/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/pthread/queue_longest.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 04:00:46,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 04:00:46,823 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 04:00:46,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 04:00:46,847 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 04:00:46,848 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 04:00:46,848 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 04:00:46,848 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 04:00:46,849 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 04:00:46,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 04:00:46,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 04:00:46,852 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 04:00:46,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 04:00:46,853 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 04:00:46,853 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 04:00:46,853 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 04:00:46,854 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 04:00:46,854 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 04:00:46,854 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 04:00:46,854 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 04:00:46,854 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 04:00:46,855 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 04:00:46,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 04:00:46,855 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 04:00:46,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 04:00:46,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 04:00:46,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 04:00:46,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 04:00:46,856 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 04:00:46,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 04:00:46,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 04:00:46,857 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 04:00:46,857 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 04:00:46,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 04:00:47,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 04:00:47,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 04:00:47,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 04:00:47,186 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 04:00:47,186 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 04:00:47,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longest.i [2023-11-30 04:00:48,340 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 04:00:48,555 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 04:00:48,555 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i [2023-11-30 04:00:48,566 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7738c3c29/647ed5c23b0a4461a1c3481db9b93fc7/FLAGf264992c9 [2023-11-30 04:00:48,576 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7738c3c29/647ed5c23b0a4461a1c3481db9b93fc7 [2023-11-30 04:00:48,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 04:00:48,578 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 04:00:48,579 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 04:00:48,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 04:00:48,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 04:00:48,583 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 04:00:48" (1/1) ... [2023-11-30 04:00:48,584 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e5704c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:48, skipping insertion in model container [2023-11-30 04:00:48,584 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 04:00:48" (1/1) ... [2023-11-30 04:00:48,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 04:00:48,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 04:00:48,937 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 04:00:48,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 04:00:49,023 INFO L206 MainTranslator]: Completed translation [2023-11-30 04:00:49,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49 WrapperNode [2023-11-30 04:00:49,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 04:00:49,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 04:00:49,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 04:00:49,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 04:00:49,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,087 INFO L138 Inliner]: procedures = 275, calls = 66, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 260 [2023-11-30 04:00:49,088 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 04:00:49,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 04:00:49,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 04:00:49,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 04:00:49,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,108 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,108 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,115 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,122 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,124 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,126 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 04:00:49,127 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 04:00:49,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 04:00:49,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 04:00:49,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (1/1) ... [2023-11-30 04:00:49,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 04:00:49,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:00:49,178 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 04:00:49,189 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 04:00:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-30 04:00:49,212 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-30 04:00:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-30 04:00:49,212 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-30 04:00:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 04:00:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 04:00:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-30 04:00:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 04:00:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 04:00:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-30 04:00:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 04:00:49,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 04:00:49,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 04:00:49,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 04:00:49,215 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 04:00:49,389 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 04:00:49,391 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 04:00:49,836 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 04:00:49,850 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 04:00:49,851 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-30 04:00:49,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 04:00:49 BoogieIcfgContainer [2023-11-30 04:00:49,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 04:00:49,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 04:00:49,853 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 04:00:49,855 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 04:00:49,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 04:00:48" (1/3) ... [2023-11-30 04:00:49,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ab7a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 04:00:49, skipping insertion in model container [2023-11-30 04:00:49,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:49" (2/3) ... [2023-11-30 04:00:49,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ab7a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 04:00:49, skipping insertion in model container [2023-11-30 04:00:49,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 04:00:49" (3/3) ... [2023-11-30 04:00:49,857 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2023-11-30 04:00:49,868 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 04:00:49,869 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 76 error locations. [2023-11-30 04:00:49,869 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 04:00:49,943 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-30 04:00:49,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 350 places, 361 transitions, 736 flow [2023-11-30 04:00:50,072 INFO L124 PetriNetUnfolderBase]: 18/359 cut-off events. [2023-11-30 04:00:50,072 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-30 04:00:50,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 359 events. 18/359 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 786 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 264. Up to 2 conditions per place. [2023-11-30 04:00:50,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 350 places, 361 transitions, 736 flow [2023-11-30 04:00:50,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 338 places, 349 transitions, 707 flow [2023-11-30 04:00:50,106 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 04:00:50,113 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;@3165f4b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 04:00:50,113 INFO L363 AbstractCegarLoop]: Starting to check reachability of 136 error locations. [2023-11-30 04:00:50,119 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 04:00:50,119 INFO L124 PetriNetUnfolderBase]: 0/31 cut-off events. [2023-11-30 04:00:50,119 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:00:50,120 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:50,120 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] [2023-11-30 04:00:50,120 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:00:50,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash -817170261, now seen corresponding path program 1 times [2023-11-30 04:00:50,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:50,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952905397] [2023-11-30 04:00:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:50,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:50,600 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 04:00:50,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:50,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952905397] [2023-11-30 04:00:50,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952905397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:50,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:50,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:00:50,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308565350] [2023-11-30 04:00:50,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:50,608 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:00:50,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:50,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:00:50,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:00:50,635 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 361 [2023-11-30 04:00:50,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 349 transitions, 707 flow. Second operand has 7 states, 7 states have (on average 240.0) internal successors, (1680), 7 states have internal predecessors, (1680), 0 states have call successors, (0), 0 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 04:00:50,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:50,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 361 [2023-11-30 04:00:50,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:52,886 INFO L124 PetriNetUnfolderBase]: 5809/16873 cut-off events. [2023-11-30 04:00:52,886 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-11-30 04:00:52,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25820 conditions, 16873 events. 5809/16873 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 173700 event pairs, 5275 based on Foata normal form. 695/13098 useless extension candidates. Maximal degree in co-relation 25385. Up to 8807 conditions per place. [2023-11-30 04:00:52,983 INFO L140 encePairwiseOnDemand]: 345/361 looper letters, 99 selfloop transitions, 6 changer transitions 0/325 dead transitions. [2023-11-30 04:00:52,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 325 transitions, 869 flow [2023-11-30 04:00:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:00:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:00:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1543 transitions. [2023-11-30 04:00:52,995 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7123730378578024 [2023-11-30 04:00:52,995 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1543 transitions. [2023-11-30 04:00:52,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1543 transitions. [2023-11-30 04:00:52,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:52,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1543 transitions. [2023-11-30 04:00:53,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 257.1666666666667) internal successors, (1543), 6 states have internal predecessors, (1543), 0 states have call successors, (0), 0 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 04:00:53,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 04:00:53,009 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 04:00:53,012 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, -11 predicate places. [2023-11-30 04:00:53,012 INFO L500 AbstractCegarLoop]: Abstraction has has 327 places, 325 transitions, 869 flow [2023-11-30 04:00:53,013 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 240.0) internal successors, (1680), 7 states have internal predecessors, (1680), 0 states have call successors, (0), 0 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 04:00:53,013 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:53,013 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] [2023-11-30 04:00:53,013 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 04:00:53,013 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:00:53,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:53,014 INFO L85 PathProgramCache]: Analyzing trace with hash -817170260, now seen corresponding path program 1 times [2023-11-30 04:00:53,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:53,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471373427] [2023-11-30 04:00:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:53,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:53,183 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 04:00:53,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471373427] [2023-11-30 04:00:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471373427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:53,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:53,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:00:53,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772854120] [2023-11-30 04:00:53,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:53,185 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:00:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:00:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:00:53,187 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 361 [2023-11-30 04:00:53,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 325 transitions, 869 flow. Second operand has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 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 04:00:53,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:53,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 361 [2023-11-30 04:00:53,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:56,683 INFO L124 PetriNetUnfolderBase]: 15728/36043 cut-off events. [2023-11-30 04:00:56,683 INFO L125 PetriNetUnfolderBase]: For 5208/6100 co-relation queries the response was YES. [2023-11-30 04:00:56,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76713 conditions, 36043 events. 15728/36043 cut-off events. For 5208/6100 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 383936 event pairs, 14749 based on Foata normal form. 0/27492 useless extension candidates. Maximal degree in co-relation 75845. Up to 23862 conditions per place. [2023-11-30 04:00:57,027 INFO L140 encePairwiseOnDemand]: 352/361 looper letters, 131 selfloop transitions, 6 changer transitions 0/322 dead transitions. [2023-11-30 04:00:57,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 322 transitions, 1131 flow [2023-11-30 04:00:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:00:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:00:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1358 transitions. [2023-11-30 04:00:57,058 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6269621421975993 [2023-11-30 04:00:57,059 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1358 transitions. [2023-11-30 04:00:57,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1358 transitions. [2023-11-30 04:00:57,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:57,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1358 transitions. [2023-11-30 04:00:57,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.33333333333334) internal successors, (1358), 6 states have internal predecessors, (1358), 0 states have call successors, (0), 0 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 04:00:57,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 04:00:57,065 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 04:00:57,066 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, -9 predicate places. [2023-11-30 04:00:57,066 INFO L500 AbstractCegarLoop]: Abstraction has has 329 places, 322 transitions, 1131 flow [2023-11-30 04:00:57,067 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 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 04:00:57,067 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:57,067 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] [2023-11-30 04:00:57,068 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 04:00:57,068 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:00:57,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1873921761, now seen corresponding path program 1 times [2023-11-30 04:00:57,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:57,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837838883] [2023-11-30 04:00:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:57,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:57,578 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 04:00:57,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:57,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837838883] [2023-11-30 04:00:57,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837838883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:57,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:57,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 04:00:57,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882005835] [2023-11-30 04:00:57,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:57,580 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 04:00:57,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 04:00:57,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-30 04:00:57,585 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 361 [2023-11-30 04:00:57,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 322 transitions, 1131 flow. Second operand has 8 states, 8 states have (on average 237.625) internal successors, (1901), 8 states have internal predecessors, (1901), 0 states have call successors, (0), 0 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 04:00:57,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:57,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 361 [2023-11-30 04:00:57,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:01,789 INFO L124 PetriNetUnfolderBase]: 15728/36041 cut-off events. [2023-11-30 04:01:01,790 INFO L125 PetriNetUnfolderBase]: For 21155/24341 co-relation queries the response was YES. [2023-11-30 04:01:01,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93334 conditions, 36041 events. 15728/36041 cut-off events. For 21155/24341 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 383758 event pairs, 14749 based on Foata normal form. 2/34599 useless extension candidates. Maximal degree in co-relation 92259. Up to 23860 conditions per place. [2023-11-30 04:01:02,010 INFO L140 encePairwiseOnDemand]: 349/361 looper letters, 95 selfloop transitions, 10 changer transitions 0/320 dead transitions. [2023-11-30 04:01:02,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 320 transitions, 1333 flow [2023-11-30 04:01:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 04:01:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 04:01:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2457 transitions. [2023-11-30 04:01:02,014 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6806094182825485 [2023-11-30 04:01:02,014 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2457 transitions. [2023-11-30 04:01:02,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2457 transitions. [2023-11-30 04:01:02,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:02,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2457 transitions. [2023-11-30 04:01:02,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 245.7) internal successors, (2457), 10 states have internal predecessors, (2457), 0 states have call successors, (0), 0 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 04:01:02,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 361.0) internal successors, (3971), 11 states have internal predecessors, (3971), 0 states have call successors, (0), 0 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 04:01:02,024 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 361.0) internal successors, (3971), 11 states have internal predecessors, (3971), 0 states have call successors, (0), 0 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 04:01:02,024 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, -2 predicate places. [2023-11-30 04:01:02,024 INFO L500 AbstractCegarLoop]: Abstraction has has 336 places, 320 transitions, 1333 flow [2023-11-30 04:01:02,025 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 237.625) internal successors, (1901), 8 states have internal predecessors, (1901), 0 states have call successors, (0), 0 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 04:01:02,025 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:02,025 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] [2023-11-30 04:01:02,025 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-30 04:01:02,026 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:02,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1873921760, now seen corresponding path program 1 times [2023-11-30 04:01:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:02,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541890821] [2023-11-30 04:01:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:02,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:02,094 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 04:01:02,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:02,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541890821] [2023-11-30 04:01:02,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541890821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:02,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:02,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 04:01:02,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358044713] [2023-11-30 04:01:02,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:02,098 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 04:01:02,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:02,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 04:01:02,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-30 04:01:02,101 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 361 [2023-11-30 04:01:02,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 320 transitions, 1333 flow. Second operand has 8 states, 8 states have (on average 234.75) internal successors, (1878), 8 states have internal predecessors, (1878), 0 states have call successors, (0), 0 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 04:01:02,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:02,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 361 [2023-11-30 04:01:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:05,649 INFO L124 PetriNetUnfolderBase]: 15728/36039 cut-off events. [2023-11-30 04:01:05,656 INFO L125 PetriNetUnfolderBase]: For 41949/46844 co-relation queries the response was YES. [2023-11-30 04:01:05,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109950 conditions, 36039 events. 15728/36039 cut-off events. For 41949/46844 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 384197 event pairs, 14749 based on Foata normal form. 0/34597 useless extension candidates. Maximal degree in co-relation 108673. Up to 23858 conditions per place. [2023-11-30 04:01:05,897 INFO L140 encePairwiseOnDemand]: 350/361 looper letters, 95 selfloop transitions, 9 changer transitions 0/318 dead transitions. [2023-11-30 04:01:05,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 318 transitions, 1525 flow [2023-11-30 04:01:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-30 04:01:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-30 04:01:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2194 transitions. [2023-11-30 04:01:05,917 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.675284702985534 [2023-11-30 04:01:05,917 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2194 transitions. [2023-11-30 04:01:05,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2194 transitions. [2023-11-30 04:01:05,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:05,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2194 transitions. [2023-11-30 04:01:05,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 243.77777777777777) internal successors, (2194), 9 states have internal predecessors, (2194), 0 states have call successors, (0), 0 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 04:01:05,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 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 04:01:05,925 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 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 04:01:05,926 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 4 predicate places. [2023-11-30 04:01:05,926 INFO L500 AbstractCegarLoop]: Abstraction has has 342 places, 318 transitions, 1525 flow [2023-11-30 04:01:05,927 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 234.75) internal successors, (1878), 8 states have internal predecessors, (1878), 0 states have call successors, (0), 0 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 04:01:05,927 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:05,927 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:01:05,927 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 04:01:05,927 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:05,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash 376553368, now seen corresponding path program 1 times [2023-11-30 04:01:05,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:05,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39021451] [2023-11-30 04:01:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:05,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:06,062 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 04:01:06,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:06,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39021451] [2023-11-30 04:01:06,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39021451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:06,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:06,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:01:06,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665014067] [2023-11-30 04:01:06,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:06,063 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:01:06,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:06,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:01:06,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:01:06,064 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 361 [2023-11-30 04:01:06,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 318 transitions, 1525 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 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 04:01:06,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:06,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 361 [2023-11-30 04:01:06,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:09,160 INFO L124 PetriNetUnfolderBase]: 11375/26843 cut-off events. [2023-11-30 04:01:09,161 INFO L125 PetriNetUnfolderBase]: For 57056/61285 co-relation queries the response was YES. [2023-11-30 04:01:09,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94544 conditions, 26843 events. 11375/26843 cut-off events. For 57056/61285 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 278531 event pairs, 10632 based on Foata normal form. 2106/27858 useless extension candidates. Maximal degree in co-relation 93076. Up to 17564 conditions per place. [2023-11-30 04:01:09,332 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 88 selfloop transitions, 1 changer transitions 0/316 dead transitions. [2023-11-30 04:01:09,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 316 transitions, 1687 flow [2023-11-30 04:01:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:01:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:01:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2023-11-30 04:01:09,334 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7710064635272391 [2023-11-30 04:01:09,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2023-11-30 04:01:09,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2023-11-30 04:01:09,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:09,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2023-11-30 04:01:09,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 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 04:01:09,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:09,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:09,338 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 4 predicate places. [2023-11-30 04:01:09,338 INFO L500 AbstractCegarLoop]: Abstraction has has 342 places, 316 transitions, 1687 flow [2023-11-30 04:01:09,338 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 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 04:01:09,338 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:09,339 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:01:09,339 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-30 04:01:09,339 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:09,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:09,339 INFO L85 PathProgramCache]: Analyzing trace with hash 376553369, now seen corresponding path program 1 times [2023-11-30 04:01:09,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:09,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474289699] [2023-11-30 04:01:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:09,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:09,760 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 04:01:09,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:09,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474289699] [2023-11-30 04:01:09,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474289699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:09,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:09,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-30 04:01:09,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065534635] [2023-11-30 04:01:09,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:09,765 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-30 04:01:09,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:09,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-30 04:01:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-30 04:01:09,767 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 361 [2023-11-30 04:01:09,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 316 transitions, 1687 flow. Second operand has 12 states, 12 states have (on average 263.3333333333333) internal successors, (3160), 12 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 04:01:09,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:09,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 361 [2023-11-30 04:01:09,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:12,984 INFO L124 PetriNetUnfolderBase]: 11374/26839 cut-off events. [2023-11-30 04:01:12,984 INFO L125 PetriNetUnfolderBase]: For 74437/78931 co-relation queries the response was YES. [2023-11-30 04:01:13,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102194 conditions, 26839 events. 11374/26839 cut-off events. For 74437/78931 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 278196 event pairs, 10632 based on Foata normal form. 0/25749 useless extension candidates. Maximal degree in co-relation 100585. Up to 17564 conditions per place. [2023-11-30 04:01:13,165 INFO L140 encePairwiseOnDemand]: 344/361 looper letters, 58 selfloop transitions, 16 changer transitions 0/312 dead transitions. [2023-11-30 04:01:13,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 312 transitions, 1827 flow [2023-11-30 04:01:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-30 04:01:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-30 04:01:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3207 transitions. [2023-11-30 04:01:13,170 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7403047091412742 [2023-11-30 04:01:13,171 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3207 transitions. [2023-11-30 04:01:13,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3207 transitions. [2023-11-30 04:01:13,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:13,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3207 transitions. [2023-11-30 04:01:13,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 267.25) internal successors, (3207), 12 states have internal predecessors, (3207), 0 states have call successors, (0), 0 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 04:01:13,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 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 04:01:13,182 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 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 04:01:13,182 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 12 predicate places. [2023-11-30 04:01:13,182 INFO L500 AbstractCegarLoop]: Abstraction has has 350 places, 312 transitions, 1827 flow [2023-11-30 04:01:13,183 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 263.3333333333333) internal successors, (3160), 12 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 04:01:13,183 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:13,183 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:01:13,183 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-30 04:01:13,183 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:13,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:13,184 INFO L85 PathProgramCache]: Analyzing trace with hash 534413854, now seen corresponding path program 1 times [2023-11-30 04:01:13,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:13,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463724733] [2023-11-30 04:01:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:13,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:13,274 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 04:01:13,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:13,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463724733] [2023-11-30 04:01:13,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463724733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:13,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:13,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 04:01:13,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081617198] [2023-11-30 04:01:13,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:13,278 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 04:01:13,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:13,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 04:01:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 04:01:13,280 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 361 [2023-11-30 04:01:13,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 312 transitions, 1827 flow. Second operand has 4 states, 4 states have (on average 215.75) internal successors, (863), 4 states have internal predecessors, (863), 0 states have call successors, (0), 0 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 04:01:13,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:13,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 361 [2023-11-30 04:01:13,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:15,291 INFO L124 PetriNetUnfolderBase]: 7021/17643 cut-off events. [2023-11-30 04:01:15,291 INFO L125 PetriNetUnfolderBase]: For 71730/76108 co-relation queries the response was YES. [2023-11-30 04:01:15,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80053 conditions, 17643 events. 7021/17643 cut-off events. For 71730/76108 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 175901 event pairs, 6515 based on Foata normal form. 2106/19010 useless extension candidates. Maximal degree in co-relation 78187. Up to 11270 conditions per place. [2023-11-30 04:01:15,408 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 117 selfloop transitions, 1 changer transitions 0/310 dead transitions. [2023-11-30 04:01:15,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 310 transitions, 2047 flow [2023-11-30 04:01:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:01:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:01:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 756 transitions. [2023-11-30 04:01:15,410 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6980609418282548 [2023-11-30 04:01:15,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 756 transitions. [2023-11-30 04:01:15,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 756 transitions. [2023-11-30 04:01:15,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:15,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 756 transitions. [2023-11-30 04:01:15,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 04:01:15,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:15,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:15,414 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 12 predicate places. [2023-11-30 04:01:15,414 INFO L500 AbstractCegarLoop]: Abstraction has has 350 places, 310 transitions, 2047 flow [2023-11-30 04:01:15,414 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.75) internal successors, (863), 4 states have internal predecessors, (863), 0 states have call successors, (0), 0 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 04:01:15,414 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:15,415 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:01:15,415 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-30 04:01:15,415 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:15,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1360809092, now seen corresponding path program 1 times [2023-11-30 04:01:15,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:15,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955702687] [2023-11-30 04:01:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:15,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:15,456 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 04:01:15,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955702687] [2023-11-30 04:01:15,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955702687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:15,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:15,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:01:15,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410192263] [2023-11-30 04:01:15,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:15,457 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:01:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:01:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:01:15,458 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 361 [2023-11-30 04:01:15,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 310 transitions, 2047 flow. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 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 04:01:15,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:15,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 361 [2023-11-30 04:01:15,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:17,916 INFO L124 PetriNetUnfolderBase]: 6917/17355 cut-off events. [2023-11-30 04:01:17,917 INFO L125 PetriNetUnfolderBase]: For 94761/99753 co-relation queries the response was YES. [2023-11-30 04:01:17,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86961 conditions, 17355 events. 6917/17355 cut-off events. For 94761/99753 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 172669 event pairs, 6418 based on Foata normal form. 98/16722 useless extension candidates. Maximal degree in co-relation 85300. Up to 11073 conditions per place. [2023-11-30 04:01:18,045 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 86 selfloop transitions, 1 changer transitions 0/308 dead transitions. [2023-11-30 04:01:18,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 308 transitions, 2197 flow [2023-11-30 04:01:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:01:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:01:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 833 transitions. [2023-11-30 04:01:18,051 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7691597414589104 [2023-11-30 04:01:18,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 833 transitions. [2023-11-30 04:01:18,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 833 transitions. [2023-11-30 04:01:18,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:18,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 833 transitions. [2023-11-30 04:01:18,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.6666666666667) internal successors, (833), 3 states have internal predecessors, (833), 0 states have call successors, (0), 0 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 04:01:18,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:18,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:18,091 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 12 predicate places. [2023-11-30 04:01:18,091 INFO L500 AbstractCegarLoop]: Abstraction has has 350 places, 308 transitions, 2197 flow [2023-11-30 04:01:18,091 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 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 04:01:18,091 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:18,091 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:01:18,092 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-30 04:01:18,092 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:18,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1360809093, now seen corresponding path program 1 times [2023-11-30 04:01:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:18,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353125033] [2023-11-30 04:01:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:18,219 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 04:01:18,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:18,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353125033] [2023-11-30 04:01:18,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353125033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:18,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:18,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:01:18,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454036724] [2023-11-30 04:01:18,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:18,221 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:01:18,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:01:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:01:18,222 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 361 [2023-11-30 04:01:18,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 308 transitions, 2197 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 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 04:01:18,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:18,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 361 [2023-11-30 04:01:18,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:20,246 INFO L124 PetriNetUnfolderBase]: 6813/17067 cut-off events. [2023-11-30 04:01:20,246 INFO L125 PetriNetUnfolderBase]: For 114097/119762 co-relation queries the response was YES. [2023-11-30 04:01:20,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93738 conditions, 17067 events. 6813/17067 cut-off events. For 114097/119762 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 169059 event pairs, 6321 based on Foata normal form. 98/16442 useless extension candidates. Maximal degree in co-relation 92325. Up to 10876 conditions per place. [2023-11-30 04:01:20,383 INFO L140 encePairwiseOnDemand]: 358/361 looper letters, 83 selfloop transitions, 1 changer transitions 0/306 dead transitions. [2023-11-30 04:01:20,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 306 transitions, 2345 flow [2023-11-30 04:01:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:01:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:01:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2023-11-30 04:01:20,385 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7719298245614035 [2023-11-30 04:01:20,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2023-11-30 04:01:20,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2023-11-30 04:01:20,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:20,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2023-11-30 04:01:20,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 04:01:20,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:20,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:20,390 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 12 predicate places. [2023-11-30 04:01:20,390 INFO L500 AbstractCegarLoop]: Abstraction has has 350 places, 306 transitions, 2345 flow [2023-11-30 04:01:20,390 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 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 04:01:20,390 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:20,390 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:20,390 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-30 04:01:20,390 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:20,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:20,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1136486198, now seen corresponding path program 1 times [2023-11-30 04:01:20,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:20,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091192604] [2023-11-30 04:01:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:20,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:20,477 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 04:01:20,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:20,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091192604] [2023-11-30 04:01:20,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091192604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:20,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:20,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 04:01:20,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142112111] [2023-11-30 04:01:20,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:20,479 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 04:01:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 04:01:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-30 04:01:20,481 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 361 [2023-11-30 04:01:20,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 306 transitions, 2345 flow. Second operand has 8 states, 8 states have (on average 217.5) internal successors, (1740), 8 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 04:01:20,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:20,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 361 [2023-11-30 04:01:20,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:23,047 INFO L124 PetriNetUnfolderBase]: 5856/14624 cut-off events. [2023-11-30 04:01:23,047 INFO L125 PetriNetUnfolderBase]: For 149381/150464 co-relation queries the response was YES. [2023-11-30 04:01:23,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86740 conditions, 14624 events. 5856/14624 cut-off events. For 149381/150464 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 139726 event pairs, 2449 based on Foata normal form. 1015/15122 useless extension candidates. Maximal degree in co-relation 85197. Up to 8914 conditions per place. [2023-11-30 04:01:23,178 INFO L140 encePairwiseOnDemand]: 332/361 looper letters, 139 selfloop transitions, 13 changer transitions 0/338 dead transitions. [2023-11-30 04:01:23,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 338 transitions, 3267 flow [2023-11-30 04:01:23,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-30 04:01:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-30 04:01:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2094 transitions. [2023-11-30 04:01:23,196 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.644506001846722 [2023-11-30 04:01:23,196 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2094 transitions. [2023-11-30 04:01:23,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2094 transitions. [2023-11-30 04:01:23,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:23,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2094 transitions. [2023-11-30 04:01:23,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 232.66666666666666) internal successors, (2094), 9 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 04:01:23,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 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 04:01:23,217 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 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 04:01:23,219 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 4 predicate places. [2023-11-30 04:01:23,219 INFO L500 AbstractCegarLoop]: Abstraction has has 342 places, 338 transitions, 3267 flow [2023-11-30 04:01:23,219 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 217.5) internal successors, (1740), 8 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 04:01:23,219 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:23,220 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:23,220 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-30 04:01:23,220 INFO L425 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:23,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1136486197, now seen corresponding path program 1 times [2023-11-30 04:01:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:23,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158594265] [2023-11-30 04:01:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:23,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:23,439 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 04:01:23,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:23,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158594265] [2023-11-30 04:01:23,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158594265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:23,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:23,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-30 04:01:23,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368525792] [2023-11-30 04:01:23,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:23,440 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-30 04:01:23,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:23,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-30 04:01:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-30 04:01:23,442 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 361 [2023-11-30 04:01:23,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 338 transitions, 3267 flow. Second operand has 10 states, 10 states have (on average 214.1) internal successors, (2141), 10 states have internal predecessors, (2141), 0 states have call successors, (0), 0 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 04:01:23,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:23,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 361 [2023-11-30 04:01:23,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:25,589 INFO L124 PetriNetUnfolderBase]: 4669/12571 cut-off events. [2023-11-30 04:01:25,589 INFO L125 PetriNetUnfolderBase]: For 138490/139489 co-relation queries the response was YES. [2023-11-30 04:01:25,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76147 conditions, 12571 events. 4669/12571 cut-off events. For 138490/139489 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 119944 event pairs, 1857 based on Foata normal form. 896/12971 useless extension candidates. Maximal degree in co-relation 74471. Up to 6826 conditions per place. [2023-11-30 04:01:25,691 INFO L140 encePairwiseOnDemand]: 329/361 looper letters, 123 selfloop transitions, 18 changer transitions 0/342 dead transitions. [2023-11-30 04:01:25,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 342 transitions, 3561 flow [2023-11-30 04:01:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-30 04:01:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-30 04:01:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2687 transitions. [2023-11-30 04:01:25,697 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6202677746999077 [2023-11-30 04:01:25,697 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2687 transitions. [2023-11-30 04:01:25,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2687 transitions. [2023-11-30 04:01:25,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:25,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2687 transitions. [2023-11-30 04:01:25,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 223.91666666666666) internal successors, (2687), 12 states have internal predecessors, (2687), 0 states have call successors, (0), 0 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 04:01:25,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 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 04:01:25,708 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 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 04:01:25,708 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 1 predicate places. [2023-11-30 04:01:25,708 INFO L500 AbstractCegarLoop]: Abstraction has has 339 places, 342 transitions, 3561 flow [2023-11-30 04:01:25,709 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 214.1) internal successors, (2141), 10 states have internal predecessors, (2141), 0 states have call successors, (0), 0 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 04:01:25,709 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:25,709 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:25,709 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-30 04:01:25,709 INFO L425 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:25,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:25,710 INFO L85 PathProgramCache]: Analyzing trace with hash -871332960, now seen corresponding path program 1 times [2023-11-30 04:01:25,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:25,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144328895] [2023-11-30 04:01:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:25,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:26,273 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 04:01:26,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144328895] [2023-11-30 04:01:26,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144328895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:26,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:26,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-30 04:01:26,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133155708] [2023-11-30 04:01:26,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:26,274 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-30 04:01:26,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:26,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-30 04:01:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-30 04:01:26,276 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 361 [2023-11-30 04:01:26,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 342 transitions, 3561 flow. Second operand has 16 states, 16 states have (on average 180.625) internal successors, (2890), 16 states have internal predecessors, (2890), 0 states have call successors, (0), 0 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 04:01:26,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:26,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 361 [2023-11-30 04:01:26,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:28,704 INFO L124 PetriNetUnfolderBase]: 5050/13216 cut-off events. [2023-11-30 04:01:28,704 INFO L125 PetriNetUnfolderBase]: For 157813/159101 co-relation queries the response was YES. [2023-11-30 04:01:28,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88829 conditions, 13216 events. 5050/13216 cut-off events. For 157813/159101 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 125312 event pairs, 1836 based on Foata normal form. 64/12766 useless extension candidates. Maximal degree in co-relation 86992. Up to 7694 conditions per place. [2023-11-30 04:01:28,957 INFO L140 encePairwiseOnDemand]: 341/361 looper letters, 212 selfloop transitions, 23 changer transitions 0/393 dead transitions. [2023-11-30 04:01:28,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 393 transitions, 4982 flow [2023-11-30 04:01:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-30 04:01:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-30 04:01:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3019 transitions. [2023-11-30 04:01:28,962 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5226800554016621 [2023-11-30 04:01:28,962 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3019 transitions. [2023-11-30 04:01:28,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3019 transitions. [2023-11-30 04:01:28,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:28,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3019 transitions. [2023-11-30 04:01:28,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 188.6875) internal successors, (3019), 16 states have internal predecessors, (3019), 0 states have call successors, (0), 0 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 04:01:28,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 361.0) internal successors, (6137), 17 states have internal predecessors, (6137), 0 states have call successors, (0), 0 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 04:01:28,971 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 361.0) internal successors, (6137), 17 states have internal predecessors, (6137), 0 states have call successors, (0), 0 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 04:01:28,972 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 16 predicate places. [2023-11-30 04:01:28,972 INFO L500 AbstractCegarLoop]: Abstraction has has 354 places, 393 transitions, 4982 flow [2023-11-30 04:01:28,973 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 180.625) internal successors, (2890), 16 states have internal predecessors, (2890), 0 states have call successors, (0), 0 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 04:01:28,973 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:28,973 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:28,973 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-30 04:01:28,973 INFO L425 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:28,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:28,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1007428284, now seen corresponding path program 1 times [2023-11-30 04:01:28,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:28,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703309805] [2023-11-30 04:01:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:28,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:29,029 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 04:01:29,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:29,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703309805] [2023-11-30 04:01:29,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703309805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:29,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:29,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 04:01:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429838722] [2023-11-30 04:01:29,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:29,030 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:01:29,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:01:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:01:29,031 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 361 [2023-11-30 04:01:29,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 393 transitions, 4982 flow. Second operand has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 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 04:01:29,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:29,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 361 [2023-11-30 04:01:29,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:29,987 INFO L124 PetriNetUnfolderBase]: 2765/7128 cut-off events. [2023-11-30 04:01:29,988 INFO L125 PetriNetUnfolderBase]: For 103356/103902 co-relation queries the response was YES. [2023-11-30 04:01:30,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52657 conditions, 7128 events. 2765/7128 cut-off events. For 103356/103902 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 55448 event pairs, 792 based on Foata normal form. 0/6892 useless extension candidates. Maximal degree in co-relation 50449. Up to 4503 conditions per place. [2023-11-30 04:01:30,221 INFO L140 encePairwiseOnDemand]: 357/361 looper letters, 36 selfloop transitions, 3 changer transitions 0/379 dead transitions. [2023-11-30 04:01:30,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 379 transitions, 4848 flow [2023-11-30 04:01:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:01:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:01:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1023 transitions. [2023-11-30 04:01:30,223 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.9445983379501385 [2023-11-30 04:01:30,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1023 transitions. [2023-11-30 04:01:30,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1023 transitions. [2023-11-30 04:01:30,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:30,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1023 transitions. [2023-11-30 04:01:30,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 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 04:01:30,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:30,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:01:30,226 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 18 predicate places. [2023-11-30 04:01:30,226 INFO L500 AbstractCegarLoop]: Abstraction has has 356 places, 379 transitions, 4848 flow [2023-11-30 04:01:30,226 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 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 04:01:30,226 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:30,226 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:30,226 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-30 04:01:30,226 INFO L425 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:30,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1781427125, now seen corresponding path program 1 times [2023-11-30 04:01:30,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:30,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546077815] [2023-11-30 04:01:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:30,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:31,221 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 04:01:31,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:31,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546077815] [2023-11-30 04:01:31,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546077815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:31,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:31,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-30 04:01:31,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753446252] [2023-11-30 04:01:31,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:31,222 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-30 04:01:31,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:31,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-30 04:01:31,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-30 04:01:31,224 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 361 [2023-11-30 04:01:31,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 379 transitions, 4848 flow. Second operand has 17 states, 17 states have (on average 179.52941176470588) internal successors, (3052), 17 states have internal predecessors, (3052), 0 states have call successors, (0), 0 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 04:01:31,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:31,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 361 [2023-11-30 04:01:31,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:32,962 INFO L124 PetriNetUnfolderBase]: 2758/7081 cut-off events. [2023-11-30 04:01:32,962 INFO L125 PetriNetUnfolderBase]: For 115989/116373 co-relation queries the response was YES. [2023-11-30 04:01:32,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56991 conditions, 7081 events. 2758/7081 cut-off events. For 115989/116373 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 54898 event pairs, 412 based on Foata normal form. 8/6861 useless extension candidates. Maximal degree in co-relation 54602. Up to 4486 conditions per place. [2023-11-30 04:01:33,036 INFO L140 encePairwiseOnDemand]: 340/361 looper letters, 207 selfloop transitions, 27 changer transitions 0/394 dead transitions. [2023-11-30 04:01:33,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 394 transitions, 5752 flow [2023-11-30 04:01:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-30 04:01:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-30 04:01:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3147 transitions. [2023-11-30 04:01:33,040 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.512791266090924 [2023-11-30 04:01:33,040 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3147 transitions. [2023-11-30 04:01:33,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3147 transitions. [2023-11-30 04:01:33,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:33,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3147 transitions. [2023-11-30 04:01:33,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 185.11764705882354) internal successors, (3147), 17 states have internal predecessors, (3147), 0 states have call successors, (0), 0 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 04:01:33,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 361.0) internal successors, (6498), 18 states have internal predecessors, (6498), 0 states have call successors, (0), 0 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 04:01:33,049 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 361.0) internal successors, (6498), 18 states have internal predecessors, (6498), 0 states have call successors, (0), 0 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 04:01:33,049 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 33 predicate places. [2023-11-30 04:01:33,049 INFO L500 AbstractCegarLoop]: Abstraction has has 371 places, 394 transitions, 5752 flow [2023-11-30 04:01:33,050 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 179.52941176470588) internal successors, (3052), 17 states have internal predecessors, (3052), 0 states have call successors, (0), 0 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 04:01:33,050 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:33,050 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:33,050 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-30 04:01:33,050 INFO L425 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:33,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:33,050 INFO L85 PathProgramCache]: Analyzing trace with hash 292864336, now seen corresponding path program 1 times [2023-11-30 04:01:33,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:33,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973702126] [2023-11-30 04:01:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:33,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:33,565 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 04:01:33,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973702126] [2023-11-30 04:01:33,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973702126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:33,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:33,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-30 04:01:33,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564493146] [2023-11-30 04:01:33,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:33,566 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-30 04:01:33,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-30 04:01:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-30 04:01:33,649 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 361 [2023-11-30 04:01:33,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 394 transitions, 5752 flow. Second operand has 18 states, 18 states have (on average 187.83333333333334) internal successors, (3381), 18 states have internal predecessors, (3381), 0 states have call successors, (0), 0 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 04:01:33,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:33,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 361 [2023-11-30 04:01:33,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:35,693 INFO L124 PetriNetUnfolderBase]: 3217/7793 cut-off events. [2023-11-30 04:01:35,693 INFO L125 PetriNetUnfolderBase]: For 167218/167673 co-relation queries the response was YES. [2023-11-30 04:01:35,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68602 conditions, 7793 events. 3217/7793 cut-off events. For 167218/167673 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 60159 event pairs, 414 based on Foata normal form. 2/7562 useless extension candidates. Maximal degree in co-relation 66050. Up to 5026 conditions per place. [2023-11-30 04:01:35,770 INFO L140 encePairwiseOnDemand]: 330/361 looper letters, 238 selfloop transitions, 38 changer transitions 0/459 dead transitions. [2023-11-30 04:01:35,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 459 transitions, 7895 flow [2023-11-30 04:01:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-30 04:01:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-30 04:01:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3701 transitions. [2023-11-30 04:01:35,774 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.539583029596151 [2023-11-30 04:01:35,775 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3701 transitions. [2023-11-30 04:01:35,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3701 transitions. [2023-11-30 04:01:35,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:35,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3701 transitions. [2023-11-30 04:01:35,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 194.78947368421052) internal successors, (3701), 19 states have internal predecessors, (3701), 0 states have call successors, (0), 0 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 04:01:35,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 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 04:01:35,802 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 361.0) internal successors, (7220), 20 states have internal predecessors, (7220), 0 states have call successors, (0), 0 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 04:01:35,808 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 51 predicate places. [2023-11-30 04:01:35,808 INFO L500 AbstractCegarLoop]: Abstraction has has 389 places, 459 transitions, 7895 flow [2023-11-30 04:01:35,809 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.83333333333334) internal successors, (3381), 18 states have internal predecessors, (3381), 0 states have call successors, (0), 0 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 04:01:35,809 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:35,809 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:35,809 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-30 04:01:35,809 INFO L425 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:35,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:35,809 INFO L85 PathProgramCache]: Analyzing trace with hash -610835849, now seen corresponding path program 1 times [2023-11-30 04:01:35,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:35,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525245823] [2023-11-30 04:01:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:36,053 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 04:01:36,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:36,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525245823] [2023-11-30 04:01:36,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525245823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:36,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:36,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:01:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884328808] [2023-11-30 04:01:36,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:36,057 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:01:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:01:36,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:01:36,059 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 361 [2023-11-30 04:01:36,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 459 transitions, 7895 flow. Second operand has 7 states, 7 states have (on average 213.85714285714286) internal successors, (1497), 7 states have internal predecessors, (1497), 0 states have call successors, (0), 0 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 04:01:36,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:36,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 361 [2023-11-30 04:01:36,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:37,536 INFO L124 PetriNetUnfolderBase]: 3207/7774 cut-off events. [2023-11-30 04:01:37,536 INFO L125 PetriNetUnfolderBase]: For 193753/194218 co-relation queries the response was YES. [2023-11-30 04:01:37,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72758 conditions, 7774 events. 3207/7774 cut-off events. For 193753/194218 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 59978 event pairs, 414 based on Foata normal form. 9/7550 useless extension candidates. Maximal degree in co-relation 70045. Up to 5007 conditions per place. [2023-11-30 04:01:37,617 INFO L140 encePairwiseOnDemand]: 356/361 looper letters, 248 selfloop transitions, 4 changer transitions 0/458 dead transitions. [2023-11-30 04:01:37,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 458 transitions, 8383 flow [2023-11-30 04:01:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:01:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:01:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1345 transitions. [2023-11-30 04:01:37,619 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6209602954755309 [2023-11-30 04:01:37,619 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1345 transitions. [2023-11-30 04:01:37,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1345 transitions. [2023-11-30 04:01:37,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:37,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1345 transitions. [2023-11-30 04:01:37,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 224.16666666666666) internal successors, (1345), 6 states have internal predecessors, (1345), 0 states have call successors, (0), 0 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 04:01:37,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 04:01:37,622 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 04:01:37,622 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 55 predicate places. [2023-11-30 04:01:37,622 INFO L500 AbstractCegarLoop]: Abstraction has has 393 places, 458 transitions, 8383 flow [2023-11-30 04:01:37,623 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 213.85714285714286) internal successors, (1497), 7 states have internal predecessors, (1497), 0 states have call successors, (0), 0 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 04:01:37,623 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:37,623 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:37,623 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-30 04:01:37,623 INFO L425 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:37,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:37,623 INFO L85 PathProgramCache]: Analyzing trace with hash -610835850, now seen corresponding path program 1 times [2023-11-30 04:01:37,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:37,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965202115] [2023-11-30 04:01:37,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:37,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:37,732 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 04:01:37,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:37,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965202115] [2023-11-30 04:01:37,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965202115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:37,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:37,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:01:37,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523502162] [2023-11-30 04:01:37,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:37,733 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:01:37,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:01:37,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:01:37,734 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 361 [2023-11-30 04:01:37,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 458 transitions, 8383 flow. Second operand has 7 states, 7 states have (on average 246.85714285714286) internal successors, (1728), 7 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 04:01:37,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:37,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 361 [2023-11-30 04:01:37,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:39,071 INFO L124 PetriNetUnfolderBase]: 3006/7344 cut-off events. [2023-11-30 04:01:39,071 INFO L125 PetriNetUnfolderBase]: For 215981/216548 co-relation queries the response was YES. [2023-11-30 04:01:39,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71971 conditions, 7344 events. 3006/7344 cut-off events. For 215981/216548 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 55922 event pairs, 352 based on Foata normal form. 137/7253 useless extension candidates. Maximal degree in co-relation 69175. Up to 4682 conditions per place. [2023-11-30 04:01:39,155 INFO L140 encePairwiseOnDemand]: 356/361 looper letters, 216 selfloop transitions, 2 changer transitions 0/451 dead transitions. [2023-11-30 04:01:39,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 451 transitions, 8651 flow [2023-11-30 04:01:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 04:01:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 04:01:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1045 transitions. [2023-11-30 04:01:39,156 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7236842105263158 [2023-11-30 04:01:39,156 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1045 transitions. [2023-11-30 04:01:39,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1045 transitions. [2023-11-30 04:01:39,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:39,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1045 transitions. [2023-11-30 04:01:39,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 261.25) internal successors, (1045), 4 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 04:01:39,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 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 04:01:39,158 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 361.0) internal successors, (1805), 5 states have internal predecessors, (1805), 0 states have call successors, (0), 0 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 04:01:39,159 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 55 predicate places. [2023-11-30 04:01:39,159 INFO L500 AbstractCegarLoop]: Abstraction has has 393 places, 451 transitions, 8651 flow [2023-11-30 04:01:39,159 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.85714285714286) internal successors, (1728), 7 states have internal predecessors, (1728), 0 states have call successors, (0), 0 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 04:01:39,159 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:39,159 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:39,159 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-30 04:01:39,159 INFO L425 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:39,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:39,160 INFO L85 PathProgramCache]: Analyzing trace with hash -3942073, now seen corresponding path program 1 times [2023-11-30 04:01:39,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:39,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404773356] [2023-11-30 04:01:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:39,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:39,361 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 04:01:39,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:39,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404773356] [2023-11-30 04:01:39,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404773356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:39,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:39,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-30 04:01:39,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086842796] [2023-11-30 04:01:39,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:39,362 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-30 04:01:39,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:39,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-30 04:01:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-30 04:01:39,363 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 361 [2023-11-30 04:01:39,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 451 transitions, 8651 flow. Second operand has 10 states, 10 states have (on average 233.0) internal successors, (2330), 10 states have internal predecessors, (2330), 0 states have call successors, (0), 0 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 04:01:39,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:39,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 361 [2023-11-30 04:01:39,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:41,061 INFO L124 PetriNetUnfolderBase]: 3026/7346 cut-off events. [2023-11-30 04:01:41,061 INFO L125 PetriNetUnfolderBase]: For 244131/244736 co-relation queries the response was YES. [2023-11-30 04:01:41,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76024 conditions, 7346 events. 3026/7346 cut-off events. For 244131/244736 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 56039 event pairs, 352 based on Foata normal form. 18/7136 useless extension candidates. Maximal degree in co-relation 73077. Up to 4684 conditions per place. [2023-11-30 04:01:41,160 INFO L140 encePairwiseOnDemand]: 345/361 looper letters, 220 selfloop transitions, 14 changer transitions 0/459 dead transitions. [2023-11-30 04:01:41,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 459 transitions, 9441 flow [2023-11-30 04:01:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-30 04:01:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-30 04:01:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2847 transitions. [2023-11-30 04:01:41,162 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.657202216066482 [2023-11-30 04:01:41,162 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2847 transitions. [2023-11-30 04:01:41,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2847 transitions. [2023-11-30 04:01:41,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:41,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2847 transitions. [2023-11-30 04:01:41,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 237.25) internal successors, (2847), 12 states have internal predecessors, (2847), 0 states have call successors, (0), 0 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 04:01:41,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 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 04:01:41,182 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 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 04:01:41,182 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 64 predicate places. [2023-11-30 04:01:41,182 INFO L500 AbstractCegarLoop]: Abstraction has has 402 places, 459 transitions, 9441 flow [2023-11-30 04:01:41,183 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.0) internal successors, (2330), 10 states have internal predecessors, (2330), 0 states have call successors, (0), 0 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 04:01:41,183 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:41,183 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:41,183 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-30 04:01:41,183 INFO L425 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:41,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -3942074, now seen corresponding path program 1 times [2023-11-30 04:01:41,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:41,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214190455] [2023-11-30 04:01:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:41,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:41,297 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 04:01:41,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:41,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214190455] [2023-11-30 04:01:41,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214190455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:41,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:41,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 04:01:41,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310366299] [2023-11-30 04:01:41,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:41,298 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 04:01:41,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 04:01:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-30 04:01:41,300 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 361 [2023-11-30 04:01:41,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 459 transitions, 9441 flow. Second operand has 8 states, 8 states have (on average 236.625) internal successors, (1893), 8 states have internal predecessors, (1893), 0 states have call successors, (0), 0 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 04:01:41,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:41,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 361 [2023-11-30 04:01:41,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:42,895 INFO L124 PetriNetUnfolderBase]: 3007/7323 cut-off events. [2023-11-30 04:01:42,895 INFO L125 PetriNetUnfolderBase]: For 274600/275135 co-relation queries the response was YES. [2023-11-30 04:01:42,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79098 conditions, 7323 events. 3007/7323 cut-off events. For 274600/275135 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 55533 event pairs, 346 based on Foata normal form. 18/7114 useless extension candidates. Maximal degree in co-relation 76005. Up to 4646 conditions per place. [2023-11-30 04:01:42,985 INFO L140 encePairwiseOnDemand]: 350/361 looper letters, 231 selfloop transitions, 9 changer transitions 0/457 dead transitions. [2023-11-30 04:01:42,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 457 transitions, 9865 flow [2023-11-30 04:01:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-30 04:01:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-30 04:01:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2179 transitions. [2023-11-30 04:01:42,987 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6706678978147123 [2023-11-30 04:01:42,987 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2179 transitions. [2023-11-30 04:01:42,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2179 transitions. [2023-11-30 04:01:42,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:42,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2179 transitions. [2023-11-30 04:01:42,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 242.11111111111111) internal successors, (2179), 9 states have internal predecessors, (2179), 0 states have call successors, (0), 0 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 04:01:42,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 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 04:01:42,990 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 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 04:01:42,991 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 70 predicate places. [2023-11-30 04:01:42,991 INFO L500 AbstractCegarLoop]: Abstraction has has 408 places, 457 transitions, 9865 flow [2023-11-30 04:01:42,992 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 236.625) internal successors, (1893), 8 states have internal predecessors, (1893), 0 states have call successors, (0), 0 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 04:01:42,992 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:42,992 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:42,992 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-30 04:01:42,992 INFO L425 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:42,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1105186070, now seen corresponding path program 1 times [2023-11-30 04:01:42,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:42,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515171299] [2023-11-30 04:01:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:42,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:44,344 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 04:01:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515171299] [2023-11-30 04:01:44,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515171299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:44,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:44,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-11-30 04:01:44,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924167538] [2023-11-30 04:01:44,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:44,345 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-30 04:01:44,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-30 04:01:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2023-11-30 04:01:44,348 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 361 [2023-11-30 04:01:44,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 457 transitions, 9865 flow. Second operand has 25 states, 25 states have (on average 169.76) internal successors, (4244), 25 states have internal predecessors, (4244), 0 states have call successors, (0), 0 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 04:01:44,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:44,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 361 [2023-11-30 04:01:44,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:48,017 INFO L124 PetriNetUnfolderBase]: 3598/8484 cut-off events. [2023-11-30 04:01:48,017 INFO L125 PetriNetUnfolderBase]: For 377044/378033 co-relation queries the response was YES. [2023-11-30 04:01:48,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97680 conditions, 8484 events. 3598/8484 cut-off events. For 377044/378033 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 64554 event pairs, 369 based on Foata normal form. 21/8224 useless extension candidates. Maximal degree in co-relation 94130. Up to 5336 conditions per place. [2023-11-30 04:01:48,120 INFO L140 encePairwiseOnDemand]: 325/361 looper letters, 347 selfloop transitions, 58 changer transitions 2/559 dead transitions. [2023-11-30 04:01:48,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 559 transitions, 14075 flow [2023-11-30 04:01:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-30 04:01:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-30 04:01:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5912 transitions. [2023-11-30 04:01:48,133 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.48166856770408994 [2023-11-30 04:01:48,133 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5912 transitions. [2023-11-30 04:01:48,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5912 transitions. [2023-11-30 04:01:48,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:48,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5912 transitions. [2023-11-30 04:01:48,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 173.88235294117646) internal successors, (5912), 34 states have internal predecessors, (5912), 0 states have call successors, (0), 0 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 04:01:48,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 361.0) internal successors, (12635), 35 states have internal predecessors, (12635), 0 states have call successors, (0), 0 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 04:01:48,144 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 361.0) internal successors, (12635), 35 states have internal predecessors, (12635), 0 states have call successors, (0), 0 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 04:01:48,145 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 103 predicate places. [2023-11-30 04:01:48,145 INFO L500 AbstractCegarLoop]: Abstraction has has 441 places, 559 transitions, 14075 flow [2023-11-30 04:01:48,145 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 169.76) internal successors, (4244), 25 states have internal predecessors, (4244), 0 states have call successors, (0), 0 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 04:01:48,145 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:48,146 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:48,168 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-30 04:01:48,168 INFO L425 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:48,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1590831398, now seen corresponding path program 1 times [2023-11-30 04:01:48,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:48,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704831274] [2023-11-30 04:01:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:48,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:48,973 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 04:01:48,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:48,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704831274] [2023-11-30 04:01:48,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704831274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:48,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:48,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-30 04:01:48,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762338197] [2023-11-30 04:01:48,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:48,974 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-30 04:01:48,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:48,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-30 04:01:48,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-30 04:01:48,976 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 361 [2023-11-30 04:01:48,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 559 transitions, 14075 flow. Second operand has 19 states, 19 states have (on average 172.31578947368422) internal successors, (3274), 19 states have internal predecessors, (3274), 0 states have call successors, (0), 0 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 04:01:48,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:48,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 361 [2023-11-30 04:01:48,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:52,262 INFO L124 PetriNetUnfolderBase]: 3771/8817 cut-off events. [2023-11-30 04:01:52,263 INFO L125 PetriNetUnfolderBase]: For 423999/425573 co-relation queries the response was YES. [2023-11-30 04:01:52,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107793 conditions, 8817 events. 3771/8817 cut-off events. For 423999/425573 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 67244 event pairs, 365 based on Foata normal form. 2/8533 useless extension candidates. Maximal degree in co-relation 104053. Up to 5575 conditions per place. [2023-11-30 04:01:52,380 INFO L140 encePairwiseOnDemand]: 328/361 looper letters, 412 selfloop transitions, 51 changer transitions 2/629 dead transitions. [2023-11-30 04:01:52,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 629 transitions, 17421 flow [2023-11-30 04:01:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-30 04:01:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-30 04:01:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4119 transitions. [2023-11-30 04:01:52,390 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4960857521377815 [2023-11-30 04:01:52,390 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4119 transitions. [2023-11-30 04:01:52,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4119 transitions. [2023-11-30 04:01:52,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:52,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4119 transitions. [2023-11-30 04:01:52,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 179.08695652173913) internal successors, (4119), 23 states have internal predecessors, (4119), 0 states have call successors, (0), 0 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 04:01:52,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 361.0) internal successors, (8664), 24 states have internal predecessors, (8664), 0 states have call successors, (0), 0 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 04:01:52,451 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 361.0) internal successors, (8664), 24 states have internal predecessors, (8664), 0 states have call successors, (0), 0 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 04:01:52,452 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 125 predicate places. [2023-11-30 04:01:52,484 INFO L500 AbstractCegarLoop]: Abstraction has has 463 places, 629 transitions, 17421 flow [2023-11-30 04:01:52,484 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 172.31578947368422) internal successors, (3274), 19 states have internal predecessors, (3274), 0 states have call successors, (0), 0 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 04:01:52,484 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:52,485 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:52,485 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-30 04:01:52,485 INFO L425 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:52,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -262181294, now seen corresponding path program 2 times [2023-11-30 04:01:52,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:52,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125881519] [2023-11-30 04:01:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:52,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:53,382 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 04:01:53,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:53,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125881519] [2023-11-30 04:01:53,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125881519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:53,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:53,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-30 04:01:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653463591] [2023-11-30 04:01:53,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:53,383 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-30 04:01:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-30 04:01:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-30 04:01:53,385 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 361 [2023-11-30 04:01:53,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 629 transitions, 17421 flow. Second operand has 19 states, 19 states have (on average 172.31578947368422) internal successors, (3274), 19 states have internal predecessors, (3274), 0 states have call successors, (0), 0 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 04:01:53,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:53,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 361 [2023-11-30 04:01:53,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:01:56,611 INFO L124 PetriNetUnfolderBase]: 4017/9235 cut-off events. [2023-11-30 04:01:56,611 INFO L125 PetriNetUnfolderBase]: For 483149/485376 co-relation queries the response was YES. [2023-11-30 04:01:56,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120698 conditions, 9235 events. 4017/9235 cut-off events. For 483149/485376 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 69955 event pairs, 383 based on Foata normal form. 17/8954 useless extension candidates. Maximal degree in co-relation 116676. Up to 5877 conditions per place. [2023-11-30 04:01:56,741 INFO L140 encePairwiseOnDemand]: 329/361 looper letters, 440 selfloop transitions, 56 changer transitions 3/663 dead transitions. [2023-11-30 04:01:56,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 663 transitions, 19799 flow [2023-11-30 04:01:56,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-30 04:01:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-30 04:01:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3779 transitions. [2023-11-30 04:01:56,745 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4984830497295871 [2023-11-30 04:01:56,745 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3779 transitions. [2023-11-30 04:01:56,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3779 transitions. [2023-11-30 04:01:56,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:01:56,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3779 transitions. [2023-11-30 04:01:56,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 179.95238095238096) internal successors, (3779), 21 states have internal predecessors, (3779), 0 states have call successors, (0), 0 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 04:01:56,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 0 states have call successors, (0), 0 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 04:01:56,752 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 0 states have call successors, (0), 0 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 04:01:56,752 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 145 predicate places. [2023-11-30 04:01:56,752 INFO L500 AbstractCegarLoop]: Abstraction has has 483 places, 663 transitions, 19799 flow [2023-11-30 04:01:56,753 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 172.31578947368422) internal successors, (3274), 19 states have internal predecessors, (3274), 0 states have call successors, (0), 0 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 04:01:56,753 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:01:56,753 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:01:56,753 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-30 04:01:56,753 INFO L425 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:01:56,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:01:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash 386654216, now seen corresponding path program 3 times [2023-11-30 04:01:56,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:01:56,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686332256] [2023-11-30 04:01:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:01:56,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:01:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:01:58,258 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 04:01:58,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:01:58,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686332256] [2023-11-30 04:01:58,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686332256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:01:58,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:01:58,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-11-30 04:01:58,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705018055] [2023-11-30 04:01:58,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:01:58,261 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-30 04:01:58,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:01:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-30 04:01:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2023-11-30 04:01:58,265 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 361 [2023-11-30 04:01:58,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 663 transitions, 19799 flow. Second operand has 30 states, 30 states have (on average 166.26666666666668) internal successors, (4988), 30 states have internal predecessors, (4988), 0 states have call successors, (0), 0 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 04:01:58,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:01:58,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 361 [2023-11-30 04:01:58,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:02:05,481 INFO L124 PetriNetUnfolderBase]: 7208/17241 cut-off events. [2023-11-30 04:02:05,481 INFO L125 PetriNetUnfolderBase]: For 915601/923912 co-relation queries the response was YES. [2023-11-30 04:02:05,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223981 conditions, 17241 events. 7208/17241 cut-off events. For 915601/923912 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 148109 event pairs, 845 based on Foata normal form. 249/16729 useless extension candidates. Maximal degree in co-relation 216667. Up to 10505 conditions per place. [2023-11-30 04:02:05,898 INFO L140 encePairwiseOnDemand]: 320/361 looper letters, 860 selfloop transitions, 78 changer transitions 3/1096 dead transitions. [2023-11-30 04:02:05,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1096 transitions, 37430 flow [2023-11-30 04:02:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-30 04:02:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-30 04:02:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5707 transitions. [2023-11-30 04:02:05,902 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4940270083102493 [2023-11-30 04:02:05,903 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5707 transitions. [2023-11-30 04:02:05,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5707 transitions. [2023-11-30 04:02:05,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:02:05,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5707 transitions. [2023-11-30 04:02:05,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 178.34375) internal successors, (5707), 32 states have internal predecessors, (5707), 0 states have call successors, (0), 0 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 04:02:05,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 361.0) internal successors, (11913), 33 states have internal predecessors, (11913), 0 states have call successors, (0), 0 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 04:02:05,916 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 361.0) internal successors, (11913), 33 states have internal predecessors, (11913), 0 states have call successors, (0), 0 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 04:02:05,916 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 176 predicate places. [2023-11-30 04:02:05,916 INFO L500 AbstractCegarLoop]: Abstraction has has 514 places, 1096 transitions, 37430 flow [2023-11-30 04:02:05,917 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 166.26666666666668) internal successors, (4988), 30 states have internal predecessors, (4988), 0 states have call successors, (0), 0 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 04:02:05,917 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:02:05,917 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:05,917 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-30 04:02:05,917 INFO L425 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:02:05,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:02:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 789766337, now seen corresponding path program 1 times [2023-11-30 04:02:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:02:05,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940306188] [2023-11-30 04:02:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:02:05,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:02:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:02:09,782 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 04:02:09,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:02:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940306188] [2023-11-30 04:02:09,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940306188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:02:09,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:02:09,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-11-30 04:02:09,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928969446] [2023-11-30 04:02:09,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:02:09,783 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-30 04:02:09,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:02:09,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-30 04:02:09,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2023-11-30 04:02:09,786 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 361 [2023-11-30 04:02:09,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1096 transitions, 37430 flow. Second operand has 29 states, 29 states have (on average 168.41379310344828) internal successors, (4884), 29 states have internal predecessors, (4884), 0 states have call successors, (0), 0 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 04:02:09,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:02:09,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 361 [2023-11-30 04:02:09,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:02:19,288 INFO L124 PetriNetUnfolderBase]: 7512/18501 cut-off events. [2023-11-30 04:02:19,288 INFO L125 PetriNetUnfolderBase]: For 1043287/1051948 co-relation queries the response was YES. [2023-11-30 04:02:19,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247405 conditions, 18501 events. 7512/18501 cut-off events. For 1043287/1051948 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 163078 event pairs, 903 based on Foata normal form. 66/17707 useless extension candidates. Maximal degree in co-relation 239294. Up to 11084 conditions per place. [2023-11-30 04:02:19,844 INFO L140 encePairwiseOnDemand]: 321/361 looper letters, 1000 selfloop transitions, 105 changer transitions 2/1271 dead transitions. [2023-11-30 04:02:19,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1271 transitions, 47265 flow [2023-11-30 04:02:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-30 04:02:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-30 04:02:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6403 transitions. [2023-11-30 04:02:19,848 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4793741109530583 [2023-11-30 04:02:19,848 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6403 transitions. [2023-11-30 04:02:19,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6403 transitions. [2023-11-30 04:02:19,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:02:19,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6403 transitions. [2023-11-30 04:02:19,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 173.05405405405406) internal successors, (6403), 37 states have internal predecessors, (6403), 0 states have call successors, (0), 0 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 04:02:19,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 361.0) internal successors, (13718), 38 states have internal predecessors, (13718), 0 states have call successors, (0), 0 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 04:02:19,861 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 361.0) internal successors, (13718), 38 states have internal predecessors, (13718), 0 states have call successors, (0), 0 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 04:02:19,861 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 212 predicate places. [2023-11-30 04:02:19,861 INFO L500 AbstractCegarLoop]: Abstraction has has 550 places, 1271 transitions, 47265 flow [2023-11-30 04:02:19,862 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 168.41379310344828) internal successors, (4884), 29 states have internal predecessors, (4884), 0 states have call successors, (0), 0 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 04:02:19,862 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:02:19,862 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:19,862 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-30 04:02:19,862 INFO L425 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:02:19,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:02:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1357908137, now seen corresponding path program 2 times [2023-11-30 04:02:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:02:19,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906117828] [2023-11-30 04:02:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:02:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:02:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:02:22,816 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 04:02:22,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:02:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906117828] [2023-11-30 04:02:22,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906117828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:02:22,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:02:22,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-11-30 04:02:22,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138873982] [2023-11-30 04:02:22,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:02:22,817 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-30 04:02:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:02:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-30 04:02:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-11-30 04:02:22,820 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 361 [2023-11-30 04:02:22,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1271 transitions, 47265 flow. Second operand has 28 states, 28 states have (on average 168.5) internal successors, (4718), 28 states have internal predecessors, (4718), 0 states have call successors, (0), 0 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 04:02:22,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:02:22,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 361 [2023-11-30 04:02:22,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:02:32,413 INFO L124 PetriNetUnfolderBase]: 7900/19194 cut-off events. [2023-11-30 04:02:32,413 INFO L125 PetriNetUnfolderBase]: For 1163390/1170781 co-relation queries the response was YES. [2023-11-30 04:02:32,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271408 conditions, 19194 events. 7900/19194 cut-off events. For 1163390/1170781 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 169126 event pairs, 566 based on Foata normal form. 148/18526 useless extension candidates. Maximal degree in co-relation 262386. Up to 11593 conditions per place. [2023-11-30 04:02:32,699 INFO L140 encePairwiseOnDemand]: 323/361 looper letters, 1084 selfloop transitions, 125 changer transitions 6/1379 dead transitions. [2023-11-30 04:02:32,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1379 transitions, 54668 flow [2023-11-30 04:02:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-30 04:02:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-30 04:02:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5892 transitions. [2023-11-30 04:02:32,703 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.48003910705556463 [2023-11-30 04:02:32,703 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5892 transitions. [2023-11-30 04:02:32,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5892 transitions. [2023-11-30 04:02:32,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:02:32,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5892 transitions. [2023-11-30 04:02:32,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 173.2941176470588) internal successors, (5892), 34 states have internal predecessors, (5892), 0 states have call successors, (0), 0 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 04:02:32,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 361.0) internal successors, (12635), 35 states have internal predecessors, (12635), 0 states have call successors, (0), 0 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 04:02:32,713 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 361.0) internal successors, (12635), 35 states have internal predecessors, (12635), 0 states have call successors, (0), 0 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 04:02:32,713 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 245 predicate places. [2023-11-30 04:02:32,713 INFO L500 AbstractCegarLoop]: Abstraction has has 583 places, 1379 transitions, 54668 flow [2023-11-30 04:02:32,714 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 168.5) internal successors, (4718), 28 states have internal predecessors, (4718), 0 states have call successors, (0), 0 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 04:02:32,714 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:02:32,714 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:32,714 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-30 04:02:32,714 INFO L425 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:02:32,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:02:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash 233672759, now seen corresponding path program 3 times [2023-11-30 04:02:32,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:02:32,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181302751] [2023-11-30 04:02:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:02:32,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:02:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:02:34,179 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 04:02:34,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:02:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181302751] [2023-11-30 04:02:34,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181302751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:02:34,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:02:34,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-11-30 04:02:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026968265] [2023-11-30 04:02:34,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:02:34,181 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-30 04:02:34,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:02:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-30 04:02:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2023-11-30 04:02:34,183 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 361 [2023-11-30 04:02:34,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 1379 transitions, 54668 flow. Second operand has 28 states, 28 states have (on average 168.5) internal successors, (4718), 28 states have internal predecessors, (4718), 0 states have call successors, (0), 0 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 04:02:34,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:02:34,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 361 [2023-11-30 04:02:34,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:02:43,322 INFO L124 PetriNetUnfolderBase]: 7767/19104 cut-off events. [2023-11-30 04:02:43,323 INFO L125 PetriNetUnfolderBase]: For 1234321/1242993 co-relation queries the response was YES. [2023-11-30 04:02:43,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279854 conditions, 19104 events. 7767/19104 cut-off events. For 1234321/1242993 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 170221 event pairs, 580 based on Foata normal form. 207/18477 useless extension candidates. Maximal degree in co-relation 270426. Up to 11450 conditions per place. [2023-11-30 04:02:43,617 INFO L140 encePairwiseOnDemand]: 324/361 looper letters, 1121 selfloop transitions, 125 changer transitions 6/1416 dead transitions. [2023-11-30 04:02:43,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1416 transitions, 58995 flow [2023-11-30 04:02:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-30 04:02:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-30 04:02:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5020 transitions. [2023-11-30 04:02:43,620 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4795109370522495 [2023-11-30 04:02:43,620 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5020 transitions. [2023-11-30 04:02:43,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5020 transitions. [2023-11-30 04:02:43,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:02:43,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5020 transitions. [2023-11-30 04:02:43,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 173.10344827586206) internal successors, (5020), 29 states have internal predecessors, (5020), 0 states have call successors, (0), 0 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 04:02:43,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 361.0) internal successors, (10830), 30 states have internal predecessors, (10830), 0 states have call successors, (0), 0 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 04:02:43,628 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 361.0) internal successors, (10830), 30 states have internal predecessors, (10830), 0 states have call successors, (0), 0 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 04:02:43,629 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 273 predicate places. [2023-11-30 04:02:43,629 INFO L500 AbstractCegarLoop]: Abstraction has has 611 places, 1416 transitions, 58995 flow [2023-11-30 04:02:43,629 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 168.5) internal successors, (4718), 28 states have internal predecessors, (4718), 0 states have call successors, (0), 0 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 04:02:43,629 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:02:43,629 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:43,629 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-30 04:02:43,630 INFO L425 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:02:43,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:02:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1565800729, now seen corresponding path program 1 times [2023-11-30 04:02:43,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:02:43,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597457813] [2023-11-30 04:02:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:02:43,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:02:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:02:46,479 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 04:02:46,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:02:46,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597457813] [2023-11-30 04:02:46,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597457813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:02:46,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:02:46,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-11-30 04:02:46,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767148416] [2023-11-30 04:02:46,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:02:46,480 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-30 04:02:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:02:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-30 04:02:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2023-11-30 04:02:46,483 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 361 [2023-11-30 04:02:46,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 1416 transitions, 58995 flow. Second operand has 29 states, 29 states have (on average 169.86206896551724) internal successors, (4926), 29 states have internal predecessors, (4926), 0 states have call successors, (0), 0 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 04:02:46,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:02:46,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 361 [2023-11-30 04:02:46,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:02:57,385 INFO L124 PetriNetUnfolderBase]: 8100/19862 cut-off events. [2023-11-30 04:02:57,385 INFO L125 PetriNetUnfolderBase]: For 1390349/1404525 co-relation queries the response was YES. [2023-11-30 04:02:57,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302811 conditions, 19862 events. 8100/19862 cut-off events. For 1390349/1404525 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 176009 event pairs, 678 based on Foata normal form. 89/19037 useless extension candidates. Maximal degree in co-relation 292996. Up to 11830 conditions per place. [2023-11-30 04:02:57,712 INFO L140 encePairwiseOnDemand]: 319/361 looper letters, 1115 selfloop transitions, 73 changer transitions 6/1461 dead transitions. [2023-11-30 04:02:57,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 1461 transitions, 63404 flow [2023-11-30 04:02:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-30 04:02:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-30 04:02:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 6615 transitions. [2023-11-30 04:02:57,721 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4822131506050445 [2023-11-30 04:02:57,721 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 6615 transitions. [2023-11-30 04:02:57,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 6615 transitions. [2023-11-30 04:02:57,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:02:57,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 6615 transitions. [2023-11-30 04:02:57,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 174.07894736842104) internal successors, (6615), 38 states have internal predecessors, (6615), 0 states have call successors, (0), 0 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 04:02:57,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 361.0) internal successors, (14079), 39 states have internal predecessors, (14079), 0 states have call successors, (0), 0 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 04:02:57,764 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 361.0) internal successors, (14079), 39 states have internal predecessors, (14079), 0 states have call successors, (0), 0 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 04:02:57,764 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 310 predicate places. [2023-11-30 04:02:57,765 INFO L500 AbstractCegarLoop]: Abstraction has has 648 places, 1461 transitions, 63404 flow [2023-11-30 04:02:57,766 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 169.86206896551724) internal successors, (4926), 29 states have internal predecessors, (4926), 0 states have call successors, (0), 0 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 04:02:57,766 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:02:57,766 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:57,766 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-30 04:02:57,766 INFO L425 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:02:57,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:02:57,766 INFO L85 PathProgramCache]: Analyzing trace with hash 979908543, now seen corresponding path program 1 times [2023-11-30 04:02:57,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:02:57,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115173432] [2023-11-30 04:02:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:02:57,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:02:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:02:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:02:58,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:02:58,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115173432] [2023-11-30 04:02:58,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115173432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:02:58,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:02:58,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 04:02:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133158051] [2023-11-30 04:02:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:02:58,454 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 04:02:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:02:58,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 04:02:58,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-30 04:02:58,456 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 361 [2023-11-30 04:02:58,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 1461 transitions, 63404 flow. Second operand has 8 states, 8 states have (on average 209.125) internal successors, (1673), 8 states have internal predecessors, (1673), 0 states have call successors, (0), 0 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 04:02:58,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:02:58,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 361 [2023-11-30 04:02:58,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:03:09,458 INFO L124 PetriNetUnfolderBase]: 10753/25552 cut-off events. [2023-11-30 04:03:09,458 INFO L125 PetriNetUnfolderBase]: For 2268334/2285801 co-relation queries the response was YES. [2023-11-30 04:03:09,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399901 conditions, 25552 events. 10753/25552 cut-off events. For 2268334/2285801 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 232961 event pairs, 720 based on Foata normal form. 66/24319 useless extension candidates. Maximal degree in co-relation 389617. Up to 14832 conditions per place. [2023-11-30 04:03:09,930 INFO L140 encePairwiseOnDemand]: 354/361 looper letters, 1437 selfloop transitions, 5 changer transitions 6/1762 dead transitions. [2023-11-30 04:03:09,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1762 transitions, 82511 flow [2023-11-30 04:03:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:03:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:03:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1354 transitions. [2023-11-30 04:03:09,931 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6251154201292706 [2023-11-30 04:03:09,931 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1354 transitions. [2023-11-30 04:03:09,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1354 transitions. [2023-11-30 04:03:09,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:03:09,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1354 transitions. [2023-11-30 04:03:09,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.66666666666666) internal successors, (1354), 6 states have internal predecessors, (1354), 0 states have call successors, (0), 0 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 04:03:09,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 04:03:09,934 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 361.0) internal successors, (2527), 7 states have internal predecessors, (2527), 0 states have call successors, (0), 0 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 04:03:09,934 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 315 predicate places. [2023-11-30 04:03:09,934 INFO L500 AbstractCegarLoop]: Abstraction has has 653 places, 1762 transitions, 82511 flow [2023-11-30 04:03:09,934 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 209.125) internal successors, (1673), 8 states have internal predecessors, (1673), 0 states have call successors, (0), 0 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 04:03:09,934 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:03:09,934 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:09,934 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-30 04:03:09,934 INFO L425 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:03:09,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:03:09,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2142219536, now seen corresponding path program 1 times [2023-11-30 04:03:09,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:03:09,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742458813] [2023-11-30 04:03:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:03:09,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:03:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:03:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:03:09,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:03:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742458813] [2023-11-30 04:03:09,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742458813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:03:09,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:03:09,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 04:03:09,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100081072] [2023-11-30 04:03:09,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:03:09,967 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:03:09,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:03:09,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:03:09,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:03:09,968 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 361 [2023-11-30 04:03:09,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 1762 transitions, 82511 flow. Second operand has 3 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 0 states have call successors, (0), 0 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 04:03:09,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:03:09,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 361 [2023-11-30 04:03:09,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:03:14,899 INFO L124 PetriNetUnfolderBase]: 4621/11599 cut-off events. [2023-11-30 04:03:14,899 INFO L125 PetriNetUnfolderBase]: For 1271551/1276623 co-relation queries the response was YES. [2023-11-30 04:03:14,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179371 conditions, 11599 events. 4621/11599 cut-off events. For 1271551/1276623 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 96596 event pairs, 328 based on Foata normal form. 6/10930 useless extension candidates. Maximal degree in co-relation 170733. Up to 6120 conditions per place. [2023-11-30 04:03:15,074 INFO L140 encePairwiseOnDemand]: 355/361 looper letters, 482 selfloop transitions, 5 changer transitions 18/1153 dead transitions. [2023-11-30 04:03:15,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1153 transitions, 53390 flow [2023-11-30 04:03:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:03:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:03:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1022 transitions. [2023-11-30 04:03:15,075 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.9436749769159741 [2023-11-30 04:03:15,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1022 transitions. [2023-11-30 04:03:15,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1022 transitions. [2023-11-30 04:03:15,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:03:15,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1022 transitions. [2023-11-30 04:03:15,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 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 04:03:15,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:03:15,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:03:15,077 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 315 predicate places. [2023-11-30 04:03:15,077 INFO L500 AbstractCegarLoop]: Abstraction has has 653 places, 1153 transitions, 53390 flow [2023-11-30 04:03:15,078 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 0 states have call successors, (0), 0 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 04:03:15,078 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:03:15,078 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:15,078 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-30 04:03:15,078 INFO L425 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:03:15,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:03:15,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1548710052, now seen corresponding path program 1 times [2023-11-30 04:03:15,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:03:15,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916159943] [2023-11-30 04:03:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:03:15,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:03:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:03:15,141 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 04:03:15,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:03:15,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916159943] [2023-11-30 04:03:15,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916159943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:03:15,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:03:15,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 04:03:15,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987805106] [2023-11-30 04:03:15,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:03:15,142 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:03:15,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:03:15,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:03:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:03:15,143 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 361 [2023-11-30 04:03:15,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 1153 transitions, 53390 flow. Second operand has 3 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 0 states have call successors, (0), 0 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 04:03:15,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:03:15,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 361 [2023-11-30 04:03:15,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:03:17,550 INFO L124 PetriNetUnfolderBase]: 2494/7404 cut-off events. [2023-11-30 04:03:17,550 INFO L125 PetriNetUnfolderBase]: For 1009302/1015968 co-relation queries the response was YES. [2023-11-30 04:03:17,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101848 conditions, 7404 events. 2494/7404 cut-off events. For 1009302/1015968 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 58697 event pairs, 233 based on Foata normal form. 893/7848 useless extension candidates. Maximal degree in co-relation 92743. Up to 3437 conditions per place. [2023-11-30 04:03:17,652 INFO L140 encePairwiseOnDemand]: 355/361 looper letters, 166 selfloop transitions, 63 changer transitions 82/955 dead transitions. [2023-11-30 04:03:17,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 955 transitions, 42237 flow [2023-11-30 04:03:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:03:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:03:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1017 transitions. [2023-11-30 04:03:17,654 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.9390581717451524 [2023-11-30 04:03:17,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1017 transitions. [2023-11-30 04:03:17,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1017 transitions. [2023-11-30 04:03:17,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:03:17,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1017 transitions. [2023-11-30 04:03:17,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:03:17,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:03:17,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 04:03:17,663 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 317 predicate places. [2023-11-30 04:03:17,663 INFO L500 AbstractCegarLoop]: Abstraction has has 655 places, 955 transitions, 42237 flow [2023-11-30 04:03:17,664 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 0 states have call successors, (0), 0 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 04:03:17,664 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:03:17,664 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:17,664 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-30 04:03:17,664 INFO L425 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:03:17,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:03:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash -36193876, now seen corresponding path program 1 times [2023-11-30 04:03:17,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:03:17,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313634074] [2023-11-30 04:03:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:03:17,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:03:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:03:17,790 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 04:03:17,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:03:17,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313634074] [2023-11-30 04:03:17,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313634074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:03:17,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:03:17,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 04:03:17,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669156471] [2023-11-30 04:03:17,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:03:17,791 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 04:03:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:03:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 04:03:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-30 04:03:17,792 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 361 [2023-11-30 04:03:17,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 955 transitions, 42237 flow. Second operand has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 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 04:03:17,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:03:17,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 361 [2023-11-30 04:03:17,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:03:20,269 INFO L124 PetriNetUnfolderBase]: 2306/6960 cut-off events. [2023-11-30 04:03:20,270 INFO L125 PetriNetUnfolderBase]: For 845613/848302 co-relation queries the response was YES. [2023-11-30 04:03:20,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99070 conditions, 6960 events. 2306/6960 cut-off events. For 845613/848302 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 54409 event pairs, 197 based on Foata normal form. 191/6734 useless extension candidates. Maximal degree in co-relation 90353. Up to 3207 conditions per place. [2023-11-30 04:03:20,346 INFO L140 encePairwiseOnDemand]: 344/361 looper letters, 577 selfloop transitions, 10 changer transitions 82/947 dead transitions. [2023-11-30 04:03:20,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 947 transitions, 43403 flow [2023-11-30 04:03:20,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-30 04:03:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-30 04:03:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2127 transitions. [2023-11-30 04:03:20,347 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.65466297322253 [2023-11-30 04:03:20,347 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2127 transitions. [2023-11-30 04:03:20,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2127 transitions. [2023-11-30 04:03:20,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:03:20,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2127 transitions. [2023-11-30 04:03:20,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 236.33333333333334) internal successors, (2127), 9 states have internal predecessors, (2127), 0 states have call successors, (0), 0 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 04:03:20,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 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 04:03:20,350 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 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 04:03:20,351 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 317 predicate places. [2023-11-30 04:03:20,351 INFO L500 AbstractCegarLoop]: Abstraction has has 655 places, 947 transitions, 43403 flow [2023-11-30 04:03:20,351 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 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 04:03:20,351 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:03:20,351 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:20,351 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-30 04:03:20,351 INFO L425 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:03:20,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:03:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash -36193875, now seen corresponding path program 1 times [2023-11-30 04:03:20,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:03:20,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246766495] [2023-11-30 04:03:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:03:20,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:03:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:03:20,567 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 04:03:20,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:03:20,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246766495] [2023-11-30 04:03:20,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246766495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:03:20,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:03:20,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-30 04:03:20,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267237487] [2023-11-30 04:03:20,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:03:20,568 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-30 04:03:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:03:20,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-30 04:03:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-30 04:03:20,570 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 361 [2023-11-30 04:03:20,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 947 transitions, 43403 flow. Second operand has 10 states, 10 states have (on average 228.6) internal successors, (2286), 10 states have internal predecessors, (2286), 0 states have call successors, (0), 0 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 04:03:20,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:03:20,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 361 [2023-11-30 04:03:20,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:03:22,684 INFO L124 PetriNetUnfolderBase]: 2086/6496 cut-off events. [2023-11-30 04:03:22,684 INFO L125 PetriNetUnfolderBase]: For 833892/836531 co-relation queries the response was YES. [2023-11-30 04:03:22,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95713 conditions, 6496 events. 2086/6496 cut-off events. For 833892/836531 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 50339 event pairs, 157 based on Foata normal form. 181/6302 useless extension candidates. Maximal degree in co-relation 87745. Up to 2947 conditions per place. [2023-11-30 04:03:22,762 INFO L140 encePairwiseOnDemand]: 340/361 looper letters, 559 selfloop transitions, 15 changer transitions 82/927 dead transitions. [2023-11-30 04:03:22,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 927 transitions, 43955 flow [2023-11-30 04:03:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-30 04:03:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-30 04:03:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2767 transitions. [2023-11-30 04:03:22,764 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6387349953831948 [2023-11-30 04:03:22,764 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2767 transitions. [2023-11-30 04:03:22,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2767 transitions. [2023-11-30 04:03:22,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:03:22,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2767 transitions. [2023-11-30 04:03:22,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.58333333333334) internal successors, (2767), 12 states have internal predecessors, (2767), 0 states have call successors, (0), 0 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 04:03:22,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 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 04:03:22,768 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 361.0) internal successors, (4693), 13 states have internal predecessors, (4693), 0 states have call successors, (0), 0 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 04:03:22,769 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 321 predicate places. [2023-11-30 04:03:22,769 INFO L500 AbstractCegarLoop]: Abstraction has has 659 places, 927 transitions, 43955 flow [2023-11-30 04:03:22,769 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 228.6) internal successors, (2286), 10 states have internal predecessors, (2286), 0 states have call successors, (0), 0 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 04:03:22,769 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:03:22,769 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:22,769 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-30 04:03:22,769 INFO L425 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:03:22,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:03:22,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1122009171, now seen corresponding path program 1 times [2023-11-30 04:03:22,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:03:22,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569468830] [2023-11-30 04:03:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:03:22,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:03:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:03:23,567 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 04:03:23,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:03:23,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569468830] [2023-11-30 04:03:23,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569468830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:03:23,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:03:23,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-30 04:03:23,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764057135] [2023-11-30 04:03:23,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:03:23,568 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-30 04:03:23,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:03:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-30 04:03:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-11-30 04:03:23,570 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 361 [2023-11-30 04:03:23,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 927 transitions, 43955 flow. Second operand has 19 states, 19 states have (on average 173.1578947368421) internal successors, (3290), 19 states have internal predecessors, (3290), 0 states have call successors, (0), 0 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 04:03:23,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:03:23,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 361 [2023-11-30 04:03:23,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:03:25,554 INFO L124 PetriNetUnfolderBase]: 1482/4722 cut-off events. [2023-11-30 04:03:25,554 INFO L125 PetriNetUnfolderBase]: For 602938/604910 co-relation queries the response was YES. [2023-11-30 04:03:25,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71191 conditions, 4722 events. 1482/4722 cut-off events. For 602938/604910 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 33334 event pairs, 110 based on Foata normal form. 6/4466 useless extension candidates. Maximal degree in co-relation 65313. Up to 2113 conditions per place. [2023-11-30 04:03:25,622 INFO L140 encePairwiseOnDemand]: 335/361 looper letters, 455 selfloop transitions, 57 changer transitions 56/749 dead transitions. [2023-11-30 04:03:25,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 749 transitions, 34889 flow [2023-11-30 04:03:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-30 04:03:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-30 04:03:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3678 transitions. [2023-11-30 04:03:25,625 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4851602690937871 [2023-11-30 04:03:25,625 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3678 transitions. [2023-11-30 04:03:25,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3678 transitions. [2023-11-30 04:03:25,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:03:25,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3678 transitions. [2023-11-30 04:03:25,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 175.14285714285714) internal successors, (3678), 21 states have internal predecessors, (3678), 0 states have call successors, (0), 0 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 04:03:25,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 0 states have call successors, (0), 0 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 04:03:25,635 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 0 states have call successors, (0), 0 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 04:03:25,635 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 330 predicate places. [2023-11-30 04:03:25,635 INFO L500 AbstractCegarLoop]: Abstraction has has 668 places, 749 transitions, 34889 flow [2023-11-30 04:03:25,635 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 173.1578947368421) internal successors, (3290), 19 states have internal predecessors, (3290), 0 states have call successors, (0), 0 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 04:03:25,636 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:03:25,636 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:25,636 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-30 04:03:25,636 INFO L425 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:03:25,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:03:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1647219156, now seen corresponding path program 1 times [2023-11-30 04:03:25,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:03:25,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090791954] [2023-11-30 04:03:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:03:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:03:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:03:27,668 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 04:03:27,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:03:27,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090791954] [2023-11-30 04:03:27,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090791954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:03:27,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:03:27,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-11-30 04:03:27,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142322386] [2023-11-30 04:03:27,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:03:27,669 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-30 04:03:27,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:03:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-30 04:03:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-11-30 04:03:27,672 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 361 [2023-11-30 04:03:27,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 749 transitions, 34889 flow. Second operand has 29 states, 29 states have (on average 168.06896551724137) internal successors, (4874), 29 states have internal predecessors, (4874), 0 states have call successors, (0), 0 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 04:03:27,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:03:27,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 361 [2023-11-30 04:03:27,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:03:30,327 INFO L124 PetriNetUnfolderBase]: 1468/4680 cut-off events. [2023-11-30 04:03:30,327 INFO L125 PetriNetUnfolderBase]: For 632072/634223 co-relation queries the response was YES. [2023-11-30 04:03:30,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72977 conditions, 4680 events. 1468/4680 cut-off events. For 632072/634223 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 32959 event pairs, 113 based on Foata normal form. 14/4437 useless extension candidates. Maximal degree in co-relation 66908. Up to 2094 conditions per place. [2023-11-30 04:03:30,403 INFO L140 encePairwiseOnDemand]: 320/361 looper letters, 436 selfloop transitions, 119 changer transitions 56/754 dead transitions. [2023-11-30 04:03:30,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 754 transitions, 36226 flow [2023-11-30 04:03:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-30 04:03:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-30 04:03:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5634 transitions. [2023-11-30 04:03:30,406 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.47292873331654495 [2023-11-30 04:03:30,406 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5634 transitions. [2023-11-30 04:03:30,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5634 transitions. [2023-11-30 04:03:30,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:03:30,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5634 transitions. [2023-11-30 04:03:30,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 170.72727272727272) internal successors, (5634), 33 states have internal predecessors, (5634), 0 states have call successors, (0), 0 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 04:03:30,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 361.0) internal successors, (12274), 34 states have internal predecessors, (12274), 0 states have call successors, (0), 0 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 04:03:30,415 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 361.0) internal successors, (12274), 34 states have internal predecessors, (12274), 0 states have call successors, (0), 0 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 04:03:30,416 INFO L307 CegarLoopForPetriNet]: 338 programPoint places, 362 predicate places. [2023-11-30 04:03:30,416 INFO L500 AbstractCegarLoop]: Abstraction has has 700 places, 754 transitions, 36226 flow [2023-11-30 04:03:30,416 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 168.06896551724137) internal successors, (4874), 29 states have internal predecessors, (4874), 0 states have call successors, (0), 0 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 04:03:30,416 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:03:30,416 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:30,417 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-30 04:03:30,417 INFO L425 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 133 more)] === [2023-11-30 04:03:30,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:03:30,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1202716229, now seen corresponding path program 1 times [2023-11-30 04:03:30,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:03:30,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065983479] [2023-11-30 04:03:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:03:30,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:03:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-11-30 04:14:39,616 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-30 04:14:39,752 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-30 04:14:39,755 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Termination requested (timeout or resource limit) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:152) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:869) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:793) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:283) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:296) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:219) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:148) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-30 04:14:39,759 INFO L158 Benchmark]: Toolchain (without parser) took 831179.92ms. Allocated memory was 362.8MB in the beginning and 15.3GB in the end (delta: 14.9GB). Free memory was 311.0MB in the beginning and 10.0GB in the end (delta: -9.7GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. [2023-11-30 04:14:39,759 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 362.8MB. Free memory was 313.4MB in the beginning and 313.2MB in the end (delta: 174.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-11-30 04:14:39,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 445.41ms. Allocated memory is still 362.8MB. Free memory was 311.0MB in the beginning and 280.3MB in the end (delta: 30.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-11-30 04:14:39,761 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.74ms. Allocated memory is still 362.8MB. Free memory was 280.3MB in the beginning and 277.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-11-30 04:14:39,761 INFO L158 Benchmark]: Boogie Preprocessor took 37.93ms. Allocated memory is still 362.8MB. Free memory was 277.2MB in the beginning and 274.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-11-30 04:14:39,764 INFO L158 Benchmark]: RCFGBuilder took 725.18ms. Allocated memory was 362.8MB in the beginning and 635.4MB in the end (delta: 272.6MB). Free memory was 274.7MB in the beginning and 568.5MB in the end (delta: -293.8MB). Peak memory consumption was 13.4MB. Max. memory is 16.0GB. [2023-11-30 04:14:39,764 INFO L158 Benchmark]: TraceAbstraction took 829904.48ms. Allocated memory was 635.4MB in the beginning and 15.3GB in the end (delta: 14.6GB). Free memory was 568.5MB in the beginning and 10.0GB in the end (delta: -9.5GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. [2023-11-30 04:14:39,766 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 362.8MB. Free memory was 313.4MB in the beginning and 313.2MB in the end (delta: 174.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 445.41ms. Allocated memory is still 362.8MB. Free memory was 311.0MB in the beginning and 280.3MB in the end (delta: 30.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 62.74ms. Allocated memory is still 362.8MB. Free memory was 280.3MB in the beginning and 277.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 37.93ms. Allocated memory is still 362.8MB. Free memory was 277.2MB in the beginning and 274.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 725.18ms. Allocated memory was 362.8MB in the beginning and 635.4MB in the end (delta: 272.6MB). Free memory was 274.7MB in the beginning and 568.5MB in the end (delta: -293.8MB). Peak memory consumption was 13.4MB. Max. memory is 16.0GB. * TraceAbstraction took 829904.48ms. Allocated memory was 635.4MB in the beginning and 15.3GB in the end (delta: 14.6GB). Free memory was 568.5MB in the beginning and 10.0GB in the end (delta: -9.5GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Termination requested (timeout or resource limit) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Termination requested (timeout or resource limit): de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown