) ... [2023-12-05 21:17:06,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2492dd94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:06, skipping insertion in model container [2023-12-05 21:17:06,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:06" (3/3) ... [2023-12-05 21:17:06,698 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-12-05 21:17:06,710 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:17:06,710 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-12-05 21:17:06,710 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:17:06,772 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-05 21:17:06,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 315 transitions, 637 flow [2023-12-05 21:17:06,911 INFO L124 PetriNetUnfolderBase]: 78/498 cut-off events. [2023-12-05 21:17:06,912 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-05 21:17:06,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 498 events. 78/498 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2680 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 278. Up to 8 conditions per place. [2023-12-05 21:17:06,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 315 transitions, 637 flow [2023-12-05 21:17:06,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 315 transitions, 637 flow [2023-12-05 21:17:06,944 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:06,948 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;@4ce6516e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:06,948 INFO L363 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-12-05 21:17:06,952 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:06,952 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2023-12-05 21:17:06,952 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:06,952 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:06,953 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:06,953 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:06,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:06,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1183181732, now seen corresponding path program 1 times [2023-12-05 21:17:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:06,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503034822] [2023-12-05 21:17:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:06,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:07,180 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 21:17:07,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:07,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503034822] [2023-12-05 21:17:07,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503034822] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:07,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:07,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:07,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088700587] [2023-12-05 21:17:07,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:07,188 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:07,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:07,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:07,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:07,213 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 315 [2023-12-05 21:17:07,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 315 transitions, 637 flow. Second operand has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 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 21:17:07,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:07,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 315 [2023-12-05 21:17:07,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:07,481 INFO L124 PetriNetUnfolderBase]: 181/1780 cut-off events. [2023-12-05 21:17:07,482 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:17:07,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2133 conditions, 1780 events. 181/1780 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 15291 event pairs, 136 based on Foata normal form. 405/1883 useless extension candidates. Maximal degree in co-relation 1903. Up to 343 conditions per place. [2023-12-05 21:17:07,497 INFO L140 encePairwiseOnDemand]: 271/315 looper letters, 37 selfloop transitions, 2 changer transitions 0/269 dead transitions. [2023-12-05 21:17:07,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 269 transitions, 623 flow [2023-12-05 21:17:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 790 transitions. [2023-12-05 21:17:07,512 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8359788359788359 [2023-12-05 21:17:07,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 790 transitions. [2023-12-05 21:17:07,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 790 transitions. [2023-12-05 21:17:07,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:07,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 790 transitions. [2023-12-05 21:17:07,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,534 INFO L308 CegarLoopForPetriNet]: 270 programPoint places, -7 predicate places. [2023-12-05 21:17:07,534 INFO L500 AbstractCegarLoop]: Abstraction has has 263 places, 269 transitions, 623 flow [2023-12-05 21:17:07,535 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 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 21:17:07,535 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:07,535 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:07,535 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:17:07,535 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:07,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1492259173, now seen corresponding path program 1 times [2023-12-05 21:17:07,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:07,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594089517] [2023-12-05 21:17:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:07,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594089517] [2023-12-05 21:17:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594089517] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:07,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533444811] [2023-12-05 21:17:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:07,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:07,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:07,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:17:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:07,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:07,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:07,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533444811] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:07,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:07,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324064746] [2023-12-05 21:17:07,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:07,842 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:07,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:07,845 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 315 [2023-12-05 21:17:07,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 269 transitions, 623 flow. Second operand has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:07,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 315 [2023-12-05 21:17:07,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:08,127 INFO L124 PetriNetUnfolderBase]: 181/1787 cut-off events. [2023-12-05 21:17:08,128 INFO L125 PetriNetUnfolderBase]: For 199/209 co-relation queries the response was YES. [2023-12-05 21:17:08,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2500 conditions, 1787 events. 181/1787 cut-off events. For 199/209 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 15305 event pairs, 136 based on Foata normal form. 0/1485 useless extension candidates. Maximal degree in co-relation 2217. Up to 348 conditions per place. [2023-12-05 21:17:08,138 INFO L140 encePairwiseOnDemand]: 309/315 looper letters, 38 selfloop transitions, 9 changer transitions 0/276 dead transitions. [2023-12-05 21:17:08,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 276 transitions, 741 flow [2023-12-05 21:17:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2164 transitions. [2023-12-05 21:17:08,142 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.76331569664903 [2023-12-05 21:17:08,142 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2164 transitions. [2023-12-05 21:17:08,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2164 transitions. [2023-12-05 21:17:08,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:08,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2164 transitions. [2023-12-05 21:17:08,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 240.44444444444446) internal successors, (2164), 9 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 315.0) internal successors, (3150), 10 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,152 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 315.0) internal successors, (3150), 10 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,152 INFO L308 CegarLoopForPetriNet]: 270 programPoint places, 1 predicate places. [2023-12-05 21:17:08,153 INFO L500 AbstractCegarLoop]: Abstraction has has 271 places, 276 transitions, 741 flow [2023-12-05 21:17:08,154 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 237.1) internal successors, (2371), 10 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,154 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:08,155 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:08,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-05 21:17:08,359 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:08,362 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:08,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash -860497979, now seen corresponding path program 2 times [2023-12-05 21:17:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:08,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731355096] [2023-12-05 21:17:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:08,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:08,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:08,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731355096] [2023-12-05 21:17:08,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731355096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:08,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:08,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:08,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758718360] [2023-12-05 21:17:08,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:08,421 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:08,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:08,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:08,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:08,422 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 315 [2023-12-05 21:17:08,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 276 transitions, 741 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:08,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 315 [2023-12-05 21:17:08,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:08,856 INFO L124 PetriNetUnfolderBase]: 868/4170 cut-off events. [2023-12-05 21:17:08,856 INFO L125 PetriNetUnfolderBase]: For 1777/1793 co-relation queries the response was YES. [2023-12-05 21:17:08,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7397 conditions, 4170 events. 868/4170 cut-off events. For 1777/1793 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 43124 event pairs, 720 based on Foata normal form. 0/3568 useless extension candidates. Maximal degree in co-relation 7062. Up to 1582 conditions per place. [2023-12-05 21:17:08,875 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 86 selfloop transitions, 2 changer transitions 0/292 dead transitions. [2023-12-05 21:17:08,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 292 transitions, 981 flow [2023-12-05 21:17:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2023-12-05 21:17:08,877 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.726984126984127 [2023-12-05 21:17:08,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2023-12-05 21:17:08,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2023-12-05 21:17:08,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:08,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2023-12-05 21:17:08,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,881 INFO L308 CegarLoopForPetriNet]: 270 programPoint places, 1 predicate places. [2023-12-05 21:17:08,881 INFO L500 AbstractCegarLoop]: Abstraction has has 271 places, 292 transitions, 981 flow [2023-12-05 21:17:08,881 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,881 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:08,881 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:08,881 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:17:08,882 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:08,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash -860497978, now seen corresponding path program 1 times [2023-12-05 21:17:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:08,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541421102] [2023-12-05 21:17:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:08,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:08,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:08,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541421102] [2023-12-05 21:17:08,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541421102] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:09,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430473342] [2023-12-05 21:17:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:09,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:09,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:09,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:09,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:17:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:09,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:09,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:09,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:09,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430473342] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:09,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:09,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:09,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939653194] [2023-12-05 21:17:09,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:09,236 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:09,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:09,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:09,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:09,240 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 315 [2023-12-05 21:17:09,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 292 transitions, 981 flow. Second operand has 18 states, 18 states have (on average 237.27777777777777) internal successors, (4271), 18 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:09,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 315 [2023-12-05 21:17:09,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:09,816 INFO L124 PetriNetUnfolderBase]: 868/4190 cut-off events. [2023-12-05 21:17:09,816 INFO L125 PetriNetUnfolderBase]: For 3547/3571 co-relation queries the response was YES. [2023-12-05 21:17:09,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8232 conditions, 4190 events. 868/4190 cut-off events. For 3547/3571 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 43077 event pairs, 720 based on Foata normal form. 0/3588 useless extension candidates. Maximal degree in co-relation 7780. Up to 1582 conditions per place. [2023-12-05 21:17:09,834 INFO L140 encePairwiseOnDemand]: 309/315 looper letters, 54 selfloop transitions, 21 changer transitions 0/312 dead transitions. [2023-12-05 21:17:09,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 312 transitions, 1243 flow [2023-12-05 21:17:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5006 transitions. [2023-12-05 21:17:09,842 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7567649281934996 [2023-12-05 21:17:09,842 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5006 transitions. [2023-12-05 21:17:09,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5006 transitions. [2023-12-05 21:17:09,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:09,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5006 transitions. [2023-12-05 21:17:09,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 238.38095238095238) internal successors, (5006), 21 states have internal predecessors, (5006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 315.0) internal successors, (6930), 22 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,862 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 315.0) internal successors, (6930), 22 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,863 INFO L308 CegarLoopForPetriNet]: 270 programPoint places, 21 predicate places. [2023-12-05 21:17:09,863 INFO L500 AbstractCegarLoop]: Abstraction has has 291 places, 312 transitions, 1243 flow [2023-12-05 21:17:09,865 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 237.27777777777777) internal successors, (4271), 18 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,865 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:09,866 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:09,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:10,070 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-05 21:17:10,071 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:10,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1547566214, now seen corresponding path program 2 times [2023-12-05 21:17:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:10,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008901118] [2023-12-05 21:17:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:10,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:10,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008901118] [2023-12-05 21:17:10,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008901118] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:10,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:10,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:10,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447426000] [2023-12-05 21:17:10,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:10,185 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:10,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:17:10,186 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 315 [2023-12-05 21:17:10,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 312 transitions, 1243 flow. Second operand has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:10,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 315 [2023-12-05 21:17:10,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:10,723 INFO L124 PetriNetUnfolderBase]: 1269/4479 cut-off events. [2023-12-05 21:17:10,723 INFO L125 PetriNetUnfolderBase]: For 7339/7414 co-relation queries the response was YES. [2023-12-05 21:17:10,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11390 conditions, 4479 events. 1269/4479 cut-off events. For 7339/7414 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 45229 event pairs, 218 based on Foata normal form. 0/4191 useless extension candidates. Maximal degree in co-relation 11127. Up to 1955 conditions per place. [2023-12-05 21:17:10,759 INFO L140 encePairwiseOnDemand]: 309/315 looper letters, 122 selfloop transitions, 4 changer transitions 0/350 dead transitions. [2023-12-05 21:17:10,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 350 transitions, 1721 flow [2023-12-05 21:17:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:17:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:17:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 891 transitions. [2023-12-05 21:17:10,763 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7071428571428572 [2023-12-05 21:17:10,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 891 transitions. [2023-12-05 21:17:10,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 891 transitions. [2023-12-05 21:17:10,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:10,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 891 transitions. [2023-12-05 21:17:10,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,768 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,768 INFO L308 CegarLoopForPetriNet]: 270 programPoint places, 24 predicate places. [2023-12-05 21:17:10,768 INFO L500 AbstractCegarLoop]: Abstraction has has 294 places, 350 transitions, 1721 flow [2023-12-05 21:17:10,769 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,769 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:10,769 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:10,769 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:17:10,769 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:10,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash -577023331, now seen corresponding path program 1 times [2023-12-05 21:17:10,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:10,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288927757] [2023-12-05 21:17:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:10,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:10,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288927757] [2023-12-05 21:17:10,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288927757] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:10,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737657864] [2023-12-05 21:17:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:10,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:10,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:10,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:11,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-05 21:17:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:11,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:17:11,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:11,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:11,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737657864] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:11,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:11,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:17:11,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54712378] [2023-12-05 21:17:11,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:11,287 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:17:11,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:11,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:17:11,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:17:11,291 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 315 [2023-12-05 21:17:11,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 350 transitions, 1721 flow. Second operand has 23 states, 23 states have (on average 237.47826086956522) internal successors, (5462), 23 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:11,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:11,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 315 [2023-12-05 21:17:11,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:12,112 INFO L124 PetriNetUnfolderBase]: 1328/4587 cut-off events. [2023-12-05 21:17:12,112 INFO L125 PetriNetUnfolderBase]: For 11485/11751 co-relation queries the response was YES. [2023-12-05 21:17:12,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12833 conditions, 4587 events. 1328/4587 cut-off events. For 11485/11751 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 45494 event pairs, 1127 based on Foata normal form. 0/4268 useless extension candidates. Maximal degree in co-relation 12446. Up to 2011 conditions per place. [2023-12-05 21:17:12,135 INFO L140 encePairwiseOnDemand]: 309/315 looper letters, 76 selfloop transitions, 30 changer transitions 0/365 dead transitions. [2023-12-05 21:17:12,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 365 transitions, 2047 flow [2023-12-05 21:17:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:17:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:17:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7135 transitions. [2023-12-05 21:17:12,147 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.755026455026455 [2023-12-05 21:17:12,147 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7135 transitions. [2023-12-05 21:17:12,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7135 transitions. [2023-12-05 21:17:12,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:12,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7135 transitions. [2023-12-05 21:17:12,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 237.83333333333334) internal successors, (7135), 30 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 315.0) internal successors, (9765), 31 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,174 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 315.0) internal successors, (9765), 31 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,175 INFO L308 CegarLoopForPetriNet]: 270 programPoint places, 53 predicate places. [2023-12-05 21:17:12,175 INFO L500 AbstractCegarLoop]: Abstraction has has 323 places, 365 transitions, 2047 flow [2023-12-05 21:17:12,176 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 237.47826086956522) internal successors, (5462), 23 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,176 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:12,176 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:12,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:12,384 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:12,385 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:12,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1898546644, now seen corresponding path program 2 times [2023-12-05 21:17:12,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:12,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927792994] [2023-12-05 21:17:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:12,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:12,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927792994] [2023-12-05 21:17:12,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927792994] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:12,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277770785] [2023-12-05 21:17:12,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:12,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:12,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:12,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-05 21:17:12,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:17:12,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:12,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:17:12,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:12,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:17:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:12,692 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:12,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277770785] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:12,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:12,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:17:12,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939777717] [2023-12-05 21:17:12,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:12,693 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:17:12,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:12,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:17:12,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:17:12,694 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 315 [2023-12-05 21:17:12,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 365 transitions, 2047 flow. Second operand has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:12,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 315 [2023-12-05 21:17:12,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:13,454 INFO L124 PetriNetUnfolderBase]: 1328/4730 cut-off events. [2023-12-05 21:17:13,454 INFO L125 PetriNetUnfolderBase]: For 15738/16048 co-relation queries the response was YES. [2023-12-05 21:17:13,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15104 conditions, 4730 events. 1328/4730 cut-off events. For 15738/16048 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 47152 event pairs, 231 based on Foata normal form. 5/4449 useless extension candidates. Maximal degree in co-relation 14717. Up to 1987 conditions per place. [2023-12-05 21:17:13,484 INFO L140 encePairwiseOnDemand]: 306/315 looper letters, 190 selfloop transitions, 8 changer transitions 0/436 dead transitions. [2023-12-05 21:17:13,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 436 transitions, 3085 flow [2023-12-05 21:17:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:17:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:17:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1730 transitions. [2023-12-05 21:17:13,490 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2023-12-05 21:17:13,490 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1730 transitions. [2023-12-05 21:17:13,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1730 transitions. [2023-12-05 21:17:13,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:13,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1730 transitions. [2023-12-05 21:17:13,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 216.25) internal successors, (1730), 8 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,496 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,498 INFO L308 CegarLoopForPetriNet]: 270 programPoint places, 59 predicate places. [2023-12-05 21:17:13,498 INFO L500 AbstractCegarLoop]: Abstraction has has 329 places, 436 transitions, 3085 flow [2023-12-05 21:17:13,499 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.14285714285714) internal successors, (1366), 7 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,499 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:13,499 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:13,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:13,704 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:13,704 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:13,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:13,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1274595235, now seen corresponding path program 1 times [2023-12-05 21:17:13,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:13,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809427653] [2023-12-05 21:17:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:13,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:13,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:17:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:13,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:17:13,756 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:17:13,756 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2023-12-05 21:17:13,761 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 45 remaining) [2023-12-05 21:17:13,761 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 45 remaining) [2023-12-05 21:17:13,761 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 45 remaining) [2023-12-05 21:17:13,761 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 45 remaining) [2023-12-05 21:17:13,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 45 remaining) [2023-12-05 21:17:13,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 45 remaining) [2023-12-05 21:17:13,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 45 remaining) [2023-12-05 21:17:13,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 45 remaining) [2023-12-05 21:17:13,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 45 remaining) [2023-12-05 21:17:13,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 45 remaining) [2023-12-05 21:17:13,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 45 remaining) [2023-12-05 21:17:13,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 45 remaining) [2023-12-05 21:17:13,763 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 45 remaining) [2023-12-05 21:17:13,764 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 45 remaining) [2023-12-05 21:17:13,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 45 remaining) [2023-12-05 21:17:13,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 45 remaining) [2023-12-05 21:17:13,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 45 remaining) [2023-12-05 21:17:13,766 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 45 remaining) [2023-12-05 21:17:13,767 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 45 remaining) [2023-12-05 21:17:13,769 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 45 remaining) [2023-12-05 21:17:13,769 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 45 remaining) [2023-12-05 21:17:13,769 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 45 remaining) [2023-12-05 21:17:13,769 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 45 remaining) [2023-12-05 21:17:13,769 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 45 remaining) [2023-12-05 21:17:13,769 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 45 remaining) [2023-12-05 21:17:13,770 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 45 remaining) [2023-12-05 21:17:13,771 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:17:13,771 INFO L457 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2023-12-05 21:17:13,773 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:17:13,773 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:17:13,807 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:17:13,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 407 transitions, 830 flow [2023-12-05 21:17:13,889 INFO L124 PetriNetUnfolderBase]: 126/801 cut-off events. [2023-12-05 21:17:13,889 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-05 21:17:13,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 801 events. 126/801 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4787 event pairs, 0 based on Foata normal form. 0/577 useless extension candidates. Maximal degree in co-relation 500. Up to 12 conditions per place. [2023-12-05 21:17:13,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 348 places, 407 transitions, 830 flow [2023-12-05 21:17:13,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 348 places, 407 transitions, 830 flow [2023-12-05 21:17:13,911 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:13,911 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;@4ce6516e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:13,911 INFO L363 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-12-05 21:17:13,913 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:13,913 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2023-12-05 21:17:13,913 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:13,913 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:13,913 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:13,913 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:13,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:13,914 INFO L85 PathProgramCache]: Analyzing trace with hash 775287964, now seen corresponding path program 1 times [2023-12-05 21:17:13,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:13,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470085121] [2023-12-05 21:17:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:13,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:13,933 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 21:17:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470085121] [2023-12-05 21:17:13,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470085121] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:13,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:13,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:13,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611164561] [2023-12-05 21:17:13,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:13,934 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:13,937 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 407 [2023-12-05 21:17:13,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 407 transitions, 830 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:13,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 407 [2023-12-05 21:17:13,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:15,580 INFO L124 PetriNetUnfolderBase]: 3251/17836 cut-off events. [2023-12-05 21:17:15,580 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2023-12-05 21:17:15,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22622 conditions, 17836 events. 3251/17836 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 237119 event pairs, 2680 based on Foata normal form. 5683/20756 useless extension candidates. Maximal degree in co-relation 20308. Up to 4710 conditions per place. [2023-12-05 21:17:15,716 INFO L140 encePairwiseOnDemand]: 350/407 looper letters, 47 selfloop transitions, 2 changer transitions 0/345 dead transitions. [2023-12-05 21:17:15,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 345 transitions, 804 flow [2023-12-05 21:17:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1017 transitions. [2023-12-05 21:17:15,718 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8329238329238329 [2023-12-05 21:17:15,718 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1017 transitions. [2023-12-05 21:17:15,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1017 transitions. [2023-12-05 21:17:15,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:15,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1017 transitions. [2023-12-05 21:17:15,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,722 INFO L308 CegarLoopForPetriNet]: 348 programPoint places, -10 predicate places. [2023-12-05 21:17:15,722 INFO L500 AbstractCegarLoop]: Abstraction has has 338 places, 345 transitions, 804 flow [2023-12-05 21:17:15,722 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,723 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:15,723 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:15,723 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:17:15,723 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:15,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1660871932, now seen corresponding path program 1 times [2023-12-05 21:17:15,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:15,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084089129] [2023-12-05 21:17:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:15,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:15,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:15,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084089129] [2023-12-05 21:17:15,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084089129] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:15,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166912140] [2023-12-05 21:17:15,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:15,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:15,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:15,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:15,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-05 21:17:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:15,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:15,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:15,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:15,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166912140] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:15,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:15,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:15,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200297428] [2023-12-05 21:17:15,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:15,864 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:15,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:15,866 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 407 [2023-12-05 21:17:15,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 345 transitions, 804 flow. Second operand has 10 states, 10 states have (on average 305.1) internal successors, (3051), 10 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:15,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 407 [2023-12-05 21:17:15,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:17,689 INFO L124 PetriNetUnfolderBase]: 3251/17843 cut-off events. [2023-12-05 21:17:17,689 INFO L125 PetriNetUnfolderBase]: For 1920/2036 co-relation queries the response was YES. [2023-12-05 21:17:17,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27356 conditions, 17843 events. 3251/17843 cut-off events. For 1920/2036 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 236876 event pairs, 2680 based on Foata normal form. 0/15080 useless extension candidates. Maximal degree in co-relation 24637. Up to 4715 conditions per place. [2023-12-05 21:17:17,871 INFO L140 encePairwiseOnDemand]: 401/407 looper letters, 48 selfloop transitions, 9 changer transitions 0/352 dead transitions. [2023-12-05 21:17:17,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 352 transitions, 942 flow [2023-12-05 21:17:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2786 transitions. [2023-12-05 21:17:17,876 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7605787605787606 [2023-12-05 21:17:17,876 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2786 transitions. [2023-12-05 21:17:17,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2786 transitions. [2023-12-05 21:17:17,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:17,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2786 transitions. [2023-12-05 21:17:17,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 309.55555555555554) internal successors, (2786), 9 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:17,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 407.0) internal successors, (4070), 10 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:17,887 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 407.0) internal successors, (4070), 10 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:17,887 INFO L308 CegarLoopForPetriNet]: 348 programPoint places, -2 predicate places. [2023-12-05 21:17:17,887 INFO L500 AbstractCegarLoop]: Abstraction has has 346 places, 352 transitions, 942 flow [2023-12-05 21:17:17,888 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 305.1) internal successors, (3051), 10 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:17,888 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:17,888 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:17,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:18,094 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-05 21:17:18,094 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:18,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash 842868988, now seen corresponding path program 2 times [2023-12-05 21:17:18,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:18,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954747324] [2023-12-05 21:17:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:18,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:18,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:18,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954747324] [2023-12-05 21:17:18,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954747324] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:18,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:18,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:18,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752329584] [2023-12-05 21:17:18,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:18,141 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:18,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:18,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:18,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:18,142 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 407 [2023-12-05 21:17:18,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 352 transitions, 942 flow. Second operand has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:18,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 407 [2023-12-05 21:17:18,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:27,746 INFO L124 PetriNetUnfolderBase]: 33358/96295 cut-off events. [2023-12-05 21:17:27,746 INFO L125 PetriNetUnfolderBase]: For 47826/48207 co-relation queries the response was YES. [2023-12-05 21:17:28,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189999 conditions, 96295 events. 33358/96295 cut-off events. For 47826/48207 co-relation queries the response was YES. Maximal size of possible extension queue 3176. Compared 1404841 event pairs, 28494 based on Foata normal form. 0/80309 useless extension candidates. Maximal degree in co-relation 13790. Up to 45852 conditions per place. [2023-12-05 21:17:28,577 INFO L140 encePairwiseOnDemand]: 403/407 looper letters, 124 selfloop transitions, 2 changer transitions 0/386 dead transitions. [2023-12-05 21:17:28,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 386 transitions, 1326 flow [2023-12-05 21:17:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 899 transitions. [2023-12-05 21:17:28,579 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7362817362817363 [2023-12-05 21:17:28,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 899 transitions. [2023-12-05 21:17:28,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 899 transitions. [2023-12-05 21:17:28,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:28,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 899 transitions. [2023-12-05 21:17:28,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,583 INFO L308 CegarLoopForPetriNet]: 348 programPoint places, -2 predicate places. [2023-12-05 21:17:28,583 INFO L500 AbstractCegarLoop]: Abstraction has has 346 places, 386 transitions, 1326 flow [2023-12-05 21:17:28,583 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,583 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:28,583 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:28,584 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:17:28,584 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:28,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash 842868989, now seen corresponding path program 1 times [2023-12-05 21:17:28,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:28,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598960190] [2023-12-05 21:17:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:28,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:28,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598960190] [2023-12-05 21:17:28,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598960190] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:28,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320673925] [2023-12-05 21:17:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:28,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:28,639 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:28,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-05 21:17:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:28,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:28,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320673925] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:28,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:28,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:28,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456358677] [2023-12-05 21:17:28,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:28,799 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:28,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:28,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:28,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:28,802 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 407 [2023-12-05 21:17:28,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 386 transitions, 1326 flow. Second operand has 18 states, 18 states have (on average 305.27777777777777) internal successors, (5495), 18 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:28,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:28,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 407 [2023-12-05 21:17:28,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:39,199 INFO L124 PetriNetUnfolderBase]: 33358/96315 cut-off events. [2023-12-05 21:17:39,199 INFO L125 PetriNetUnfolderBase]: For 95259/95830 co-relation queries the response was YES. [2023-12-05 21:17:39,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212179 conditions, 96315 events. 33358/96315 cut-off events. For 95259/95830 co-relation queries the response was YES. Maximal size of possible extension queue 3177. Compared 1405274 event pairs, 28494 based on Foata normal form. 0/80329 useless extension candidates. Maximal degree in co-relation 16184. Up to 45852 conditions per place. [2023-12-05 21:17:40,009 INFO L140 encePairwiseOnDemand]: 401/407 looper letters, 72 selfloop transitions, 21 changer transitions 0/406 dead transitions. [2023-12-05 21:17:40,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 406 transitions, 1624 flow [2023-12-05 21:17:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6444 transitions. [2023-12-05 21:17:40,017 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7539487539487539 [2023-12-05 21:17:40,017 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6444 transitions. [2023-12-05 21:17:40,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6444 transitions. [2023-12-05 21:17:40,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:40,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6444 transitions. [2023-12-05 21:17:40,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 306.85714285714283) internal successors, (6444), 21 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 407.0) internal successors, (8954), 22 states have internal predecessors, (8954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,035 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 407.0) internal successors, (8954), 22 states have internal predecessors, (8954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,036 INFO L308 CegarLoopForPetriNet]: 348 programPoint places, 18 predicate places. [2023-12-05 21:17:40,036 INFO L500 AbstractCegarLoop]: Abstraction has has 366 places, 406 transitions, 1624 flow [2023-12-05 21:17:40,037 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 305.27777777777777) internal successors, (5495), 18 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,037 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:40,037 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:40,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-05 21:17:40,241 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:40,241 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:17:40,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1326796547, now seen corresponding path program 2 times [2023-12-05 21:17:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:40,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643283423] [2023-12-05 21:17:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:40,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:40,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:40,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643283423] [2023-12-05 21:17:40,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643283423] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:40,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:40,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927835310] [2023-12-05 21:17:40,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:40,311 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:40,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:17:40,312 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 407 [2023-12-05 21:17:40,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 406 transitions, 1624 flow. Second operand has 4 states, 4 states have (on average 254.25) internal successors, (1017), 4 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:40,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:40,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 407 [2023-12-05 21:17:40,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:59,158 INFO L124 PetriNetUnfolderBase]: 62295/140803 cut-off events. [2023-12-05 21:17:59,158 INFO L125 PetriNetUnfolderBase]: For 299534/303365 co-relation queries the response was YES. [2023-12-05 21:17:59,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409080 conditions, 140803 events. 62295/140803 cut-off events. For 299534/303365 co-relation queries the response was YES. Maximal size of possible extension queue 5009. Compared 1912966 event pairs, 56101 based on Foata normal form. 0/129690 useless extension candidates. Maximal degree in co-relation 31372. Up to 75713 conditions per place. [2023-12-05 21:18:00,798 INFO L140 encePairwiseOnDemand]: 401/407 looper letters, 175 selfloop transitions, 4 changer transitions 0/464 dead transitions. [2023-12-05 21:18:00,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 464 transitions, 2322 flow [2023-12-05 21:18:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:18:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:18:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1163 transitions. [2023-12-05 21:18:00,799 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7143734643734644 [2023-12-05 21:18:00,800 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1163 transitions. [2023-12-05 21:18:00,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1163 transitions. [2023-12-05 21:18:00,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:00,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1163 transitions. [2023-12-05 21:18:00,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 290.75) internal successors, (1163), 4 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:00,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:00,803 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:00,803 INFO L308 CegarLoopForPetriNet]: 348 programPoint places, 21 predicate places. [2023-12-05 21:18:00,803 INFO L500 AbstractCegarLoop]: Abstraction has has 369 places, 464 transitions, 2322 flow [2023-12-05 21:18:00,803 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 254.25) internal successors, (1017), 4 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:00,803 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:00,804 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:00,804 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-05 21:18:00,804 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:18:00,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1498984858, now seen corresponding path program 1 times [2023-12-05 21:18:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:00,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012351049] [2023-12-05 21:18:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:00,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:18:00,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:00,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012351049] [2023-12-05 21:18:00,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012351049] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:00,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453658631] [2023-12-05 21:18:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:00,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:00,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:00,967 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:00,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-05 21:18:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:01,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:18:01,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:18:01,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:18:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:18:01,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453658631] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:18:01,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:18:01,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:18:01,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126273210] [2023-12-05 21:18:01,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:18:01,252 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:18:01,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:18:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:18:01,256 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 407 [2023-12-05 21:18:01,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 464 transitions, 2322 flow. Second operand has 23 states, 23 states have (on average 305.4782608695652) internal successors, (7026), 23 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:01,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:01,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 407 [2023-12-05 21:18:01,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand