/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_24-sound_lock_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 05:16:41,641 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 05:16:41,682 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 05:16:41,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 05:16:41,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 05:16:41,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 05:16:41,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 05:16:41,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 05:16:41,708 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 05:16:41,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 05:16:41,709 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 05:16:41,709 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 05:16:41,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 05:16:41,709 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 05:16:41,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 05:16:41,710 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 05:16:41,710 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 05:16:41,710 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 05:16:41,710 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 05:16:41,711 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 05:16:41,711 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 05:16:41,712 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 05:16:41,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 05:16:41,728 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 05:16:41,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 05:16:41,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:16:41,729 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 05:16:41,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 05:16:41,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 05:16:41,730 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 05:16:41,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 05:16:41,730 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 05:16:41,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 05:16:41,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 05:16:41,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 05:16:41,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 05:16:41,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 05:16:41,923 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 05:16:41,923 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 05:16:41,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-30 05:16:43,028 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 05:16:43,211 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 05:16:43,212 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-30 05:16:43,221 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968fd92d7/facf3f38d3b34da7baecf6446fe34e4f/FLAG2d7cc8642 [2023-11-30 05:16:43,230 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968fd92d7/facf3f38d3b34da7baecf6446fe34e4f [2023-11-30 05:16:43,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 05:16:43,233 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 05:16:43,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 05:16:43,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 05:16:43,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 05:16:43,237 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42126b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43, skipping insertion in model container [2023-11-30 05:16:43,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,266 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 05:16:43,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:16:43,512 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 05:16:43,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:16:43,578 INFO L206 MainTranslator]: Completed translation [2023-11-30 05:16:43,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43 WrapperNode [2023-11-30 05:16:43,578 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 05:16:43,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 05:16:43,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 05:16:43,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 05:16:43,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,596 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,611 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-11-30 05:16:43,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 05:16:43,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 05:16:43,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 05:16:43,614 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 05:16:43,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,633 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,640 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 05:16:43,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 05:16:43,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 05:16:43,641 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 05:16:43,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (1/1) ... [2023-11-30 05:16:43,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:16:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:16:43,674 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 05:16:43,680 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 05:16:43,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 05:16:43,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 05:16:43,696 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-30 05:16:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 05:16:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 05:16:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-30 05:16:43,697 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-30 05:16:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 05:16:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 05:16:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-30 05:16:43,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 05:16:43,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 05:16:43,698 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 05:16:43,774 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 05:16:43,775 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 05:16:43,915 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 05:16:43,954 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 05:16:43,954 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-30 05:16:43,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:16:43 BoogieIcfgContainer [2023-11-30 05:16:43,955 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 05:16:43,957 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 05:16:43,957 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 05:16:43,959 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 05:16:43,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 05:16:43" (1/3) ... [2023-11-30 05:16:43,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3649eeb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:16:43, skipping insertion in model container [2023-11-30 05:16:43,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:16:43" (2/3) ... [2023-11-30 05:16:43,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3649eeb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:16:43, skipping insertion in model container [2023-11-30 05:16:43,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:16:43" (3/3) ... [2023-11-30 05:16:43,961 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-11-30 05:16:43,972 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 05:16:43,972 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-30 05:16:43,972 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 05:16:44,016 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-30 05:16:44,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 131 transitions, 269 flow [2023-11-30 05:16:44,122 INFO L124 PetriNetUnfolderBase]: 20/179 cut-off events. [2023-11-30 05:16:44,122 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-30 05:16:44,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 179 events. 20/179 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 469 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 88. Up to 4 conditions per place. [2023-11-30 05:16:44,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 131 transitions, 269 flow [2023-11-30 05:16:44,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 131 transitions, 269 flow [2023-11-30 05:16:44,151 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:16:44,156 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;@125b68b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:16:44,156 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:16:44,172 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:16:44,172 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-11-30 05:16:44,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:16:44,172 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:44,173 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] [2023-11-30 05:16:44,174 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 05:16:44,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1617999817, now seen corresponding path program 1 times [2023-11-30 05:16:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:44,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045971171] [2023-11-30 05:16:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:44,432 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 05:16:44,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:44,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045971171] [2023-11-30 05:16:44,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045971171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:44,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:44,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:16:44,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713159294] [2023-11-30 05:16:44,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:44,440 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:16:44,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:16:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:16:44,472 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 131 [2023-11-30 05:16:44,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 131 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 05:16:44,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:44,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 131 [2023-11-30 05:16:44,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:44,601 INFO L124 PetriNetUnfolderBase]: 68/439 cut-off events. [2023-11-30 05:16:44,602 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-30 05:16:44,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 439 events. 68/439 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2227 event pairs, 48 based on Foata normal form. 82/488 useless extension candidates. Maximal degree in co-relation 504. Up to 121 conditions per place. [2023-11-30 05:16:44,606 INFO L140 encePairwiseOnDemand]: 115/131 looper letters, 23 selfloop transitions, 1 changer transitions 17/120 dead transitions. [2023-11-30 05:16:44,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 120 transitions, 313 flow [2023-11-30 05:16:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:16:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:16:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-11-30 05:16:44,620 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8142493638676844 [2023-11-30 05:16:44,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-11-30 05:16:44,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-11-30 05:16:44,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:44,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-11-30 05:16:44,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 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 05:16:44,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 05:16:44,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 05:16:44,634 INFO L307 CegarLoopForPetriNet]: 120 programPoint places, -3 predicate places. [2023-11-30 05:16:44,634 INFO L500 AbstractCegarLoop]: Abstraction has has 117 places, 120 transitions, 313 flow [2023-11-30 05:16:44,634 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 05:16:44,634 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:44,634 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] [2023-11-30 05:16:44,635 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 05:16:44,635 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 05:16:44,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:44,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1617999818, now seen corresponding path program 1 times [2023-11-30 05:16:44,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:44,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390327496] [2023-11-30 05:16:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:44,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:44,758 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 05:16:44,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:44,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390327496] [2023-11-30 05:16:44,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390327496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:44,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:44,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:16:44,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051113218] [2023-11-30 05:16:44,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:44,760 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:16:44,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:16:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:16:44,761 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2023-11-30 05:16:44,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 120 transitions, 313 flow. Second operand has 4 states, 4 states have (on average 86.5) internal successors, (346), 4 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 05:16:44,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:44,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2023-11-30 05:16:44,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:44,870 INFO L124 PetriNetUnfolderBase]: 97/489 cut-off events. [2023-11-30 05:16:44,871 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2023-11-30 05:16:44,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 489 events. 97/489 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2497 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 814. Up to 174 conditions per place. [2023-11-30 05:16:44,876 INFO L140 encePairwiseOnDemand]: 125/131 looper letters, 34 selfloop transitions, 3 changer transitions 17/134 dead transitions. [2023-11-30 05:16:44,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 471 flow [2023-11-30 05:16:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:16:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:16:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 384 transitions. [2023-11-30 05:16:44,878 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.732824427480916 [2023-11-30 05:16:44,878 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 384 transitions. [2023-11-30 05:16:44,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 384 transitions. [2023-11-30 05:16:44,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:44,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 384 transitions. [2023-11-30 05:16:44,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 05:16:44,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 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 05:16:44,882 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 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 05:16:44,882 INFO L307 CegarLoopForPetriNet]: 120 programPoint places, 0 predicate places. [2023-11-30 05:16:44,882 INFO L500 AbstractCegarLoop]: Abstraction has has 120 places, 134 transitions, 471 flow [2023-11-30 05:16:44,883 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.5) internal successors, (346), 4 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 05:16:44,883 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:44,883 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] [2023-11-30 05:16:44,883 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 05:16:44,883 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 05:16:44,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1353463022, now seen corresponding path program 1 times [2023-11-30 05:16:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:44,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141545549] [2023-11-30 05:16:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:45,136 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 05:16:45,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:45,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141545549] [2023-11-30 05:16:45,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141545549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:16:45,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536468893] [2023-11-30 05:16:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:45,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:16:45,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:16:45,154 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 05:16:45,177 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 05:16:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:45,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:16:45,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:16:45,309 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 05:16:45,429 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 05:16:45,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:16:45,547 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 05:16:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536468893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:16:45,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:16:45,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-30 05:16:45,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269304788] [2023-11-30 05:16:45,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:16:45,553 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-30 05:16:45,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-30 05:16:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-30 05:16:45,556 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2023-11-30 05:16:45,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 134 transitions, 471 flow. Second operand has 14 states, 14 states have (on average 85.57142857142857) internal successors, (1198), 14 states have internal predecessors, (1198), 0 states have call successors, (0), 0 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 05:16:45,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:45,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2023-11-30 05:16:45,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:45,678 INFO L124 PetriNetUnfolderBase]: 31/170 cut-off events. [2023-11-30 05:16:45,678 INFO L125 PetriNetUnfolderBase]: For 117/136 co-relation queries the response was YES. [2023-11-30 05:16:45,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 170 events. 31/170 cut-off events. For 117/136 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 433 event pairs, 0 based on Foata normal form. 3/169 useless extension candidates. Maximal degree in co-relation 296. Up to 46 conditions per place. [2023-11-30 05:16:45,679 INFO L140 encePairwiseOnDemand]: 124/131 looper letters, 35 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-11-30 05:16:45,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 96 transitions, 424 flow [2023-11-30 05:16:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 05:16:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 05:16:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 623 transitions. [2023-11-30 05:16:45,681 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6793893129770993 [2023-11-30 05:16:45,681 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 623 transitions. [2023-11-30 05:16:45,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 623 transitions. [2023-11-30 05:16:45,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:45,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 623 transitions. [2023-11-30 05:16:45,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 05:16:45,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 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 05:16:45,685 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 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 05:16:45,685 INFO L307 CegarLoopForPetriNet]: 120 programPoint places, -31 predicate places. [2023-11-30 05:16:45,685 INFO L500 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 424 flow [2023-11-30 05:16:45,686 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 85.57142857142857) internal successors, (1198), 14 states have internal predecessors, (1198), 0 states have call successors, (0), 0 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 05:16:45,686 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:45,686 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] [2023-11-30 05:16:45,696 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 05:16:45,892 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 05:16:45,892 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 05:16:45,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash 992319609, now seen corresponding path program 1 times [2023-11-30 05:16:45,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:45,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959689874] [2023-11-30 05:16:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:45,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:16:45,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:16:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:16:45,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:16:45,940 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:16:45,941 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:16:45,942 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:16:45,942 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:16:45,942 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:16:45,942 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:16:45,943 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 05:16:45,943 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-30 05:16:45,945 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:16:45,945 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-30 05:16:45,976 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-30 05:16:45,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 164 transitions, 344 flow [2023-11-30 05:16:46,005 INFO L124 PetriNetUnfolderBase]: 35/288 cut-off events. [2023-11-30 05:16:46,006 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-30 05:16:46,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 288 events. 35/288 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 925 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 181. Up to 8 conditions per place. [2023-11-30 05:16:46,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 164 transitions, 344 flow [2023-11-30 05:16:46,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 164 transitions, 344 flow [2023-11-30 05:16:46,016 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:16:46,018 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;@125b68b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:16:46,018 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:16:46,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:16:46,022 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-11-30 05:16:46,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:16:46,022 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:46,023 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] [2023-11-30 05:16:46,023 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 05:16:46,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 596780617, now seen corresponding path program 1 times [2023-11-30 05:16:46,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:46,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551065420] [2023-11-30 05:16:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:46,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:46,083 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 05:16:46,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:46,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551065420] [2023-11-30 05:16:46,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551065420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:46,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:46,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:16:46,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950184762] [2023-11-30 05:16:46,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:46,085 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:16:46,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:46,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:16:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:16:46,086 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 164 [2023-11-30 05:16:46,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 164 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 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 05:16:46,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:46,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 164 [2023-11-30 05:16:46,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:46,439 INFO L124 PetriNetUnfolderBase]: 1096/3673 cut-off events. [2023-11-30 05:16:46,439 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-30 05:16:46,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5550 conditions, 3673 events. 1096/3673 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 31998 event pairs, 786 based on Foata normal form. 995/4418 useless extension candidates. Maximal degree in co-relation 740. Up to 1341 conditions per place. [2023-11-30 05:16:46,457 INFO L140 encePairwiseOnDemand]: 142/164 looper letters, 31 selfloop transitions, 1 changer transitions 17/153 dead transitions. [2023-11-30 05:16:46,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 153 transitions, 416 flow [2023-11-30 05:16:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:16:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:16:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-11-30 05:16:46,458 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8191056910569106 [2023-11-30 05:16:46,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-11-30 05:16:46,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-11-30 05:16:46,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:46,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-11-30 05:16:46,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 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 05:16:46,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 05:16:46,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 05:16:46,461 INFO L307 CegarLoopForPetriNet]: 148 programPoint places, -3 predicate places. [2023-11-30 05:16:46,461 INFO L500 AbstractCegarLoop]: Abstraction has has 145 places, 153 transitions, 416 flow [2023-11-30 05:16:46,461 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 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 05:16:46,461 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:46,461 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] [2023-11-30 05:16:46,461 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-30 05:16:46,462 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 05:16:46,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash 596780618, now seen corresponding path program 1 times [2023-11-30 05:16:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:46,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290548604] [2023-11-30 05:16:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:46,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:46,510 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 05:16:46,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:46,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290548604] [2023-11-30 05:16:46,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290548604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:46,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:46,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:16:46,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252474607] [2023-11-30 05:16:46,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:46,511 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:16:46,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:46,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:16:46,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:16:46,512 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 164 [2023-11-30 05:16:46,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 153 transitions, 416 flow. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 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 05:16:46,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:46,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 164 [2023-11-30 05:16:46,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:47,061 INFO L124 PetriNetUnfolderBase]: 1533/4389 cut-off events. [2023-11-30 05:16:47,061 INFO L125 PetriNetUnfolderBase]: For 957/957 co-relation queries the response was YES. [2023-11-30 05:16:47,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9236 conditions, 4389 events. 1533/4389 cut-off events. For 957/957 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 38204 event pairs, 570 based on Foata normal form. 0/3993 useless extension candidates. Maximal degree in co-relation 1186. Up to 2193 conditions per place. [2023-11-30 05:16:47,097 INFO L140 encePairwiseOnDemand]: 158/164 looper letters, 44 selfloop transitions, 3 changer transitions 29/175 dead transitions. [2023-11-30 05:16:47,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 175 transitions, 646 flow [2023-11-30 05:16:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:16:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:16:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2023-11-30 05:16:47,113 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.725609756097561 [2023-11-30 05:16:47,113 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2023-11-30 05:16:47,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2023-11-30 05:16:47,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:47,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2023-11-30 05:16:47,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 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 05:16:47,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 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 05:16:47,115 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 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 05:16:47,116 INFO L307 CegarLoopForPetriNet]: 148 programPoint places, 0 predicate places. [2023-11-30 05:16:47,116 INFO L500 AbstractCegarLoop]: Abstraction has has 148 places, 175 transitions, 646 flow [2023-11-30 05:16:47,116 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 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 05:16:47,116 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:47,116 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] [2023-11-30 05:16:47,116 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-30 05:16:47,116 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 05:16:47,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash 353563347, now seen corresponding path program 1 times [2023-11-30 05:16:47,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:47,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186135098] [2023-11-30 05:16:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:47,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:47,219 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 05:16:47,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:47,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186135098] [2023-11-30 05:16:47,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186135098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:16:47,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986393217] [2023-11-30 05:16:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:47,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:16:47,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:16:47,220 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 05:16:47,271 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 05:16:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:47,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:16:47,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:16:47,308 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 05:16:47,384 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 05:16:47,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:16:47,478 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 05:16:47,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986393217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:16:47,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:16:47,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-30 05:16:47,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803853161] [2023-11-30 05:16:47,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:16:47,479 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-30 05:16:47,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-30 05:16:47,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-30 05:16:47,481 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 164 [2023-11-30 05:16:47,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 175 transitions, 646 flow. Second operand has 14 states, 14 states have (on average 104.57142857142857) internal successors, (1464), 14 states have internal predecessors, (1464), 0 states have call successors, (0), 0 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 05:16:47,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:47,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 164 [2023-11-30 05:16:47,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:47,765 INFO L124 PetriNetUnfolderBase]: 493/1309 cut-off events. [2023-11-30 05:16:47,765 INFO L125 PetriNetUnfolderBase]: For 1073/1267 co-relation queries the response was YES. [2023-11-30 05:16:47,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3571 conditions, 1309 events. 493/1309 cut-off events. For 1073/1267 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8626 event pairs, 18 based on Foata normal form. 9/1301 useless extension candidates. Maximal degree in co-relation 468. Up to 753 conditions per place. [2023-11-30 05:16:47,774 INFO L140 encePairwiseOnDemand]: 157/164 looper letters, 80 selfloop transitions, 8 changer transitions 0/163 dead transitions. [2023-11-30 05:16:47,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 163 transitions, 842 flow [2023-11-30 05:16:47,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 05:16:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 05:16:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1112 transitions. [2023-11-30 05:16:47,777 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2023-11-30 05:16:47,777 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1112 transitions. [2023-11-30 05:16:47,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1112 transitions. [2023-11-30 05:16:47,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:47,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1112 transitions. [2023-11-30 05:16:47,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 111.2) internal successors, (1112), 10 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 05:16:47,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 164.0) internal successors, (1804), 11 states have internal predecessors, (1804), 0 states have call successors, (0), 0 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 05:16:47,781 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 164.0) internal successors, (1804), 11 states have internal predecessors, (1804), 0 states have call successors, (0), 0 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 05:16:47,782 INFO L307 CegarLoopForPetriNet]: 148 programPoint places, -28 predicate places. [2023-11-30 05:16:47,782 INFO L500 AbstractCegarLoop]: Abstraction has has 120 places, 163 transitions, 842 flow [2023-11-30 05:16:47,782 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.57142857142857) internal successors, (1464), 14 states have internal predecessors, (1464), 0 states have call successors, (0), 0 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 05:16:47,782 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:47,783 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] [2023-11-30 05:16:47,794 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 05:16:47,987 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 05:16:47,987 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 05:16:47,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash -292990925, now seen corresponding path program 1 times [2023-11-30 05:16:47,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:47,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317799340] [2023-11-30 05:16:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:16:48,014 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:16:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:16:48,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:16:48,040 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:16:48,040 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:16:48,040 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:16:48,040 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:16:48,040 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:16:48,041 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:16:48,041 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-30 05:16:48,041 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-30 05:16:48,041 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:16:48,041 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-30 05:16:48,072 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-30 05:16:48,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 197 transitions, 421 flow [2023-11-30 05:16:48,104 INFO L124 PetriNetUnfolderBase]: 55/436 cut-off events. [2023-11-30 05:16:48,105 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-30 05:16:48,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 436 events. 55/436 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1586 event pairs, 1 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 296. Up to 16 conditions per place. [2023-11-30 05:16:48,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 197 transitions, 421 flow [2023-11-30 05:16:48,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 197 transitions, 421 flow [2023-11-30 05:16:48,110 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:16:48,110 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;@125b68b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:16:48,110 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:16:48,113 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:16:48,113 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-11-30 05:16:48,113 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:16:48,113 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:48,113 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] [2023-11-30 05:16:48,113 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 05:16:48,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash -918004887, now seen corresponding path program 1 times [2023-11-30 05:16:48,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:48,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036087262] [2023-11-30 05:16:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:48,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:48,187 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 05:16:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:48,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036087262] [2023-11-30 05:16:48,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036087262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:48,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:48,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:16:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036113511] [2023-11-30 05:16:48,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:48,188 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:16:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:16:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:16:48,189 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 197 [2023-11-30 05:16:48,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 197 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 05:16:48,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:48,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 197 [2023-11-30 05:16:48,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:51,343 INFO L124 PetriNetUnfolderBase]: 12669/31584 cut-off events. [2023-11-30 05:16:51,343 INFO L125 PetriNetUnfolderBase]: For 925/925 co-relation queries the response was YES. [2023-11-30 05:16:51,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50195 conditions, 31584 events. 12669/31584 cut-off events. For 925/925 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 351721 event pairs, 9043 based on Foata normal form. 10399/40137 useless extension candidates. Maximal degree in co-relation 5539. Up to 13148 conditions per place. [2023-11-30 05:16:51,495 INFO L140 encePairwiseOnDemand]: 169/197 looper letters, 39 selfloop transitions, 1 changer transitions 23/186 dead transitions. [2023-11-30 05:16:51,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 186 transitions, 521 flow [2023-11-30 05:16:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:16:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:16:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-11-30 05:16:51,497 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8223350253807107 [2023-11-30 05:16:51,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-11-30 05:16:51,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-11-30 05:16:51,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:51,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-11-30 05:16:51,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 05:16:51,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 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 05:16:51,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 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 05:16:51,500 INFO L307 CegarLoopForPetriNet]: 176 programPoint places, -3 predicate places. [2023-11-30 05:16:51,500 INFO L500 AbstractCegarLoop]: Abstraction has has 173 places, 186 transitions, 521 flow [2023-11-30 05:16:51,500 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 05:16:51,500 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:51,500 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] [2023-11-30 05:16:51,500 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-30 05:16:51,500 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 05:16:51,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash -918004886, now seen corresponding path program 1 times [2023-11-30 05:16:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:51,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069576343] [2023-11-30 05:16:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:51,546 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 05:16:51,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:51,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069576343] [2023-11-30 05:16:51,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069576343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:16:51,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:16:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:16:51,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330829047] [2023-11-30 05:16:51,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:16:51,547 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:16:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:51,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:16:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:16:51,549 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 197 [2023-11-30 05:16:51,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 186 transitions, 521 flow. Second operand has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 05:16:51,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:51,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 197 [2023-11-30 05:16:51,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:55,218 INFO L124 PetriNetUnfolderBase]: 17432/42254 cut-off events. [2023-11-30 05:16:55,218 INFO L125 PetriNetUnfolderBase]: For 7153/7883 co-relation queries the response was YES. [2023-11-30 05:16:55,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90479 conditions, 42254 events. 17432/42254 cut-off events. For 7153/7883 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 482359 event pairs, 8953 based on Foata normal form. 0/40255 useless extension candidates. Maximal degree in co-relation 9770. Up to 21545 conditions per place. [2023-11-30 05:16:55,515 INFO L140 encePairwiseOnDemand]: 191/197 looper letters, 52 selfloop transitions, 3 changer transitions 41/214 dead transitions. [2023-11-30 05:16:55,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 214 transitions, 815 flow [2023-11-30 05:16:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:16:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:16:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2023-11-30 05:16:55,517 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7182741116751269 [2023-11-30 05:16:55,517 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2023-11-30 05:16:55,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2023-11-30 05:16:55,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:16:55,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2023-11-30 05:16:55,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 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 05:16:55,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 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 05:16:55,519 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 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 05:16:55,521 INFO L307 CegarLoopForPetriNet]: 176 programPoint places, 0 predicate places. [2023-11-30 05:16:55,521 INFO L500 AbstractCegarLoop]: Abstraction has has 176 places, 214 transitions, 815 flow [2023-11-30 05:16:55,521 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 05:16:55,522 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:16:55,522 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] [2023-11-30 05:16:55,522 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-30 05:16:55,522 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 05:16:55,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:16:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash 801496532, now seen corresponding path program 1 times [2023-11-30 05:16:55,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:16:55,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113358224] [2023-11-30 05:16:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:55,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:16:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:55,822 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 05:16:55,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:16:55,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113358224] [2023-11-30 05:16:55,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113358224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:16:55,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009134732] [2023-11-30 05:16:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:16:55,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:16:55,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:16:55,836 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 05:16:55,884 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 05:16:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:16:55,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:16:55,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:16:55,934 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 05:16:56,000 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 05:16:56,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:16:56,080 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 05:16:56,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009134732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:16:56,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:16:56,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-30 05:16:56,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304650286] [2023-11-30 05:16:56,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:16:56,081 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-30 05:16:56,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:16:56,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-30 05:16:56,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-30 05:16:56,083 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 197 [2023-11-30 05:16:56,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 214 transitions, 815 flow. Second operand has 11 states, 11 states have (on average 123.72727272727273) internal successors, (1361), 11 states have internal predecessors, (1361), 0 states have call successors, (0), 0 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 05:16:56,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:16:56,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 197 [2023-11-30 05:16:56,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:16:59,878 INFO L124 PetriNetUnfolderBase]: 18271/38965 cut-off events. [2023-11-30 05:16:59,879 INFO L125 PetriNetUnfolderBase]: For 20931/24381 co-relation queries the response was YES. [2023-11-30 05:16:59,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114750 conditions, 38965 events. 18271/38965 cut-off events. For 20931/24381 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 407538 event pairs, 623 based on Foata normal form. 3/36224 useless extension candidates. Maximal degree in co-relation 12073. Up to 22293 conditions per place. [2023-11-30 05:17:00,179 INFO L140 encePairwiseOnDemand]: 187/197 looper letters, 121 selfloop transitions, 11 changer transitions 41/290 dead transitions. [2023-11-30 05:17:00,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 290 transitions, 1593 flow [2023-11-30 05:17:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 05:17:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 05:17:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1366 transitions. [2023-11-30 05:17:00,184 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6934010152284263 [2023-11-30 05:17:00,184 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1366 transitions. [2023-11-30 05:17:00,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1366 transitions. [2023-11-30 05:17:00,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:17:00,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1366 transitions. [2023-11-30 05:17:00,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 136.6) internal successors, (1366), 10 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:00,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 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 05:17:00,191 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 197.0) internal successors, (2167), 11 states have internal predecessors, (2167), 0 states have call successors, (0), 0 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 05:17:00,191 INFO L307 CegarLoopForPetriNet]: 176 programPoint places, 9 predicate places. [2023-11-30 05:17:00,191 INFO L500 AbstractCegarLoop]: Abstraction has has 185 places, 290 transitions, 1593 flow [2023-11-30 05:17:00,192 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 123.72727272727273) internal successors, (1361), 11 states have internal predecessors, (1361), 0 states have call successors, (0), 0 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 05:17:00,192 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:17:00,192 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] [2023-11-30 05:17:00,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-30 05:17:00,396 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 05:17:00,399 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:17:00,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:17:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash 565036485, now seen corresponding path program 1 times [2023-11-30 05:17:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:17:00,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028129768] [2023-11-30 05:17:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:17:00,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:17:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:17:00,632 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 05:17:00,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:17:00,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028129768] [2023-11-30 05:17:00,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028129768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:17:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874541610] [2023-11-30 05:17:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:17:00,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:17:00,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:17:00,650 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 05:17:00,675 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 05:17:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:17:00,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-30 05:17:00,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:17:00,739 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 05:17:00,927 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 05:17:00,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:17:01,120 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 05:17:01,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874541610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:17:01,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:17:01,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-30 05:17:01,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355635883] [2023-11-30 05:17:01,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:17:01,123 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-30 05:17:01,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:17:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-30 05:17:01,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2023-11-30 05:17:01,125 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 197 [2023-11-30 05:17:01,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 290 transitions, 1593 flow. Second operand has 23 states, 23 states have (on average 123.8695652173913) internal successors, (2849), 23 states have internal predecessors, (2849), 0 states have call successors, (0), 0 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 05:17:01,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:17:01,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 197 [2023-11-30 05:17:01,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:17:02,749 INFO L124 PetriNetUnfolderBase]: 5491/11512 cut-off events. [2023-11-30 05:17:02,749 INFO L125 PetriNetUnfolderBase]: For 14457/16716 co-relation queries the response was YES. [2023-11-30 05:17:02,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41319 conditions, 11512 events. 5491/11512 cut-off events. For 14457/16716 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 101716 event pairs, 27 based on Foata normal form. 283/11636 useless extension candidates. Maximal degree in co-relation 4418. Up to 7466 conditions per place. [2023-11-30 05:17:02,841 INFO L140 encePairwiseOnDemand]: 190/197 looper letters, 161 selfloop transitions, 11 changer transitions 0/266 dead transitions. [2023-11-30 05:17:02,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 266 transitions, 1894 flow [2023-11-30 05:17:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-30 05:17:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-30 05:17:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1730 transitions. [2023-11-30 05:17:02,844 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6755173760249903 [2023-11-30 05:17:02,844 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1730 transitions. [2023-11-30 05:17:02,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1730 transitions. [2023-11-30 05:17:02,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:17:02,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1730 transitions. [2023-11-30 05:17:02,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.07692307692307) internal successors, (1730), 13 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:17:02,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 197.0) internal successors, (2758), 14 states have internal predecessors, (2758), 0 states have call successors, (0), 0 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 05:17:02,851 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 197.0) internal successors, (2758), 14 states have internal predecessors, (2758), 0 states have call successors, (0), 0 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 05:17:02,851 INFO L307 CegarLoopForPetriNet]: 176 programPoint places, -16 predicate places. [2023-11-30 05:17:02,851 INFO L500 AbstractCegarLoop]: Abstraction has has 160 places, 266 transitions, 1894 flow [2023-11-30 05:17:02,852 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 123.8695652173913) internal successors, (2849), 23 states have internal predecessors, (2849), 0 states have call successors, (0), 0 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 05:17:02,852 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:17:02,852 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] [2023-11-30 05:17:02,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-30 05:17:03,057 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 05:17:03,057 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:17:03,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:17:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash 336262605, now seen corresponding path program 1 times [2023-11-30 05:17:03,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:17:03,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854370449] [2023-11-30 05:17:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:17:03,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:17:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:17:03,091 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:17:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:17:03,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:17:03,113 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:17:03,113 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:17:03,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:17:03,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:17:03,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:17:03,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:17:03,114 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-30 05:17:03,114 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-30 05:17:03,115 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:17:03,115 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-30 05:17:03,136 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-30 05:17:03,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 230 transitions, 500 flow [2023-11-30 05:17:03,187 INFO L124 PetriNetUnfolderBase]: 87/664 cut-off events. [2023-11-30 05:17:03,187 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-30 05:17:03,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 664 events. 87/664 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2794 event pairs, 6 based on Foata normal form. 0/535 useless extension candidates. Maximal degree in co-relation 456. Up to 32 conditions per place. [2023-11-30 05:17:03,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 230 transitions, 500 flow [2023-11-30 05:17:03,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 230 transitions, 500 flow [2023-11-30 05:17:03,198 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:17:03,198 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;@125b68b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:17:03,198 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:17:03,200 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:17:03,201 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-11-30 05:17:03,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:17:03,201 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:17:03,201 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] [2023-11-30 05:17:03,201 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 05:17:03,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:17:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1368610601, now seen corresponding path program 1 times [2023-11-30 05:17:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:17:03,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780756193] [2023-11-30 05:17:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:17:03,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:17:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:17:03,227 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 05:17:03,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:17:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780756193] [2023-11-30 05:17:03,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780756193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:17:03,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:17:03,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:17:03,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011096179] [2023-11-30 05:17:03,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:17:03,228 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:17:03,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:17:03,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:17:03,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:17:03,229 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 230 [2023-11-30 05:17:03,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 230 transitions, 500 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 05:17:03,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:17:03,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 230 [2023-11-30 05:17:03,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:17:32,668 INFO L124 PetriNetUnfolderBase]: 128962/269411 cut-off events. [2023-11-30 05:17:32,668 INFO L125 PetriNetUnfolderBase]: For 10376/10376 co-relation queries the response was YES. [2023-11-30 05:17:34,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444091 conditions, 269411 events. 128962/269411 cut-off events. For 10376/10376 co-relation queries the response was YES. Maximal size of possible extension queue 5637. Compared 3448361 event pairs, 90828 based on Foata normal form. 100078/355477 useless extension candidates. Maximal degree in co-relation 50204. Up to 121191 conditions per place. [2023-11-30 05:17:35,218 INFO L140 encePairwiseOnDemand]: 196/230 looper letters, 47 selfloop transitions, 1 changer transitions 29/219 dead transitions. [2023-11-30 05:17:35,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 219 transitions, 628 flow [2023-11-30 05:17:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:17:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:17:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-11-30 05:17:35,220 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8246376811594203 [2023-11-30 05:17:35,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-11-30 05:17:35,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-11-30 05:17:35,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:17:35,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-11-30 05:17:35,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 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 05:17:35,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 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 05:17:35,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 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 05:17:35,223 INFO L307 CegarLoopForPetriNet]: 204 programPoint places, -3 predicate places. [2023-11-30 05:17:35,223 INFO L500 AbstractCegarLoop]: Abstraction has has 201 places, 219 transitions, 628 flow [2023-11-30 05:17:35,223 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 05:17:35,223 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:17:35,223 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] [2023-11-30 05:17:35,223 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-30 05:17:35,223 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 05:17:35,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:17:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1368610602, now seen corresponding path program 1 times [2023-11-30 05:17:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:17:35,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115119503] [2023-11-30 05:17:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:17:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:17:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:17:35,274 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 05:17:35,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:17:35,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115119503] [2023-11-30 05:17:35,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115119503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:17:35,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:17:35,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:17:35,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392234703] [2023-11-30 05:17:35,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:17:35,275 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:17:35,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:17:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:17:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:17:35,276 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 230 [2023-11-30 05:17:35,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 219 transitions, 628 flow. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 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 05:17:35,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:17:35,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 230 [2023-11-30 05:17:35,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:18:14,745 INFO L124 PetriNetUnfolderBase]: 174885/362401 cut-off events. [2023-11-30 05:18:14,745 INFO L125 PetriNetUnfolderBase]: For 58716/64696 co-relation queries the response was YES. [2023-11-30 05:18:16,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813517 conditions, 362401 events. 174885/362401 cut-off events. For 58716/64696 co-relation queries the response was YES. Maximal size of possible extension queue 7218. Compared 4761279 event pairs, 100902 based on Foata normal form. 0/347451 useless extension candidates. Maximal degree in co-relation 91649. Up to 197767 conditions per place. [2023-11-30 05:18:18,935 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 60 selfloop transitions, 3 changer transitions 53/253 dead transitions. [2023-11-30 05:18:18,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 253 transitions, 986 flow [2023-11-30 05:18:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:18:18,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:18:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 656 transitions. [2023-11-30 05:18:18,944 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7130434782608696 [2023-11-30 05:18:18,944 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 656 transitions. [2023-11-30 05:18:18,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 656 transitions. [2023-11-30 05:18:18,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:18:18,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 656 transitions. [2023-11-30 05:18:18,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 05:18:18,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 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 05:18:18,947 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 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 05:18:18,948 INFO L307 CegarLoopForPetriNet]: 204 programPoint places, 0 predicate places. [2023-11-30 05:18:18,948 INFO L500 AbstractCegarLoop]: Abstraction has has 204 places, 253 transitions, 986 flow [2023-11-30 05:18:18,948 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 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 05:18:18,948 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:18:18,948 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] [2023-11-30 05:18:18,948 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-30 05:18:18,948 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 05:18:18,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:18:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -9663467, now seen corresponding path program 1 times [2023-11-30 05:18:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:18:18,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704798089] [2023-11-30 05:18:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:18:18,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:18:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:18:19,133 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 05:18:19,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:18:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704798089] [2023-11-30 05:18:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704798089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:18:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823148369] [2023-11-30 05:18:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:18:19,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:18:19,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:18:19,152 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 05:18:19,212 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 05:18:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:18:19,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:18:19,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:18:19,294 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 05:18:19,348 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 05:18:19,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:18:19,415 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 05:18:19,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823148369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:18:19,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:18:19,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-30 05:18:19,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577995944] [2023-11-30 05:18:19,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:18:19,432 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-30 05:18:19,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:18:19,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-30 05:18:19,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-30 05:18:19,434 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 230 [2023-11-30 05:18:19,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 253 transitions, 986 flow. Second operand has 11 states, 11 states have (on average 142.72727272727272) internal successors, (1570), 11 states have internal predecessors, (1570), 0 states have call successors, (0), 0 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 05:18:19,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:18:19,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 230 [2023-11-30 05:18:19,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:09,030 INFO L124 PetriNetUnfolderBase]: 183368/342512 cut-off events. [2023-11-30 05:19:09,030 INFO L125 PetriNetUnfolderBase]: For 171641/199070 co-relation queries the response was YES. [2023-11-30 05:19:10,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051301 conditions, 342512 events. 183368/342512 cut-off events. For 171641/199070 co-relation queries the response was YES. Maximal size of possible extension queue 6718. Compared 4085788 event pairs, 11047 based on Foata normal form. 3/320892 useless extension candidates. Maximal degree in co-relation 116385. Up to 205865 conditions per place. [2023-11-30 05:19:13,052 INFO L140 encePairwiseOnDemand]: 220/230 looper letters, 135 selfloop transitions, 11 changer transitions 53/335 dead transitions. [2023-11-30 05:19:13,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 335 transitions, 1852 flow [2023-11-30 05:19:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 05:19:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 05:19:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1576 transitions. [2023-11-30 05:19:13,055 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6852173913043478 [2023-11-30 05:19:13,055 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1576 transitions. [2023-11-30 05:19:13,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1576 transitions. [2023-11-30 05:19:13,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:13,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1576 transitions. [2023-11-30 05:19:13,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 157.6) internal successors, (1576), 10 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 05:19:13,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 230.0) internal successors, (2530), 11 states have internal predecessors, (2530), 0 states have call successors, (0), 0 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 05:19:13,061 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 230.0) internal successors, (2530), 11 states have internal predecessors, (2530), 0 states have call successors, (0), 0 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 05:19:13,061 INFO L307 CegarLoopForPetriNet]: 204 programPoint places, 9 predicate places. [2023-11-30 05:19:13,061 INFO L500 AbstractCegarLoop]: Abstraction has has 213 places, 335 transitions, 1852 flow [2023-11-30 05:19:13,062 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 142.72727272727272) internal successors, (1570), 11 states have internal predecessors, (1570), 0 states have call successors, (0), 0 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 05:19:13,062 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:13,062 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] [2023-11-30 05:19:13,094 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 05:19:13,297 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,SelfDestructingSolverStorable15 [2023-11-30 05:19:13,297 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:19:13,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:13,298 INFO L85 PathProgramCache]: Analyzing trace with hash -837148344, now seen corresponding path program 1 times [2023-11-30 05:19:13,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:13,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656650028] [2023-11-30 05:19:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:13,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:13,467 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 05:19:13,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656650028] [2023-11-30 05:19:13,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656650028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:19:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580211599] [2023-11-30 05:19:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:19:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:19:13,486 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 05:19:13,486 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 05:19:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:13,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-30 05:19:13,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:19:13,574 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 05:19:13,771 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 05:19:13,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:19:13,951 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 05:19:13,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580211599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:19:13,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:19:13,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-11-30 05:19:13,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372058084] [2023-11-30 05:19:13,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:19:13,952 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-30 05:19:13,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-30 05:19:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-11-30 05:19:13,954 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 230 [2023-11-30 05:19:13,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 335 transitions, 1852 flow. Second operand has 27 states, 27 states have (on average 142.66666666666666) internal successors, (3852), 27 states have internal predecessors, (3852), 0 states have call successors, (0), 0 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 05:19:13,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:13,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 230 [2023-11-30 05:19:13,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:19:25,079 INFO L124 PetriNetUnfolderBase]: 52825/96811 cut-off events. [2023-11-30 05:19:25,079 INFO L125 PetriNetUnfolderBase]: For 114666/133685 co-relation queries the response was YES. [2023-11-30 05:19:25,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363289 conditions, 96811 events. 52825/96811 cut-off events. For 114666/133685 co-relation queries the response was YES. Maximal size of possible extension queue 2440. Compared 996685 event pairs, 1176 based on Foata normal form. 1469/97191 useless extension candidates. Maximal degree in co-relation 41595. Up to 66805 conditions per place. [2023-11-30 05:19:26,121 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 266 selfloop transitions, 14 changer transitions 0/393 dead transitions. [2023-11-30 05:19:26,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 393 transitions, 3012 flow [2023-11-30 05:19:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-30 05:19:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-30 05:19:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2483 transitions. [2023-11-30 05:19:26,126 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6747282608695652 [2023-11-30 05:19:26,126 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2483 transitions. [2023-11-30 05:19:26,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2483 transitions. [2023-11-30 05:19:26,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:19:26,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2483 transitions. [2023-11-30 05:19:26,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 155.1875) internal successors, (2483), 16 states have internal predecessors, (2483), 0 states have call successors, (0), 0 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 05:19:26,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 230.0) internal successors, (3910), 17 states have internal predecessors, (3910), 0 states have call successors, (0), 0 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 05:19:26,134 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 230.0) internal successors, (3910), 17 states have internal predecessors, (3910), 0 states have call successors, (0), 0 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 05:19:26,134 INFO L307 CegarLoopForPetriNet]: 204 programPoint places, -13 predicate places. [2023-11-30 05:19:26,135 INFO L500 AbstractCegarLoop]: Abstraction has has 191 places, 393 transitions, 3012 flow [2023-11-30 05:19:26,136 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 142.66666666666666) internal successors, (3852), 27 states have internal predecessors, (3852), 0 states have call successors, (0), 0 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 05:19:26,136 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:26,136 INFO L232 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:19:26,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-30 05:19:26,617 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-30 05:19:26,618 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-30 05:19:26,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1406888423, now seen corresponding path program 1 times [2023-11-30 05:19:26,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:26,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391612606] [2023-11-30 05:19:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:26,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:19:26,634 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:19:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:19:26,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:19:26,654 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:19:26,654 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-30 05:19:26,654 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-30 05:19:26,654 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-30 05:19:26,654 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-30 05:19:26,654 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-11-30 05:19:26,655 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-30 05:19:26,655 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-30 05:19:26,655 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:19:26,655 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-30 05:19:26,674 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-30 05:19:26,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 263 transitions, 581 flow [2023-11-30 05:19:26,758 INFO L124 PetriNetUnfolderBase]: 147/1056 cut-off events. [2023-11-30 05:19:26,758 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-30 05:19:26,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 1056 events. 147/1056 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5242 event pairs, 23 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 709. Up to 80 conditions per place. [2023-11-30 05:19:26,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 263 transitions, 581 flow [2023-11-30 05:19:26,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 263 transitions, 581 flow [2023-11-30 05:19:26,773 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:19:26,773 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;@125b68b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:19:26,773 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-30 05:19:26,775 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:19:26,775 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-11-30 05:19:26,775 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:19:26,775 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:19:26,775 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] [2023-11-30 05:19:26,775 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 05:19:26,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:19:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1133307511, now seen corresponding path program 1 times [2023-11-30 05:19:26,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:19:26,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645914935] [2023-11-30 05:19:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:19:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:19:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:19:26,801 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 05:19:26,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:19:26,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645914935] [2023-11-30 05:19:26,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645914935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:19:26,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:19:26,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:19:26,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985267601] [2023-11-30 05:19:26,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:19:26,802 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:19:26,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:19:26,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:19:26,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:19:26,803 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 263 [2023-11-30 05:19:26,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 263 transitions, 581 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 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 05:19:26,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:19:26,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 263 [2023-11-30 05:19:26,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand