/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -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_08-cond_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 05:11:59,297 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 05:11:59,360 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 [2023-11-30 05:11:59,385 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 05:11:59,385 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 05:11:59,386 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 05:11:59,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 05:11:59,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 05:11:59,387 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 05:11:59,389 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 05:11:59,390 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 05:11:59,390 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 05:11:59,390 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 05:11:59,391 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 05:11:59,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 05:11:59,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 05:11:59,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 05:11:59,391 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 05:11:59,391 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 05:11:59,391 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 05:11:59,392 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 05:11:59,392 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 05:11:59,392 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 05:11:59,392 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 05:11:59,393 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 05:11:59,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:11:59,393 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 05:11:59,394 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 05:11:59,394 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 05:11:59,394 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 05:11:59,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 05:11:59,395 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 05:11:59,395 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 05:11:59,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 05:11:59,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 05:11:59,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 05:11:59,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 05:11:59,563 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 05:11:59,563 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 05:11:59,564 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-11-30 05:12:00,581 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 05:12:00,806 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 05:12:00,807 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-11-30 05:12:00,818 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fec8d141/041ecf99798144518aa8807dfa698d16/FLAG6933ce74f [2023-11-30 05:12:00,830 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fec8d141/041ecf99798144518aa8807dfa698d16 [2023-11-30 05:12:00,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 05:12:00,833 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 05:12:00,834 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 05:12:00,834 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 05:12:00,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 05:12:00,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:12:00" (1/1) ... [2023-11-30 05:12:00,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43db52f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:00, skipping insertion in model container [2023-11-30 05:12:00,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:12:00" (1/1) ... [2023-11-30 05:12:00,887 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 05:12:01,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:12:01,243 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 05:12:01,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:12:01,365 INFO L206 MainTranslator]: Completed translation [2023-11-30 05:12:01,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01 WrapperNode [2023-11-30 05:12:01,366 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 05:12:01,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 05:12:01,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 05:12:01,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 05:12:01,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,395 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,408 INFO L138 Inliner]: procedures = 271, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 100 [2023-11-30 05:12:01,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 05:12:01,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 05:12:01,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 05:12:01,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 05:12:01,415 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,425 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,425 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,430 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,433 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,434 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,435 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,436 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 05:12:01,437 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 05:12:01,437 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 05:12:01,437 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 05:12:01,438 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (1/1) ... [2023-11-30 05:12:01,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:12:01,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:12:01,464 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) [2023-11-30 05:12:01,472 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 [2023-11-30 05:12:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 05:12:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 05:12:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-30 05:12:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 05:12:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 05:12:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-30 05:12:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 05:12:01,486 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-30 05:12:01,487 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-30 05:12:01,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 05:12:01,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 05:12:01,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 05:12:01,488 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-30 05:12:01,589 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 05:12:01,591 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 05:12:01,769 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 05:12:01,802 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 05:12:01,802 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-30 05:12:01,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:12:01 BoogieIcfgContainer [2023-11-30 05:12:01,804 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 05:12:01,805 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 05:12:01,805 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 05:12:01,807 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 05:12:01,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 05:12:00" (1/3) ... [2023-11-30 05:12:01,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2447d120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:12:01, skipping insertion in model container [2023-11-30 05:12:01,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:12:01" (2/3) ... [2023-11-30 05:12:01,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2447d120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:12:01, skipping insertion in model container [2023-11-30 05:12:01,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:12:01" (3/3) ... [2023-11-30 05:12:01,809 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2023-11-30 05:12:01,825 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 05:12:01,825 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-30 05:12:01,825 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 05:12:01,863 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-30 05:12:01,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 139 transitions, 285 flow [2023-11-30 05:12:01,943 INFO L124 PetriNetUnfolderBase]: 25/196 cut-off events. [2023-11-30 05:12:01,943 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-30 05:12:01,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 196 events. 25/196 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 546 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2023-11-30 05:12:01,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 139 transitions, 285 flow [2023-11-30 05:12:01,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 139 transitions, 285 flow [2023-11-30 05:12:01,970 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:12:01,974 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;@1a473856, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:12:01,975 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:12:01,992 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:12:01,993 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2023-11-30 05:12:01,993 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:12:01,993 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:01,993 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:01,994 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:01,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:01,998 INFO L85 PathProgramCache]: Analyzing trace with hash -399990818, now seen corresponding path program 1 times [2023-11-30 05:12:02,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:02,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80156795] [2023-11-30 05:12:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:02,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:02,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:02,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80156795] [2023-11-30 05:12:02,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80156795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:12:02,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:12:02,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:12:02,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487801363] [2023-11-30 05:12:02,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:12:02,267 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:12:02,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:02,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:12:02,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:12:02,287 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 139 [2023-11-30 05:12:02,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 139 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:02,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 139 [2023-11-30 05:12:02,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:02,411 INFO L124 PetriNetUnfolderBase]: 73/456 cut-off events. [2023-11-30 05:12:02,411 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-30 05:12:02,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 456 events. 73/456 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2671 event pairs, 48 based on Foata normal form. 79/487 useless extension candidates. Maximal degree in co-relation 513. Up to 121 conditions per place. [2023-11-30 05:12:02,414 INFO L140 encePairwiseOnDemand]: 123/139 looper letters, 22 selfloop transitions, 1 changer transitions 17/128 dead transitions. [2023-11-30 05:12:02,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 128 transitions, 327 flow [2023-11-30 05:12:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:12:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:12:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-11-30 05:12:02,424 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.829736211031175 [2023-11-30 05:12:02,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-11-30 05:12:02,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-11-30 05:12:02,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:02,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-11-30 05:12:02,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,435 INFO L307 CegarLoopForPetriNet]: 126 programPoint places, -3 predicate places. [2023-11-30 05:12:02,435 INFO L500 AbstractCegarLoop]: Abstraction has has 123 places, 128 transitions, 327 flow [2023-11-30 05:12:02,436 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,436 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:02,436 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:02,436 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 05:12:02,436 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:02,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:02,437 INFO L85 PathProgramCache]: Analyzing trace with hash -399990817, now seen corresponding path program 1 times [2023-11-30 05:12:02,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:02,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161483525] [2023-11-30 05:12:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:02,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:02,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:02,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161483525] [2023-11-30 05:12:02,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161483525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:12:02,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:12:02,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:12:02,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322926264] [2023-11-30 05:12:02,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:12:02,630 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:12:02,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:02,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:12:02,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:12:02,631 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 139 [2023-11-30 05:12:02,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 128 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:02,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 139 [2023-11-30 05:12:02,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:02,777 INFO L124 PetriNetUnfolderBase]: 117/551 cut-off events. [2023-11-30 05:12:02,777 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-30 05:12:02,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 551 events. 117/551 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3079 event pairs, 6 based on Foata normal form. 0/485 useless extension candidates. Maximal degree in co-relation 877. Up to 174 conditions per place. [2023-11-30 05:12:02,783 INFO L140 encePairwiseOnDemand]: 133/139 looper letters, 33 selfloop transitions, 3 changer transitions 17/142 dead transitions. [2023-11-30 05:12:02,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 142 transitions, 483 flow [2023-11-30 05:12:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:12:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:12:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2023-11-30 05:12:02,789 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7535971223021583 [2023-11-30 05:12:02,789 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 419 transitions. [2023-11-30 05:12:02,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 419 transitions. [2023-11-30 05:12:02,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:02,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 419 transitions. [2023-11-30 05:12:02,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,796 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,796 INFO L307 CegarLoopForPetriNet]: 126 programPoint places, 0 predicate places. [2023-11-30 05:12:02,797 INFO L500 AbstractCegarLoop]: Abstraction has has 126 places, 142 transitions, 483 flow [2023-11-30 05:12:02,797 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:02,797 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:02,797 INFO L232 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:02,797 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 05:12:02,798 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:02,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1175489340, now seen corresponding path program 1 times [2023-11-30 05:12:02,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:02,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105595470] [2023-11-30 05:12:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:02,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:03,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105595470] [2023-11-30 05:12:03,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105595470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:12:03,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939189207] [2023-11-30 05:12:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:03,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:12:03,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:12:03,007 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) [2023-11-30 05:12:03,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-30 05:12:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:03,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:12:03,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:12:03,145 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 [2023-11-30 05:12:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:03,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:12:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:03,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939189207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:12:03,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:12:03,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-30 05:12:03,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219790551] [2023-11-30 05:12:03,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:12:03,383 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-30 05:12:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-30 05:12:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-30 05:12:03,386 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 139 [2023-11-30 05:12:03,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 142 transitions, 483 flow. Second operand has 11 states, 11 states have (on average 94.63636363636364) internal successors, (1041), 11 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:03,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:03,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 139 [2023-11-30 05:12:03,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:03,496 INFO L124 PetriNetUnfolderBase]: 30/200 cut-off events. [2023-11-30 05:12:03,496 INFO L125 PetriNetUnfolderBase]: For 111/120 co-relation queries the response was YES. [2023-11-30 05:12:03,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 200 events. 30/200 cut-off events. For 111/120 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 580 event pairs, 6 based on Foata normal form. 6/206 useless extension candidates. Maximal degree in co-relation 330. Up to 46 conditions per place. [2023-11-30 05:12:03,498 INFO L140 encePairwiseOnDemand]: 132/139 looper letters, 34 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-11-30 05:12:03,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 95 transitions, 416 flow [2023-11-30 05:12:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 05:12:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 05:12:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 685 transitions. [2023-11-30 05:12:03,500 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7040082219938335 [2023-11-30 05:12:03,500 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 685 transitions. [2023-11-30 05:12:03,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 685 transitions. [2023-11-30 05:12:03,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:03,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 685 transitions. [2023-11-30 05:12:03,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.85714285714286) internal successors, (685), 7 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:03,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:03,503 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 139.0) internal successors, (1112), 8 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:03,504 INFO L307 CegarLoopForPetriNet]: 126 programPoint places, -37 predicate places. [2023-11-30 05:12:03,505 INFO L500 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 416 flow [2023-11-30 05:12:03,505 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 94.63636363636364) internal successors, (1041), 11 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:03,505 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:03,506 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:03,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-30 05:12:03,710 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:12:03,711 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:03,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2080431527, now seen corresponding path program 1 times [2023-11-30 05:12:03,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:03,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81647609] [2023-11-30 05:12:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:03,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:12:03,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:12:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:12:03,763 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:12:03,763 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:12:03,764 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:12:03,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:12:03,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:12:03,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:12:03,765 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:12:03,766 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 05:12:03,766 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-30 05:12:03,767 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:12:03,767 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-30 05:12:03,789 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-30 05:12:03,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 172 transitions, 360 flow [2023-11-30 05:12:03,818 INFO L124 PetriNetUnfolderBase]: 43/314 cut-off events. [2023-11-30 05:12:03,818 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-30 05:12:03,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 314 events. 43/314 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1054 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 198. Up to 9 conditions per place. [2023-11-30 05:12:03,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 172 transitions, 360 flow [2023-11-30 05:12:03,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 172 transitions, 360 flow [2023-11-30 05:12:03,823 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:12:03,825 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;@1a473856, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:12:03,825 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:12:03,828 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:12:03,828 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2023-11-30 05:12:03,828 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:12:03,828 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:03,828 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:03,828 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:03,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash 24382730, now seen corresponding path program 1 times [2023-11-30 05:12:03,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:03,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099194596] [2023-11-30 05:12:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:03,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:03,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099194596] [2023-11-30 05:12:03,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099194596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:12:03,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:12:03,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:12:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916350083] [2023-11-30 05:12:03,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:12:03,867 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:12:03,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:03,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:12:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:12:03,868 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 172 [2023-11-30 05:12:03,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 172 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:03,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:03,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 172 [2023-11-30 05:12:03,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:04,255 INFO L124 PetriNetUnfolderBase]: 1122/3753 cut-off events. [2023-11-30 05:12:04,256 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-30 05:12:04,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5629 conditions, 3753 events. 1122/3753 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 35370 event pairs, 786 based on Foata normal form. 971/4361 useless extension candidates. Maximal degree in co-relation 749. Up to 1341 conditions per place. [2023-11-30 05:12:04,273 INFO L140 encePairwiseOnDemand]: 150/172 looper letters, 30 selfloop transitions, 1 changer transitions 17/161 dead transitions. [2023-11-30 05:12:04,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 161 transitions, 430 flow [2023-11-30 05:12:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:12:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:12:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-11-30 05:12:04,275 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8313953488372093 [2023-11-30 05:12:04,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-11-30 05:12:04,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-11-30 05:12:04,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:04,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-11-30 05:12:04,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:04,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:04,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:04,278 INFO L307 CegarLoopForPetriNet]: 154 programPoint places, -3 predicate places. [2023-11-30 05:12:04,279 INFO L500 AbstractCegarLoop]: Abstraction has has 151 places, 161 transitions, 430 flow [2023-11-30 05:12:04,279 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:04,279 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:04,279 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:04,279 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-30 05:12:04,279 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:04,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash 24382731, now seen corresponding path program 1 times [2023-11-30 05:12:04,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:04,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821648062] [2023-11-30 05:12:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:04,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:04,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:04,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821648062] [2023-11-30 05:12:04,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821648062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:12:04,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:12:04,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:12:04,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99609505] [2023-11-30 05:12:04,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:12:04,347 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:12:04,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:04,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:12:04,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:12:04,348 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 172 [2023-11-30 05:12:04,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 161 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:04,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:04,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 172 [2023-11-30 05:12:04,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:04,776 INFO L124 PetriNetUnfolderBase]: 1700/4892 cut-off events. [2023-11-30 05:12:04,776 INFO L125 PetriNetUnfolderBase]: For 1012/1012 co-relation queries the response was YES. [2023-11-30 05:12:04,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9737 conditions, 4892 events. 1700/4892 cut-off events. For 1012/1012 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 44132 event pairs, 570 based on Foata normal form. 0/4329 useless extension candidates. Maximal degree in co-relation 1249. Up to 2193 conditions per place. [2023-11-30 05:12:04,871 INFO L140 encePairwiseOnDemand]: 166/172 looper letters, 43 selfloop transitions, 3 changer transitions 29/183 dead transitions. [2023-11-30 05:12:04,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 183 transitions, 658 flow [2023-11-30 05:12:04,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:12:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:12:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 511 transitions. [2023-11-30 05:12:04,873 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7427325581395349 [2023-11-30 05:12:04,873 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 511 transitions. [2023-11-30 05:12:04,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 511 transitions. [2023-11-30 05:12:04,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:04,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 511 transitions. [2023-11-30 05:12:04,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:04,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:04,875 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:04,884 INFO L307 CegarLoopForPetriNet]: 154 programPoint places, 0 predicate places. [2023-11-30 05:12:04,884 INFO L500 AbstractCegarLoop]: Abstraction has has 154 places, 183 transitions, 658 flow [2023-11-30 05:12:04,884 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:04,884 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:04,885 INFO L232 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:04,885 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-30 05:12:04,885 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:04,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1317130153, now seen corresponding path program 1 times [2023-11-30 05:12:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:04,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513078377] [2023-11-30 05:12:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:04,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:04,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513078377] [2023-11-30 05:12:04,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513078377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:12:04,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504068863] [2023-11-30 05:12:04,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:04,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:12:04,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:12:04,977 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) [2023-11-30 05:12:04,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-30 05:12:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:05,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:12:05,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:12:05,140 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 [2023-11-30 05:12:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:05,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:12:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:05,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504068863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:12:05,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:12:05,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-30 05:12:05,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720761285] [2023-11-30 05:12:05,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:12:05,285 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-30 05:12:05,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-30 05:12:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-30 05:12:05,287 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 172 [2023-11-30 05:12:05,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 183 transitions, 658 flow. Second operand has 11 states, 11 states have (on average 113.63636363636364) internal successors, (1250), 11 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:05,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:05,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 172 [2023-11-30 05:12:05,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:05,888 INFO L124 PetriNetUnfolderBase]: 1636/4480 cut-off events. [2023-11-30 05:12:05,889 INFO L125 PetriNetUnfolderBase]: For 2377/2495 co-relation queries the response was YES. [2023-11-30 05:12:05,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11535 conditions, 4480 events. 1636/4480 cut-off events. For 2377/2495 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 38370 event pairs, 28 based on Foata normal form. 3/4106 useless extension candidates. Maximal degree in co-relation 1591. Up to 2059 conditions per place. [2023-11-30 05:12:05,911 INFO L140 encePairwiseOnDemand]: 163/172 looper letters, 100 selfloop transitions, 9 changer transitions 29/245 dead transitions. [2023-11-30 05:12:05,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 245 transitions, 1296 flow [2023-11-30 05:12:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 05:12:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 05:12:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1237 transitions. [2023-11-30 05:12:05,913 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7191860465116279 [2023-11-30 05:12:05,913 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1237 transitions. [2023-11-30 05:12:05,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1237 transitions. [2023-11-30 05:12:05,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:05,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1237 transitions. [2023-11-30 05:12:05,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.7) internal successors, (1237), 10 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:05,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 172.0) internal successors, (1892), 11 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:05,918 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 172.0) internal successors, (1892), 11 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:05,918 INFO L307 CegarLoopForPetriNet]: 154 programPoint places, 8 predicate places. [2023-11-30 05:12:05,919 INFO L500 AbstractCegarLoop]: Abstraction has has 162 places, 245 transitions, 1296 flow [2023-11-30 05:12:05,919 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 113.63636363636364) internal successors, (1250), 11 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:05,919 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:05,919 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:05,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-30 05:12:06,123 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,SelfDestructingSolverStorable6 [2023-11-30 05:12:06,123 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:06,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1852172552, now seen corresponding path program 1 times [2023-11-30 05:12:06,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:06,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285420209] [2023-11-30 05:12:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:06,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:12:06,135 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:12:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:12:06,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:12:06,145 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:12:06,146 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:12:06,146 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:12:06,146 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:12:06,146 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:12:06,146 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:12:06,146 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-30 05:12:06,146 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-30 05:12:06,147 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:12:06,147 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-30 05:12:06,161 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-30 05:12:06,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 205 transitions, 437 flow [2023-11-30 05:12:06,190 INFO L124 PetriNetUnfolderBase]: 66/471 cut-off events. [2023-11-30 05:12:06,190 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-30 05:12:06,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 471 events. 66/471 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1767 event pairs, 1 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 322. Up to 16 conditions per place. [2023-11-30 05:12:06,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 205 transitions, 437 flow [2023-11-30 05:12:06,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 205 transitions, 437 flow [2023-11-30 05:12:06,196 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:12:06,197 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;@1a473856, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:12:06,197 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:12:06,198 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:12:06,199 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2023-11-30 05:12:06,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:12:06,199 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:06,199 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:06,199 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:06,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1966897225, now seen corresponding path program 1 times [2023-11-30 05:12:06,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:06,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365331739] [2023-11-30 05:12:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:06,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:06,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365331739] [2023-11-30 05:12:06,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365331739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:12:06,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:12:06,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:12:06,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783667914] [2023-11-30 05:12:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:12:06,224 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:12:06,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:12:06,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:12:06,224 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 205 [2023-11-30 05:12:06,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 205 transitions, 437 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:06,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:06,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 205 [2023-11-30 05:12:06,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:09,245 INFO L124 PetriNetUnfolderBase]: 12842/32105 cut-off events. [2023-11-30 05:12:09,245 INFO L125 PetriNetUnfolderBase]: For 925/925 co-relation queries the response was YES. [2023-11-30 05:12:09,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50715 conditions, 32105 events. 12842/32105 cut-off events. For 925/925 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 373806 event pairs, 9043 based on Foata normal form. 10178/39589 useless extension candidates. Maximal degree in co-relation 5618. Up to 13148 conditions per place. [2023-11-30 05:12:09,438 INFO L140 encePairwiseOnDemand]: 177/205 looper letters, 38 selfloop transitions, 1 changer transitions 23/194 dead transitions. [2023-11-30 05:12:09,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 194 transitions, 535 flow [2023-11-30 05:12:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:12:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:12:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-11-30 05:12:09,439 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.832520325203252 [2023-11-30 05:12:09,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-11-30 05:12:09,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-11-30 05:12:09,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:09,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-11-30 05:12:09,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:09,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:09,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:09,442 INFO L307 CegarLoopForPetriNet]: 182 programPoint places, -3 predicate places. [2023-11-30 05:12:09,442 INFO L500 AbstractCegarLoop]: Abstraction has has 179 places, 194 transitions, 535 flow [2023-11-30 05:12:09,442 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:09,442 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:09,442 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:09,442 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-30 05:12:09,443 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:09,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:09,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1966897224, now seen corresponding path program 1 times [2023-11-30 05:12:09,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:09,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793276972] [2023-11-30 05:12:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:09,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:09,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:09,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793276972] [2023-11-30 05:12:09,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793276972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:12:09,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:12:09,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:12:09,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235224699] [2023-11-30 05:12:09,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:12:09,490 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:12:09,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:09,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:12:09,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:12:09,491 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 205 [2023-11-30 05:12:09,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 194 transitions, 535 flow. Second operand has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:09,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:09,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 205 [2023-11-30 05:12:09,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:13,063 INFO L124 PetriNetUnfolderBase]: 17746/43198 cut-off events. [2023-11-30 05:12:13,063 INFO L125 PetriNetUnfolderBase]: For 7453/8771 co-relation queries the response was YES. [2023-11-30 05:12:13,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91421 conditions, 43198 events. 17746/43198 cut-off events. For 7453/8771 co-relation queries the response was YES. Maximal size of possible extension queue 1322. Compared 507025 event pairs, 8953 based on Foata normal form. 0/40688 useless extension candidates. Maximal degree in co-relation 9905. Up to 21545 conditions per place. [2023-11-30 05:12:13,367 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 51 selfloop transitions, 3 changer transitions 41/222 dead transitions. [2023-11-30 05:12:13,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 222 transitions, 827 flow [2023-11-30 05:12:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:12:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:12:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2023-11-30 05:12:13,368 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7329268292682927 [2023-11-30 05:12:13,369 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2023-11-30 05:12:13,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2023-11-30 05:12:13,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:13,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2023-11-30 05:12:13,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:13,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:13,371 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:13,372 INFO L307 CegarLoopForPetriNet]: 182 programPoint places, 0 predicate places. [2023-11-30 05:12:13,372 INFO L500 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 827 flow [2023-11-30 05:12:13,373 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:13,373 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:13,373 INFO L232 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:13,373 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-30 05:12:13,373 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:13,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1081587959, now seen corresponding path program 1 times [2023-11-30 05:12:13,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:13,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080068792] [2023-11-30 05:12:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:13,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:13,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080068792] [2023-11-30 05:12:13,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080068792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:12:13,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805879530] [2023-11-30 05:12:13,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:13,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:12:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:12:13,480 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) [2023-11-30 05:12:13,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-30 05:12:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:13,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:12:13,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:12:13,555 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 [2023-11-30 05:12:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:13,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:12:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:13,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805879530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:12:13,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:12:13,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-30 05:12:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467712996] [2023-11-30 05:12:13,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:12:13,792 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-30 05:12:13,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-30 05:12:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-30 05:12:13,794 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 205 [2023-11-30 05:12:13,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 827 flow. Second operand has 11 states, 11 states have (on average 132.63636363636363) internal successors, (1459), 11 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:13,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:13,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 205 [2023-11-30 05:12:13,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:17,717 INFO L124 PetriNetUnfolderBase]: 19446/43318 cut-off events. [2023-11-30 05:12:17,718 INFO L125 PetriNetUnfolderBase]: For 22148/26790 co-relation queries the response was YES. [2023-11-30 05:12:17,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119100 conditions, 43318 events. 19446/43318 cut-off events. For 22148/26790 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 474536 event pairs, 1127 based on Foata normal form. 3/39247 useless extension candidates. Maximal degree in co-relation 12695. Up to 22293 conditions per place. [2023-11-30 05:12:18,070 INFO L140 encePairwiseOnDemand]: 195/205 looper letters, 120 selfloop transitions, 11 changer transitions 41/298 dead transitions. [2023-11-30 05:12:18,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 298 transitions, 1603 flow [2023-11-30 05:12:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 05:12:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 05:12:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1455 transitions. [2023-11-30 05:12:18,077 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7097560975609756 [2023-11-30 05:12:18,077 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1455 transitions. [2023-11-30 05:12:18,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1455 transitions. [2023-11-30 05:12:18,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:18,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1455 transitions. [2023-11-30 05:12:18,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 145.5) internal successors, (1455), 10 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:18,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 205.0) internal successors, (2255), 11 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:18,086 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 205.0) internal successors, (2255), 11 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:18,087 INFO L307 CegarLoopForPetriNet]: 182 programPoint places, 9 predicate places. [2023-11-30 05:12:18,087 INFO L500 AbstractCegarLoop]: Abstraction has has 191 places, 298 transitions, 1603 flow [2023-11-30 05:12:18,087 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 132.63636363636363) internal successors, (1459), 11 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:18,087 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:18,088 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:18,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-30 05:12:18,292 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:12:18,292 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:18,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 834964396, now seen corresponding path program 1 times [2023-11-30 05:12:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:18,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69477114] [2023-11-30 05:12:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:18,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-30 05:12:18,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:18,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69477114] [2023-11-30 05:12:18,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69477114] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:12:18,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765161479] [2023-11-30 05:12:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:18,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:12:18,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:12:18,394 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) [2023-11-30 05:12:18,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-30 05:12:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:18,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-30 05:12:18,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:12:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:18,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:12:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765161479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:12:18,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:12:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2023-11-30 05:12:18,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152303177] [2023-11-30 05:12:18,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:12:18,566 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-30 05:12:18,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-30 05:12:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-11-30 05:12:18,568 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 205 [2023-11-30 05:12:18,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 298 transitions, 1603 flow. Second operand has 17 states, 17 states have (on average 127.23529411764706) internal successors, (2163), 17 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:18,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:18,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 205 [2023-11-30 05:12:18,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:20,011 INFO L124 PetriNetUnfolderBase]: 6372/12928 cut-off events. [2023-11-30 05:12:20,012 INFO L125 PetriNetUnfolderBase]: For 14587/16817 co-relation queries the response was YES. [2023-11-30 05:12:20,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47631 conditions, 12928 events. 6372/12928 cut-off events. For 14587/16817 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 114190 event pairs, 189 based on Foata normal form. 215/12621 useless extension candidates. Maximal degree in co-relation 5111. Up to 8691 conditions per place. [2023-11-30 05:12:20,109 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 161 selfloop transitions, 11 changer transitions 0/266 dead transitions. [2023-11-30 05:12:20,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 266 transitions, 1894 flow [2023-11-30 05:12:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-30 05:12:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-30 05:12:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1768 transitions. [2023-11-30 05:12:20,112 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6634146341463415 [2023-11-30 05:12:20,112 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1768 transitions. [2023-11-30 05:12:20,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1768 transitions. [2023-11-30 05:12:20,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:20,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1768 transitions. [2023-11-30 05:12:20,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:20,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 205.0) internal successors, (2870), 14 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:20,119 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 205.0) internal successors, (2870), 14 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:20,119 INFO L307 CegarLoopForPetriNet]: 182 programPoint places, -21 predicate places. [2023-11-30 05:12:20,119 INFO L500 AbstractCegarLoop]: Abstraction has has 161 places, 266 transitions, 1894 flow [2023-11-30 05:12:20,120 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 127.23529411764706) internal successors, (2163), 17 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:20,120 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:20,120 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:20,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-30 05:12:20,324 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:12:20,324 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:20,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:20,325 INFO L85 PathProgramCache]: Analyzing trace with hash -734692398, now seen corresponding path program 1 times [2023-11-30 05:12:20,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:20,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760695629] [2023-11-30 05:12:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:20,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:20,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760695629] [2023-11-30 05:12:20,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760695629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:12:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604008039] [2023-11-30 05:12:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:20,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:12:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:12:20,648 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) [2023-11-30 05:12:20,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-30 05:12:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:20,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-30 05:12:20,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:12:20,736 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 [2023-11-30 05:12:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:20,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:12:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:21,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604008039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:12:21,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:12:21,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-11-30 05:12:21,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7369781] [2023-11-30 05:12:21,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:12:21,135 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-30 05:12:21,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-30 05:12:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-11-30 05:12:21,138 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 205 [2023-11-30 05:12:21,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 266 transitions, 1894 flow. Second operand has 27 states, 27 states have (on average 132.62962962962962) internal successors, (3581), 27 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:21,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:21,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 205 [2023-11-30 05:12:21,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:22,795 INFO L124 PetriNetUnfolderBase]: 5490/11854 cut-off events. [2023-11-30 05:12:22,795 INFO L125 PetriNetUnfolderBase]: For 20039/22751 co-relation queries the response was YES. [2023-11-30 05:12:22,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49551 conditions, 11854 events. 5490/11854 cut-off events. For 20039/22751 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 106764 event pairs, 242 based on Foata normal form. 951/12690 useless extension candidates. Maximal degree in co-relation 5301. Up to 7466 conditions per place. [2023-11-30 05:12:22,876 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 160 selfloop transitions, 11 changer transitions 0/265 dead transitions. [2023-11-30 05:12:22,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 265 transitions, 2226 flow [2023-11-30 05:12:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-30 05:12:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-30 05:12:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1844 transitions. [2023-11-30 05:12:22,879 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6919324577861163 [2023-11-30 05:12:22,879 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1844 transitions. [2023-11-30 05:12:22,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1844 transitions. [2023-11-30 05:12:22,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:22,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1844 transitions. [2023-11-30 05:12:22,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 141.84615384615384) internal successors, (1844), 13 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:22,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 205.0) internal successors, (2870), 14 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:22,885 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 205.0) internal successors, (2870), 14 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:22,886 INFO L307 CegarLoopForPetriNet]: 182 programPoint places, -10 predicate places. [2023-11-30 05:12:22,886 INFO L500 AbstractCegarLoop]: Abstraction has has 172 places, 265 transitions, 2226 flow [2023-11-30 05:12:22,887 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 132.62962962962962) internal successors, (3581), 27 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:22,887 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:22,887 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:22,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-30 05:12:23,091 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,SelfDestructingSolverStorable12 [2023-11-30 05:12:23,091 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:23,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1300627064, now seen corresponding path program 1 times [2023-11-30 05:12:23,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:23,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508777296] [2023-11-30 05:12:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:23,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:12:23,103 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:12:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:12:23,125 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:12:23,125 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:12:23,126 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:12:23,126 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:12:23,126 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:12:23,126 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:12:23,126 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:12:23,126 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-30 05:12:23,126 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-30 05:12:23,127 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:12:23,127 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-30 05:12:23,148 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-30 05:12:23,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 238 transitions, 516 flow [2023-11-30 05:12:23,196 INFO L124 PetriNetUnfolderBase]: 101/708 cut-off events. [2023-11-30 05:12:23,196 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-30 05:12:23,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 708 events. 101/708 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2984 event pairs, 6 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 491. Up to 32 conditions per place. [2023-11-30 05:12:23,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 238 transitions, 516 flow [2023-11-30 05:12:23,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 238 transitions, 516 flow [2023-11-30 05:12:23,207 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:12:23,208 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;@1a473856, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:12:23,208 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:12:23,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:12:23,209 INFO L124 PetriNetUnfolderBase]: 1/49 cut-off events. [2023-11-30 05:12:23,209 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:12:23,209 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:23,210 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:23,210 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:23,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2078863387, now seen corresponding path program 1 times [2023-11-30 05:12:23,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:23,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818559412] [2023-11-30 05:12:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:23,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:23,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818559412] [2023-11-30 05:12:23,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818559412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:12:23,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:12:23,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:12:23,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414726530] [2023-11-30 05:12:23,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:12:23,232 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:12:23,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:12:23,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:12:23,232 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 238 [2023-11-30 05:12:23,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 238 transitions, 516 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:23,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:23,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 238 [2023-11-30 05:12:23,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:12:51,664 INFO L124 PetriNetUnfolderBase]: 130164/273019 cut-off events. [2023-11-30 05:12:51,665 INFO L125 PetriNetUnfolderBase]: For 10376/10376 co-relation queries the response was YES. [2023-11-30 05:12:53,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447698 conditions, 273019 events. 130164/273019 cut-off events. For 10376/10376 co-relation queries the response was YES. Maximal size of possible extension queue 8165. Compared 3596883 event pairs, 90828 based on Foata normal form. 98487/351501 useless extension candidates. Maximal degree in co-relation 50726. Up to 121191 conditions per place. [2023-11-30 05:12:54,299 INFO L140 encePairwiseOnDemand]: 204/238 looper letters, 46 selfloop transitions, 1 changer transitions 29/227 dead transitions. [2023-11-30 05:12:54,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 227 transitions, 642 flow [2023-11-30 05:12:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:12:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:12:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-11-30 05:12:54,300 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2023-11-30 05:12:54,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-11-30 05:12:54,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-11-30 05:12:54,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:12:54,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-11-30 05:12:54,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:54,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:54,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:54,303 INFO L307 CegarLoopForPetriNet]: 210 programPoint places, -3 predicate places. [2023-11-30 05:12:54,303 INFO L500 AbstractCegarLoop]: Abstraction has has 207 places, 227 transitions, 642 flow [2023-11-30 05:12:54,303 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:54,303 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:12:54,303 INFO L232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:12:54,303 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-30 05:12:54,303 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:12:54,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:12:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2078863386, now seen corresponding path program 1 times [2023-11-30 05:12:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:12:54,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012493383] [2023-11-30 05:12:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:12:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:12:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:12:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:12:54,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:12:54,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012493383] [2023-11-30 05:12:54,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012493383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:12:54,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:12:54,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:12:54,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431013172] [2023-11-30 05:12:54,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:12:54,342 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:12:54,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:12:54,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:12:54,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:12:54,343 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 238 [2023-11-30 05:12:54,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 227 transitions, 642 flow. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:12:54,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:12:54,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 238 [2023-11-30 05:12:54,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:13:33,331 INFO L124 PetriNetUnfolderBase]: 176228/366432 cut-off events. [2023-11-30 05:13:33,331 INFO L125 PetriNetUnfolderBase]: For 61074/73130 co-relation queries the response was YES. [2023-11-30 05:13:35,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817546 conditions, 366432 events. 176228/366432 cut-off events. For 61074/73130 co-relation queries the response was YES. Maximal size of possible extension queue 8607. Compared 4893369 event pairs, 100902 based on Foata normal form. 0/348229 useless extension candidates. Maximal degree in co-relation 92225. Up to 197767 conditions per place. [2023-11-30 05:13:37,752 INFO L140 encePairwiseOnDemand]: 232/238 looper letters, 59 selfloop transitions, 3 changer transitions 53/261 dead transitions. [2023-11-30 05:13:37,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 261 transitions, 998 flow [2023-11-30 05:13:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:13:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:13:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 691 transitions. [2023-11-30 05:13:37,754 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7258403361344538 [2023-11-30 05:13:37,754 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 691 transitions. [2023-11-30 05:13:37,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 691 transitions. [2023-11-30 05:13:37,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:13:37,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 691 transitions. [2023-11-30 05:13:37,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:13:37,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:13:37,771 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:13:37,771 INFO L307 CegarLoopForPetriNet]: 210 programPoint places, 0 predicate places. [2023-11-30 05:13:37,771 INFO L500 AbstractCegarLoop]: Abstraction has has 210 places, 261 transitions, 998 flow [2023-11-30 05:13:37,771 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:13:37,771 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:13:37,771 INFO L232 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:13:37,771 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-30 05:13:37,772 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:13:37,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:13:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash 468862758, now seen corresponding path program 1 times [2023-11-30 05:13:37,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:13:37,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787385905] [2023-11-30 05:13:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:13:37,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:13:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:13:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:13:38,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:13:38,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787385905] [2023-11-30 05:13:38,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787385905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:13:38,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359258980] [2023-11-30 05:13:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:13:38,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:13:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:13:38,146 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) [2023-11-30 05:13:38,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-30 05:13:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:13:38,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:13:38,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:13:38,260 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 [2023-11-30 05:13:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:13:38,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:13:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:13:38,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359258980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:13:38,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:13:38,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-30 05:13:38,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314503402] [2023-11-30 05:13:38,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:13:38,473 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-30 05:13:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:13:38,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-30 05:13:38,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-30 05:13:38,475 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 238 [2023-11-30 05:13:38,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 261 transitions, 998 flow. Second operand has 11 states, 11 states have (on average 151.63636363636363) internal successors, (1668), 11 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:13:38,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:13:38,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 238 [2023-11-30 05:13:38,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand