/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-ext/02_inc_cas.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 04:16:06,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 04:16:06,723 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 04:16:06,746 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 04:16:06,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 04:16:06,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 04:16:06,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 04:16:06,748 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 04:16:06,749 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 04:16:06,752 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 04:16:06,752 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 04:16:06,752 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 04:16:06,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 04:16:06,753 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 04:16:06,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 04:16:06,754 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 04:16:06,754 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 04:16:06,754 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 04:16:06,754 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 04:16:06,754 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 04:16:06,754 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 04:16:06,755 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 04:16:06,755 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 04:16:06,755 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 04:16:06,755 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 04:16:06,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 04:16:06,757 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 04:16:06,757 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 04:16:06,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 04:16:06,758 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 04:16:06,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 04:16:06,758 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 04:16:06,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 04:16:06,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 04:16:06,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 04:16:06,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 04:16:06,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 04:16:06,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 04:16:06,996 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 04:16:07,000 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/02_inc_cas.i [2023-11-30 04:16:07,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 04:16:08,224 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 04:16:08,225 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/02_inc_cas.i [2023-11-30 04:16:08,234 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef73d9b04/725cceea740d46028238159293eb8352/FLAGf6f80dc02 [2023-11-30 04:16:08,245 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef73d9b04/725cceea740d46028238159293eb8352 [2023-11-30 04:16:08,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 04:16:08,247 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 04:16:08,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 04:16:08,248 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 04:16:08,250 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 04:16:08,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389bc002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08, skipping insertion in model container [2023-11-30 04:16:08,251 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,290 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 04:16:08,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 04:16:08,527 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 04:16:08,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 04:16:08,589 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-30 04:16:08,589 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-30 04:16:08,594 INFO L206 MainTranslator]: Completed translation [2023-11-30 04:16:08,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08 WrapperNode [2023-11-30 04:16:08,595 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 04:16:08,596 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 04:16:08,596 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 04:16:08,596 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 04:16:08,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,625 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,645 INFO L138 Inliner]: procedures = 170, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-11-30 04:16:08,645 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 04:16:08,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 04:16:08,646 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 04:16:08,646 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 04:16:08,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,659 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,670 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,672 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,673 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 04:16:08,676 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 04:16:08,676 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 04:16:08,676 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 04:16:08,692 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (1/1) ... [2023-11-30 04:16:08,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 04:16:08,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:16:08,715 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 04:16:08,748 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 04:16:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 04:16:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-30 04:16:08,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-30 04:16:08,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 04:16:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-30 04:16:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 04:16:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 04:16:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 04:16:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 04:16:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-30 04:16:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 04:16:08,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 04:16:08,755 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 04:16:08,858 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 04:16:08,861 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 04:16:09,066 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 04:16:09,184 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 04:16:09,184 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-30 04:16:09,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 04:16:09 BoogieIcfgContainer [2023-11-30 04:16:09,186 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 04:16:09,187 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 04:16:09,187 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 04:16:09,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 04:16:09,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 04:16:08" (1/3) ... [2023-11-30 04:16:09,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3387d783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 04:16:09, skipping insertion in model container [2023-11-30 04:16:09,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:16:08" (2/3) ... [2023-11-30 04:16:09,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3387d783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 04:16:09, skipping insertion in model container [2023-11-30 04:16:09,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 04:16:09" (3/3) ... [2023-11-30 04:16:09,191 INFO L112 eAbstractionObserver]: Analyzing ICFG 02_inc_cas.i [2023-11-30 04:16:09,202 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 04:16:09,202 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-30 04:16:09,203 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 04:16:09,261 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-30 04:16:09,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 136 flow [2023-11-30 04:16:09,318 INFO L124 PetriNetUnfolderBase]: 5/79 cut-off events. [2023-11-30 04:16:09,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:16:09,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 79 events. 5/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 226 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2023-11-30 04:16:09,323 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 136 flow [2023-11-30 04:16:09,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 66 transitions, 136 flow [2023-11-30 04:16:09,339 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 04:16:09,347 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;@74bab840, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 04:16:09,347 INFO L363 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-30 04:16:09,356 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 04:16:09,356 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-30 04:16:09,356 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:16:09,356 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:09,357 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:16:09,357 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 04:16:09,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1314413243, now seen corresponding path program 1 times [2023-11-30 04:16:09,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:09,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211046831] [2023-11-30 04:16:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:09,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:09,586 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 04:16:09,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211046831] [2023-11-30 04:16:09,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211046831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:09,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:09,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:09,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194032831] [2023-11-30 04:16:09,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:09,596 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:09,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:09,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:09,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:09,622 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2023-11-30 04:16:09,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:09,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2023-11-30 04:16:09,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:09,736 INFO L124 PetriNetUnfolderBase]: 40/162 cut-off events. [2023-11-30 04:16:09,736 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:16:09,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 162 events. 40/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 870 event pairs, 32 based on Foata normal form. 20/120 useless extension candidates. Maximal degree in co-relation 235. Up to 88 conditions per place. [2023-11-30 04:16:09,740 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 26 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-11-30 04:16:09,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 180 flow [2023-11-30 04:16:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:16:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:16:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-11-30 04:16:09,750 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2023-11-30 04:16:09,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-11-30 04:16:09,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-11-30 04:16:09,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:09,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-11-30 04:16:09,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,764 INFO L307 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-11-30 04:16:09,765 INFO L500 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 180 flow [2023-11-30 04:16:09,765 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,765 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:09,765 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:16:09,765 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 04:16:09,765 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 04:16:09,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:09,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1314413244, now seen corresponding path program 1 times [2023-11-30 04:16:09,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:09,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632817633] [2023-11-30 04:16:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:09,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:09,885 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 04:16:09,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:09,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632817633] [2023-11-30 04:16:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632817633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:09,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:09,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:09,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469838003] [2023-11-30 04:16:09,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:09,890 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:09,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:09,891 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2023-11-30 04:16:09,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:09,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2023-11-30 04:16:09,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:09,963 INFO L124 PetriNetUnfolderBase]: 21/112 cut-off events. [2023-11-30 04:16:09,963 INFO L125 PetriNetUnfolderBase]: For 15/17 co-relation queries the response was YES. [2023-11-30 04:16:09,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 112 events. 21/112 cut-off events. For 15/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 484 event pairs, 17 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 204. Up to 57 conditions per place. [2023-11-30 04:16:09,965 INFO L140 encePairwiseOnDemand]: 64/66 looper letters, 24 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-11-30 04:16:09,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 222 flow [2023-11-30 04:16:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:16:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:16:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-11-30 04:16:09,969 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2023-11-30 04:16:09,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-11-30 04:16:09,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-11-30 04:16:09,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:09,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-11-30 04:16:09,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,971 INFO L307 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-11-30 04:16:09,971 INFO L500 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 222 flow [2023-11-30 04:16:09,972 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:09,972 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:09,972 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] [2023-11-30 04:16:09,972 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 04:16:09,972 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 04:16:09,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:09,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1955941897, now seen corresponding path program 1 times [2023-11-30 04:16:09,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:09,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887474135] [2023-11-30 04:16:09,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:09,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:10,165 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 04:16:10,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:10,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887474135] [2023-11-30 04:16:10,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887474135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:10,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:10,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-30 04:16:10,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660094239] [2023-11-30 04:16:10,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:10,169 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-30 04:16:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-30 04:16:10,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-30 04:16:10,173 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2023-11-30 04:16:10,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:10,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2023-11-30 04:16:10,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:10,248 INFO L124 PetriNetUnfolderBase]: 18/103 cut-off events. [2023-11-30 04:16:10,249 INFO L125 PetriNetUnfolderBase]: For 43/47 co-relation queries the response was YES. [2023-11-30 04:16:10,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 103 events. 18/103 cut-off events. For 43/47 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 411 event pairs, 14 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 226. Up to 48 conditions per place. [2023-11-30 04:16:10,250 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 22 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-11-30 04:16:10,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 258 flow [2023-11-30 04:16:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-30 04:16:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-30 04:16:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2023-11-30 04:16:10,252 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-30 04:16:10,253 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 170 transitions. [2023-11-30 04:16:10,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 170 transitions. [2023-11-30 04:16:10,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:10,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 170 transitions. [2023-11-30 04:16:10,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,254 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,255 INFO L307 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-11-30 04:16:10,255 INFO L500 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 258 flow [2023-11-30 04:16:10,255 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,255 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:10,255 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] [2023-11-30 04:16:10,255 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-30 04:16:10,256 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 04:16:10,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1955941896, now seen corresponding path program 1 times [2023-11-30 04:16:10,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:10,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646183052] [2023-11-30 04:16:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:10,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:10,434 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 04:16:10,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:10,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646183052] [2023-11-30 04:16:10,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646183052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:10,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:10,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:16:10,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990947503] [2023-11-30 04:16:10,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:10,436 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:16:10,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:10,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:16:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:16:10,440 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2023-11-30 04:16:10,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 7 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:10,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2023-11-30 04:16:10,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:10,508 INFO L124 PetriNetUnfolderBase]: 15/94 cut-off events. [2023-11-30 04:16:10,508 INFO L125 PetriNetUnfolderBase]: For 84/90 co-relation queries the response was YES. [2023-11-30 04:16:10,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 94 events. 15/94 cut-off events. For 84/90 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 330 event pairs, 11 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 232. Up to 39 conditions per place. [2023-11-30 04:16:10,511 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 20 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-30 04:16:10,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 50 transitions, 284 flow [2023-11-30 04:16:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:16:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:16:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2023-11-30 04:16:10,513 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2023-11-30 04:16:10,513 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 190 transitions. [2023-11-30 04:16:10,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 190 transitions. [2023-11-30 04:16:10,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:10,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 190 transitions. [2023-11-30 04:16:10,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,517 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,518 INFO L307 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-11-30 04:16:10,518 INFO L500 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 284 flow [2023-11-30 04:16:10,518 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 7 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,518 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:10,518 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:16:10,519 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 04:16:10,519 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-30 04:16:10,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:10,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1974555645, now seen corresponding path program 1 times [2023-11-30 04:16:10,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:10,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189835164] [2023-11-30 04:16:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:10,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 04:16:10,531 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 04:16:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 04:16:10,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 04:16:10,553 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 04:16:10,554 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2023-11-30 04:16:10,555 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2023-11-30 04:16:10,556 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2023-11-30 04:16:10,556 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2023-11-30 04:16:10,556 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2023-11-30 04:16:10,556 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 31 remaining) [2023-11-30 04:16:10,556 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 31 remaining) [2023-11-30 04:16:10,556 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2023-11-30 04:16:10,556 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2023-11-30 04:16:10,556 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2023-11-30 04:16:10,557 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2023-11-30 04:16:10,557 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2023-11-30 04:16:10,557 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2023-11-30 04:16:10,557 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2023-11-30 04:16:10,557 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2023-11-30 04:16:10,557 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2023-11-30 04:16:10,557 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2023-11-30 04:16:10,557 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2023-11-30 04:16:10,558 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2023-11-30 04:16:10,558 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2023-11-30 04:16:10,558 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2023-11-30 04:16:10,558 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2023-11-30 04:16:10,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2023-11-30 04:16:10,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 31 remaining) [2023-11-30 04:16:10,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2023-11-30 04:16:10,559 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2023-11-30 04:16:10,562 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2023-11-30 04:16:10,562 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2023-11-30 04:16:10,562 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2023-11-30 04:16:10,562 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2023-11-30 04:16:10,562 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2023-11-30 04:16:10,563 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-30 04:16:10,563 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-30 04:16:10,565 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 04:16:10,565 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-30 04:16:10,610 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-30 04:16:10,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 218 flow [2023-11-30 04:16:10,623 INFO L124 PetriNetUnfolderBase]: 9/132 cut-off events. [2023-11-30 04:16:10,623 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-30 04:16:10,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 132 events. 9/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 460 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-11-30 04:16:10,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 104 transitions, 218 flow [2023-11-30 04:16:10,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 104 transitions, 218 flow [2023-11-30 04:16:10,626 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 04:16:10,626 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;@74bab840, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 04:16:10,627 INFO L363 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-11-30 04:16:10,628 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 04:16:10,628 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-30 04:16:10,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:16:10,628 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:10,628 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:16:10,628 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-30 04:16:10,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:10,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1725054277, now seen corresponding path program 1 times [2023-11-30 04:16:10,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:10,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359037354] [2023-11-30 04:16:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:10,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:10,646 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 04:16:10,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:10,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359037354] [2023-11-30 04:16:10,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359037354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:10,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:10,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:10,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107639408] [2023-11-30 04:16:10,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:10,647 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:10,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:10,648 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 104 [2023-11-30 04:16:10,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:10,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:10,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 104 [2023-11-30 04:16:10,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:11,071 INFO L124 PetriNetUnfolderBase]: 2065/4394 cut-off events. [2023-11-30 04:16:11,071 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-30 04:16:11,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7717 conditions, 4394 events. 2065/4394 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 40883 event pairs, 1526 based on Foata normal form. 413/2745 useless extension candidates. Maximal degree in co-relation 2489. Up to 2585 conditions per place. [2023-11-30 04:16:11,099 INFO L140 encePairwiseOnDemand]: 89/104 looper letters, 80 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2023-11-30 04:16:11,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 447 flow [2023-11-30 04:16:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:16:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:16:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-11-30 04:16:11,100 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7724358974358975 [2023-11-30 04:16:11,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-11-30 04:16:11,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-11-30 04:16:11,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:11,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-11-30 04:16:11,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,102 INFO L307 CegarLoopForPetriNet]: 102 programPoint places, -8 predicate places. [2023-11-30 04:16:11,102 INFO L500 AbstractCegarLoop]: Abstraction has has 94 places, 130 transitions, 447 flow [2023-11-30 04:16:11,103 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,103 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:11,103 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:16:11,103 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-30 04:16:11,103 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-30 04:16:11,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:11,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1725054276, now seen corresponding path program 1 times [2023-11-30 04:16:11,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:11,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241502824] [2023-11-30 04:16:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:11,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:11,126 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 04:16:11,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:11,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241502824] [2023-11-30 04:16:11,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241502824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:11,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:11,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:11,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35733844] [2023-11-30 04:16:11,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:11,127 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:11,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:11,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:11,127 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 104 [2023-11-30 04:16:11,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 130 transitions, 447 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:11,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 104 [2023-11-30 04:16:11,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:11,422 INFO L124 PetriNetUnfolderBase]: 1382/3106 cut-off events. [2023-11-30 04:16:11,422 INFO L125 PetriNetUnfolderBase]: For 463/556 co-relation queries the response was YES. [2023-11-30 04:16:11,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 3106 events. 1382/3106 cut-off events. For 463/556 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 27559 event pairs, 1043 based on Foata normal form. 0/1987 useless extension candidates. Maximal degree in co-relation 2546. Up to 2021 conditions per place. [2023-11-30 04:16:11,439 INFO L140 encePairwiseOnDemand]: 102/104 looper letters, 72 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-11-30 04:16:11,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 128 transitions, 585 flow [2023-11-30 04:16:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:16:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:16:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2023-11-30 04:16:11,441 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-30 04:16:11,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 195 transitions. [2023-11-30 04:16:11,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 195 transitions. [2023-11-30 04:16:11,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:11,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 195 transitions. [2023-11-30 04:16:11,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,443 INFO L307 CegarLoopForPetriNet]: 102 programPoint places, -7 predicate places. [2023-11-30 04:16:11,444 INFO L500 AbstractCegarLoop]: Abstraction has has 95 places, 128 transitions, 585 flow [2023-11-30 04:16:11,444 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,444 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:11,444 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] [2023-11-30 04:16:11,444 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-30 04:16:11,444 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-30 04:16:11,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 590517975, now seen corresponding path program 1 times [2023-11-30 04:16:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:11,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927692032] [2023-11-30 04:16:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:11,537 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 04:16:11,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:11,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927692032] [2023-11-30 04:16:11,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927692032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:11,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:11,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-30 04:16:11,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997220702] [2023-11-30 04:16:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:11,539 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-30 04:16:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-30 04:16:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-30 04:16:11,540 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 104 [2023-11-30 04:16:11,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 128 transitions, 585 flow. Second operand has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:11,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 104 [2023-11-30 04:16:11,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:11,889 INFO L124 PetriNetUnfolderBase]: 1181/2977 cut-off events. [2023-11-30 04:16:11,890 INFO L125 PetriNetUnfolderBase]: For 1045/1212 co-relation queries the response was YES. [2023-11-30 04:16:11,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8946 conditions, 2977 events. 1181/2977 cut-off events. For 1045/1212 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 27494 event pairs, 664 based on Foata normal form. 8/1999 useless extension candidates. Maximal degree in co-relation 2999. Up to 1832 conditions per place. [2023-11-30 04:16:11,915 INFO L140 encePairwiseOnDemand]: 77/104 looper letters, 134 selfloop transitions, 43 changer transitions 0/219 dead transitions. [2023-11-30 04:16:11,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 219 transitions, 1454 flow [2023-11-30 04:16:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:16:11,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:16:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 386 transitions. [2023-11-30 04:16:11,918 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6185897435897436 [2023-11-30 04:16:11,918 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 386 transitions. [2023-11-30 04:16:11,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 386 transitions. [2023-11-30 04:16:11,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:11,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 386 transitions. [2023-11-30 04:16:11,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.33333333333333) internal successors, (386), 6 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,920 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,921 INFO L307 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2023-11-30 04:16:11,921 INFO L500 AbstractCegarLoop]: Abstraction has has 100 places, 219 transitions, 1454 flow [2023-11-30 04:16:11,921 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:11,921 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:11,921 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] [2023-11-30 04:16:11,921 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-30 04:16:11,921 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-30 04:16:11,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:11,922 INFO L85 PathProgramCache]: Analyzing trace with hash 590517976, now seen corresponding path program 1 times [2023-11-30 04:16:11,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:11,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802776596] [2023-11-30 04:16:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:11,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:12,069 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 04:16:12,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802776596] [2023-11-30 04:16:12,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802776596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:12,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:12,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:16:12,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375747587] [2023-11-30 04:16:12,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:12,070 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:16:12,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:12,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:16:12,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:16:12,071 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 104 [2023-11-30 04:16:12,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 219 transitions, 1454 flow. Second operand has 7 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:12,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 104 [2023-11-30 04:16:12,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:12,330 INFO L124 PetriNetUnfolderBase]: 860/2292 cut-off events. [2023-11-30 04:16:12,330 INFO L125 PetriNetUnfolderBase]: For 1621/1819 co-relation queries the response was YES. [2023-11-30 04:16:12,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8116 conditions, 2292 events. 860/2292 cut-off events. For 1621/1819 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 20239 event pairs, 423 based on Foata normal form. 16/1703 useless extension candidates. Maximal degree in co-relation 2793. Up to 1289 conditions per place. [2023-11-30 04:16:12,344 INFO L140 encePairwiseOnDemand]: 77/104 looper letters, 108 selfloop transitions, 43 changer transitions 0/191 dead transitions. [2023-11-30 04:16:12,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 191 transitions, 1524 flow [2023-11-30 04:16:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:16:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:16:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 337 transitions. [2023-11-30 04:16:12,348 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5400641025641025 [2023-11-30 04:16:12,348 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 337 transitions. [2023-11-30 04:16:12,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 337 transitions. [2023-11-30 04:16:12,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:12,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 337 transitions. [2023-11-30 04:16:12,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.166666666666664) internal successors, (337), 6 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,350 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,352 INFO L307 CegarLoopForPetriNet]: 102 programPoint places, -3 predicate places. [2023-11-30 04:16:12,352 INFO L500 AbstractCegarLoop]: Abstraction has has 99 places, 191 transitions, 1524 flow [2023-11-30 04:16:12,352 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,352 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:12,352 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] [2023-11-30 04:16:12,352 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-30 04:16:12,352 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-30 04:16:12,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash -64588348, now seen corresponding path program 1 times [2023-11-30 04:16:12,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:12,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949028666] [2023-11-30 04:16:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:12,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:12,400 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 04:16:12,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:12,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949028666] [2023-11-30 04:16:12,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949028666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:12,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:12,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:12,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697748707] [2023-11-30 04:16:12,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:12,401 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:12,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:12,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:12,402 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 104 [2023-11-30 04:16:12,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 191 transitions, 1524 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:12,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 104 [2023-11-30 04:16:12,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:12,713 INFO L124 PetriNetUnfolderBase]: 1073/2615 cut-off events. [2023-11-30 04:16:12,713 INFO L125 PetriNetUnfolderBase]: For 3073/3137 co-relation queries the response was YES. [2023-11-30 04:16:12,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10596 conditions, 2615 events. 1073/2615 cut-off events. For 3073/3137 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 23040 event pairs, 144 based on Foata normal form. 34/1990 useless extension candidates. Maximal degree in co-relation 9486. Up to 1380 conditions per place. [2023-11-30 04:16:12,729 INFO L140 encePairwiseOnDemand]: 94/104 looper letters, 162 selfloop transitions, 17 changer transitions 0/222 dead transitions. [2023-11-30 04:16:12,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 222 transitions, 2189 flow [2023-11-30 04:16:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:16:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:16:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-11-30 04:16:12,730 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6794871794871795 [2023-11-30 04:16:12,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-11-30 04:16:12,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-11-30 04:16:12,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:12,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-11-30 04:16:12,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,732 INFO L307 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2023-11-30 04:16:12,733 INFO L500 AbstractCegarLoop]: Abstraction has has 101 places, 222 transitions, 2189 flow [2023-11-30 04:16:12,733 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,733 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:12,733 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] [2023-11-30 04:16:12,733 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-30 04:16:12,733 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-30 04:16:12,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:12,734 INFO L85 PathProgramCache]: Analyzing trace with hash -64588347, now seen corresponding path program 1 times [2023-11-30 04:16:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:12,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741175842] [2023-11-30 04:16:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:12,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:12,819 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 04:16:12,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741175842] [2023-11-30 04:16:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741175842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:12,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685069920] [2023-11-30 04:16:12,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:12,821 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:12,822 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 104 [2023-11-30 04:16:12,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 222 transitions, 2189 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:12,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:12,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 104 [2023-11-30 04:16:12,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:13,091 INFO L124 PetriNetUnfolderBase]: 929/2340 cut-off events. [2023-11-30 04:16:13,092 INFO L125 PetriNetUnfolderBase]: For 4958/5058 co-relation queries the response was YES. [2023-11-30 04:16:13,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10316 conditions, 2340 events. 929/2340 cut-off events. For 4958/5058 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 20396 event pairs, 58 based on Foata normal form. 46/1998 useless extension candidates. Maximal degree in co-relation 9155. Up to 1119 conditions per place. [2023-11-30 04:16:13,110 INFO L140 encePairwiseOnDemand]: 98/104 looper letters, 185 selfloop transitions, 5 changer transitions 0/254 dead transitions. [2023-11-30 04:16:13,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 254 transitions, 2959 flow [2023-11-30 04:16:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:16:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:16:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-11-30 04:16:13,111 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2023-11-30 04:16:13,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-11-30 04:16:13,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-11-30 04:16:13,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:13,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-11-30 04:16:13,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:13,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:13,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:13,113 INFO L307 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2023-11-30 04:16:13,113 INFO L500 AbstractCegarLoop]: Abstraction has has 100 places, 254 transitions, 2959 flow [2023-11-30 04:16:13,113 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:13,113 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:13,113 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:16:13,113 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-30 04:16:13,113 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-11-30 04:16:13,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2010249708, now seen corresponding path program 1 times [2023-11-30 04:16:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:13,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466927692] [2023-11-30 04:16:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 04:16:13,126 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 04:16:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 04:16:13,132 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 04:16:13,132 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 04:16:13,132 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2023-11-30 04:16:13,132 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 45 remaining) [2023-11-30 04:16:13,133 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 45 remaining) [2023-11-30 04:16:13,134 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 45 remaining) [2023-11-30 04:16:13,134 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 45 remaining) [2023-11-30 04:16:13,134 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 45 remaining) [2023-11-30 04:16:13,134 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 45 remaining) [2023-11-30 04:16:13,134 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 45 remaining) [2023-11-30 04:16:13,134 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 45 remaining) [2023-11-30 04:16:13,134 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 45 remaining) [2023-11-30 04:16:13,134 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 45 remaining) [2023-11-30 04:16:13,134 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 45 remaining) [2023-11-30 04:16:13,135 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 45 remaining) [2023-11-30 04:16:13,136 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 45 remaining) [2023-11-30 04:16:13,137 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 45 remaining) [2023-11-30 04:16:13,137 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 45 remaining) [2023-11-30 04:16:13,137 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 45 remaining) [2023-11-30 04:16:13,137 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 45 remaining) [2023-11-30 04:16:13,137 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-30 04:16:13,137 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:16:13,138 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 04:16:13,138 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-30 04:16:13,179 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-30 04:16:13,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 142 transitions, 302 flow [2023-11-30 04:16:13,193 INFO L124 PetriNetUnfolderBase]: 13/185 cut-off events. [2023-11-30 04:16:13,193 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-30 04:16:13,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 185 events. 13/185 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 699 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2023-11-30 04:16:13,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 142 transitions, 302 flow [2023-11-30 04:16:13,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 142 transitions, 302 flow [2023-11-30 04:16:13,196 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 04:16:13,196 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;@74bab840, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 04:16:13,196 INFO L363 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2023-11-30 04:16:13,197 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 04:16:13,197 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-30 04:16:13,197 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:16:13,197 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:13,197 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:16:13,197 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:16:13,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1332342597, now seen corresponding path program 1 times [2023-11-30 04:16:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:13,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808313045] [2023-11-30 04:16:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:13,210 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 04:16:13,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:13,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808313045] [2023-11-30 04:16:13,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808313045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:13,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:13,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:13,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075483773] [2023-11-30 04:16:13,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:13,211 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:13,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:13,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:13,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:13,212 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-11-30 04:16:13,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 142 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:13,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:13,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-11-30 04:16:13,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:23,353 INFO L124 PetriNetUnfolderBase]: 69101/117596 cut-off events. [2023-11-30 04:16:23,354 INFO L125 PetriNetUnfolderBase]: For 5643/5643 co-relation queries the response was YES. [2023-11-30 04:16:23,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212495 conditions, 117596 events. 69101/117596 cut-off events. For 5643/5643 co-relation queries the response was YES. Maximal size of possible extension queue 10076. Compared 1300569 event pairs, 46770 based on Foata normal form. 8458/67571 useless extension candidates. Maximal degree in co-relation 13905. Up to 66718 conditions per place. [2023-11-30 04:16:24,326 INFO L140 encePairwiseOnDemand]: 122/142 looper letters, 116 selfloop transitions, 8 changer transitions 0/184 dead transitions. [2023-11-30 04:16:24,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 184 transitions, 646 flow [2023-11-30 04:16:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:16:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:16:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-11-30 04:16:24,330 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7816901408450704 [2023-11-30 04:16:24,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-11-30 04:16:24,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-11-30 04:16:24,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:24,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-11-30 04:16:24,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:24,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:24,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:24,333 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, -10 predicate places. [2023-11-30 04:16:24,334 INFO L500 AbstractCegarLoop]: Abstraction has has 129 places, 184 transitions, 646 flow [2023-11-30 04:16:24,334 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:24,334 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:24,334 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:16:24,334 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-30 04:16:24,335 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:16:24,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1332342596, now seen corresponding path program 1 times [2023-11-30 04:16:24,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:24,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992990686] [2023-11-30 04:16:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:24,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:24,380 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 04:16:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992990686] [2023-11-30 04:16:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992990686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:24,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:24,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426453369] [2023-11-30 04:16:24,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:24,381 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:24,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:24,382 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2023-11-30 04:16:24,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 184 transitions, 646 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:24,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:24,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2023-11-30 04:16:24,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:32,684 INFO L124 PetriNetUnfolderBase]: 51241/89137 cut-off events. [2023-11-30 04:16:32,684 INFO L125 PetriNetUnfolderBase]: For 16066/18150 co-relation queries the response was YES. [2023-11-30 04:16:32,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221258 conditions, 89137 events. 51241/89137 cut-off events. For 16066/18150 co-relation queries the response was YES. Maximal size of possible extension queue 7196. Compared 968234 event pairs, 35349 based on Foata normal form. 0/53199 useless extension candidates. Maximal degree in co-relation 16209. Up to 61830 conditions per place. [2023-11-30 04:16:33,569 INFO L140 encePairwiseOnDemand]: 140/142 looper letters, 105 selfloop transitions, 1 changer transitions 0/182 dead transitions. [2023-11-30 04:16:33,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 850 flow [2023-11-30 04:16:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:16:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:16:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-11-30 04:16:33,571 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6244131455399061 [2023-11-30 04:16:33,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-11-30 04:16:33,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-11-30 04:16:33,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:33,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-11-30 04:16:33,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:33,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:33,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:33,573 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, -9 predicate places. [2023-11-30 04:16:33,573 INFO L500 AbstractCegarLoop]: Abstraction has has 130 places, 182 transitions, 850 flow [2023-11-30 04:16:33,573 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:33,573 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:33,573 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] [2023-11-30 04:16:33,573 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-30 04:16:33,573 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:16:33,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:33,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1815058706, now seen corresponding path program 1 times [2023-11-30 04:16:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:33,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780475668] [2023-11-30 04:16:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:33,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:33,633 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 04:16:33,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:33,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780475668] [2023-11-30 04:16:33,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780475668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:33,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:33,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-30 04:16:33,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35658155] [2023-11-30 04:16:33,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:33,634 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-30 04:16:33,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:33,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-30 04:16:33,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-30 04:16:33,636 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-11-30 04:16:33,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 182 transitions, 850 flow. Second operand has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:33,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:33,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-11-30 04:16:33,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:41,872 INFO L124 PetriNetUnfolderBase]: 47827/91213 cut-off events. [2023-11-30 04:16:41,872 INFO L125 PetriNetUnfolderBase]: For 32849/37503 co-relation queries the response was YES. [2023-11-30 04:16:42,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290128 conditions, 91213 events. 47827/91213 cut-off events. For 32849/37503 co-relation queries the response was YES. Maximal size of possible extension queue 7840. Compared 1089692 event pairs, 18240 based on Foata normal form. 386/57243 useless extension candidates. Maximal degree in co-relation 26700. Up to 60959 conditions per place. [2023-11-30 04:16:42,793 INFO L140 encePairwiseOnDemand]: 103/142 looper letters, 204 selfloop transitions, 63 changer transitions 0/325 dead transitions. [2023-11-30 04:16:42,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 325 transitions, 2214 flow [2023-11-30 04:16:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:16:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:16:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 541 transitions. [2023-11-30 04:16:42,795 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6349765258215962 [2023-11-30 04:16:42,795 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 541 transitions. [2023-11-30 04:16:42,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 541 transitions. [2023-11-30 04:16:42,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:42,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 541 transitions. [2023-11-30 04:16:42,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:42,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:42,797 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:42,797 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, -4 predicate places. [2023-11-30 04:16:42,797 INFO L500 AbstractCegarLoop]: Abstraction has has 135 places, 325 transitions, 2214 flow [2023-11-30 04:16:42,798 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:42,798 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:42,798 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] [2023-11-30 04:16:42,798 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-30 04:16:42,798 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:16:42,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:42,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1815058707, now seen corresponding path program 1 times [2023-11-30 04:16:42,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:42,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416929612] [2023-11-30 04:16:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:42,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:42,896 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 04:16:42,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:42,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416929612] [2023-11-30 04:16:42,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416929612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:42,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:42,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:16:42,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323517212] [2023-11-30 04:16:42,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:42,899 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:16:42,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:42,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:16:42,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:16:42,900 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 142 [2023-11-30 04:16:42,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 325 transitions, 2214 flow. Second operand has 7 states, 7 states have (on average 58.714285714285715) internal successors, (411), 7 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:42,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:42,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 142 [2023-11-30 04:16:42,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:49,210 INFO L124 PetriNetUnfolderBase]: 30494/60408 cut-off events. [2023-11-30 04:16:49,210 INFO L125 PetriNetUnfolderBase]: For 39320/44690 co-relation queries the response was YES. [2023-11-30 04:16:49,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230169 conditions, 60408 events. 30494/60408 cut-off events. For 39320/44690 co-relation queries the response was YES. Maximal size of possible extension queue 5234. Compared 704685 event pairs, 9591 based on Foata normal form. 668/42929 useless extension candidates. Maximal degree in co-relation 23648. Up to 37497 conditions per place. [2023-11-30 04:16:49,827 INFO L140 encePairwiseOnDemand]: 103/142 looper letters, 165 selfloop transitions, 63 changer transitions 0/283 dead transitions. [2023-11-30 04:16:49,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 283 transitions, 2322 flow [2023-11-30 04:16:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:16:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:16:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 464 transitions. [2023-11-30 04:16:49,832 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5446009389671361 [2023-11-30 04:16:49,832 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 464 transitions. [2023-11-30 04:16:49,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 464 transitions. [2023-11-30 04:16:49,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:49,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 464 transitions. [2023-11-30 04:16:49,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.33333333333333) internal successors, (464), 6 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:49,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:49,835 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:49,836 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, -8 predicate places. [2023-11-30 04:16:49,836 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 283 transitions, 2322 flow [2023-11-30 04:16:49,836 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.714285714285715) internal successors, (411), 7 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:49,836 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:49,836 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] [2023-11-30 04:16:49,836 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-30 04:16:49,836 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:16:49,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1223742345, now seen corresponding path program 1 times [2023-11-30 04:16:49,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026411775] [2023-11-30 04:16:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:49,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:49,872 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 04:16:49,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:49,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026411775] [2023-11-30 04:16:49,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026411775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:49,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:49,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835631844] [2023-11-30 04:16:49,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:49,873 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:49,873 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 142 [2023-11-30 04:16:49,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 283 transitions, 2322 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:49,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:49,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 142 [2023-11-30 04:16:49,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:16:58,188 INFO L124 PetriNetUnfolderBase]: 40704/77771 cut-off events. [2023-11-30 04:16:58,188 INFO L125 PetriNetUnfolderBase]: For 83406/87228 co-relation queries the response was YES. [2023-11-30 04:16:58,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342518 conditions, 77771 events. 40704/77771 cut-off events. For 83406/87228 co-relation queries the response was YES. Maximal size of possible extension queue 6651. Compared 916415 event pairs, 4508 based on Foata normal form. 616/55752 useless extension candidates. Maximal degree in co-relation 114459. Up to 46010 conditions per place. [2023-11-30 04:16:59,059 INFO L140 encePairwiseOnDemand]: 130/142 looper letters, 351 selfloop transitions, 39 changer transitions 0/450 dead transitions. [2023-11-30 04:16:59,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 450 transitions, 4742 flow [2023-11-30 04:16:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:16:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:16:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-11-30 04:16:59,080 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6924882629107981 [2023-11-30 04:16:59,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-11-30 04:16:59,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-11-30 04:16:59,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:16:59,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-11-30 04:16:59,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:59,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:59,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:59,083 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, -6 predicate places. [2023-11-30 04:16:59,083 INFO L500 AbstractCegarLoop]: Abstraction has has 133 places, 450 transitions, 4742 flow [2023-11-30 04:16:59,083 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:59,083 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:16:59,083 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] [2023-11-30 04:16:59,084 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-30 04:16:59,084 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:16:59,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:16:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1223742342, now seen corresponding path program 1 times [2023-11-30 04:16:59,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:16:59,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205944689] [2023-11-30 04:16:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:16:59,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:16:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:16:59,135 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 04:16:59,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:16:59,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205944689] [2023-11-30 04:16:59,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205944689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:16:59,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:16:59,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:16:59,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500433164] [2023-11-30 04:16:59,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:16:59,135 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:16:59,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:16:59,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:16:59,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:16:59,136 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2023-11-30 04:16:59,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 450 transitions, 4742 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:16:59,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:16:59,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2023-11-30 04:16:59,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:17:06,675 INFO L124 PetriNetUnfolderBase]: 34882/67887 cut-off events. [2023-11-30 04:17:06,675 INFO L125 PetriNetUnfolderBase]: For 121814/126856 co-relation queries the response was YES. [2023-11-30 04:17:06,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331886 conditions, 67887 events. 34882/67887 cut-off events. For 121814/126856 co-relation queries the response was YES. Maximal size of possible extension queue 5589. Compared 796920 event pairs, 2135 based on Foata normal form. 1096/54389 useless extension candidates. Maximal degree in co-relation 109301. Up to 37679 conditions per place. [2023-11-30 04:17:07,373 INFO L140 encePairwiseOnDemand]: 136/142 looper letters, 403 selfloop transitions, 7 changer transitions 0/531 dead transitions. [2023-11-30 04:17:07,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 531 transitions, 6560 flow [2023-11-30 04:17:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:17:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:17:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-11-30 04:17:07,378 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.676056338028169 [2023-11-30 04:17:07,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-11-30 04:17:07,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-11-30 04:17:07,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:17:07,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-11-30 04:17:07,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:07,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:07,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:07,386 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, -7 predicate places. [2023-11-30 04:17:07,386 INFO L500 AbstractCegarLoop]: Abstraction has has 132 places, 531 transitions, 6560 flow [2023-11-30 04:17:07,386 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:07,386 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:17:07,386 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] [2023-11-30 04:17:07,386 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-30 04:17:07,386 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:17:07,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:17:07,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1679968815, now seen corresponding path program 1 times [2023-11-30 04:17:07,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:17:07,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737219417] [2023-11-30 04:17:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:17:07,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:17:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:17:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-30 04:17:07,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:17:07,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737219417] [2023-11-30 04:17:07,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737219417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:17:07,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:17:07,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 04:17:07,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917157521] [2023-11-30 04:17:07,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:17:07,493 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 04:17:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:17:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 04:17:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 04:17:07,493 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-11-30 04:17:07,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 531 transitions, 6560 flow. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:07,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:17:07,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-11-30 04:17:07,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:17:15,840 INFO L124 PetriNetUnfolderBase]: 32730/66188 cut-off events. [2023-11-30 04:17:15,840 INFO L125 PetriNetUnfolderBase]: For 160406/167911 co-relation queries the response was YES. [2023-11-30 04:17:16,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369991 conditions, 66188 events. 32730/66188 cut-off events. For 160406/167911 co-relation queries the response was YES. Maximal size of possible extension queue 5305. Compared 795178 event pairs, 1133 based on Foata normal form. 2078/54238 useless extension candidates. Maximal degree in co-relation 119235. Up to 36321 conditions per place. [2023-11-30 04:17:16,716 INFO L140 encePairwiseOnDemand]: 127/142 looper letters, 629 selfloop transitions, 80 changer transitions 0/772 dead transitions. [2023-11-30 04:17:16,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 772 transitions, 11173 flow [2023-11-30 04:17:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 04:17:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 04:17:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 383 transitions. [2023-11-30 04:17:16,718 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6742957746478874 [2023-11-30 04:17:16,718 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 383 transitions. [2023-11-30 04:17:16,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 383 transitions. [2023-11-30 04:17:16,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:17:16,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 383 transitions. [2023-11-30 04:17:16,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:16,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:16,720 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:16,720 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, -4 predicate places. [2023-11-30 04:17:16,720 INFO L500 AbstractCegarLoop]: Abstraction has has 135 places, 772 transitions, 11173 flow [2023-11-30 04:17:16,721 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:16,721 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:17:16,721 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:17:16,721 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-30 04:17:16,721 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:17:16,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:17:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1323855312, now seen corresponding path program 1 times [2023-11-30 04:17:16,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:17:16,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225689163] [2023-11-30 04:17:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:17:16,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:17:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:17:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-30 04:17:16,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:17:16,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225689163] [2023-11-30 04:17:16,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225689163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:17:16,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:17:16,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:17:16,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369907145] [2023-11-30 04:17:16,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:17:16,769 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:17:16,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:17:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:17:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:17:16,770 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2023-11-30 04:17:16,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 772 transitions, 11173 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:16,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:17:16,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2023-11-30 04:17:16,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:17:26,427 INFO L124 PetriNetUnfolderBase]: 36065/69912 cut-off events. [2023-11-30 04:17:26,427 INFO L125 PetriNetUnfolderBase]: For 261798/267408 co-relation queries the response was YES. [2023-11-30 04:17:26,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413711 conditions, 69912 events. 36065/69912 cut-off events. For 261798/267408 co-relation queries the response was YES. Maximal size of possible extension queue 5454. Compared 815226 event pairs, 881 based on Foata normal form. 1004/57672 useless extension candidates. Maximal degree in co-relation 340515. Up to 36280 conditions per place. [2023-11-30 04:17:27,323 INFO L140 encePairwiseOnDemand]: 136/142 looper letters, 891 selfloop transitions, 23 changer transitions 0/1053 dead transitions. [2023-11-30 04:17:27,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 1053 transitions, 17623 flow [2023-11-30 04:17:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:17:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:17:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-11-30 04:17:27,325 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6596244131455399 [2023-11-30 04:17:27,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-11-30 04:17:27,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-11-30 04:17:27,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:17:27,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-11-30 04:17:27,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:27,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:27,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:27,349 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, -5 predicate places. [2023-11-30 04:17:27,349 INFO L500 AbstractCegarLoop]: Abstraction has has 134 places, 1053 transitions, 17623 flow [2023-11-30 04:17:27,349 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:27,349 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:17:27,349 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:17:27,349 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-30 04:17:27,349 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:17:27,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:17:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1323855309, now seen corresponding path program 1 times [2023-11-30 04:17:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:17:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273986701] [2023-11-30 04:17:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:17:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:17:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:17:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-30 04:17:27,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:17:27,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273986701] [2023-11-30 04:17:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273986701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:17:27,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:17:27,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:17:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936235116] [2023-11-30 04:17:27,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:17:27,427 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:17:27,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:17:27,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:17:27,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:17:27,427 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 142 [2023-11-30 04:17:27,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 1053 transitions, 17623 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:27,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:17:27,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 142 [2023-11-30 04:17:27,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:17:40,412 INFO L124 PetriNetUnfolderBase]: 42041/81210 cut-off events. [2023-11-30 04:17:40,412 INFO L125 PetriNetUnfolderBase]: For 400285/411201 co-relation queries the response was YES. [2023-11-30 04:17:41,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524793 conditions, 81210 events. 42041/81210 cut-off events. For 400285/411201 co-relation queries the response was YES. Maximal size of possible extension queue 6211. Compared 955855 event pairs, 1454 based on Foata normal form. 824/66992 useless extension candidates. Maximal degree in co-relation 434237. Up to 44176 conditions per place. [2023-11-30 04:17:41,737 INFO L140 encePairwiseOnDemand]: 130/142 looper letters, 1172 selfloop transitions, 116 changer transitions 0/1356 dead transitions. [2023-11-30 04:17:41,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 1356 transitions, 25377 flow [2023-11-30 04:17:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:17:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:17:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2023-11-30 04:17:41,744 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-30 04:17:41,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2023-11-30 04:17:41,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2023-11-30 04:17:41,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:17:41,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2023-11-30 04:17:41,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:41,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:41,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:41,746 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, -3 predicate places. [2023-11-30 04:17:41,746 INFO L500 AbstractCegarLoop]: Abstraction has has 136 places, 1356 transitions, 25377 flow [2023-11-30 04:17:41,746 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:41,746 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:17:41,747 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:17:41,747 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-30 04:17:41,747 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:17:41,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:17:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash -598976296, now seen corresponding path program 1 times [2023-11-30 04:17:41,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:17:41,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81223164] [2023-11-30 04:17:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:17:41,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:17:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:17:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-30 04:17:41,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:17:41,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81223164] [2023-11-30 04:17:41,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81223164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:17:41,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723072174] [2023-11-30 04:17:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:17:41,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:17:41,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:17:41,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:17:41,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-30 04:17:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:17:41,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-30 04:17:41,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:17:42,064 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:17:42,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-30 04:17:42,122 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:17:42,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 04:17:42,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 04:17:42,180 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-30 04:17:42,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-30 04:17:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-30 04:17:42,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-30 04:17:42,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723072174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:17:42,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-30 04:17:42,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-11-30 04:17:42,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243335000] [2023-11-30 04:17:42,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:17:42,200 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-30 04:17:42,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:17:42,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-30 04:17:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-30 04:17:42,201 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2023-11-30 04:17:42,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 1356 transitions, 25377 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:17:42,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:17:42,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2023-11-30 04:17:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:18:00,085 INFO L124 PetriNetUnfolderBase]: 47866/93366 cut-off events. [2023-11-30 04:18:00,085 INFO L125 PetriNetUnfolderBase]: For 607890/630437 co-relation queries the response was YES. [2023-11-30 04:18:00,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655311 conditions, 93366 events. 47866/93366 cut-off events. For 607890/630437 co-relation queries the response was YES. Maximal size of possible extension queue 7096. Compared 1130020 event pairs, 1836 based on Foata normal form. 1594/79277 useless extension candidates. Maximal degree in co-relation 549973. Up to 52886 conditions per place. [2023-11-30 04:18:01,472 INFO L140 encePairwiseOnDemand]: 110/142 looper letters, 1924 selfloop transitions, 271 changer transitions 0/2257 dead transitions. [2023-11-30 04:18:01,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 2257 transitions, 47071 flow [2023-11-30 04:18:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:18:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:18:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 541 transitions. [2023-11-30 04:18:01,473 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6349765258215962 [2023-11-30 04:18:01,473 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 541 transitions. [2023-11-30 04:18:01,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 541 transitions. [2023-11-30 04:18:01,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:18:01,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 541 transitions. [2023-11-30 04:18:01,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:01,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:01,490 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:01,491 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-11-30 04:18:01,491 INFO L500 AbstractCegarLoop]: Abstraction has has 141 places, 2257 transitions, 47071 flow [2023-11-30 04:18:01,491 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:01,491 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:18:01,491 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:18:01,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-30 04:18:01,699 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-30 04:18:01,699 INFO L425 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:18:01,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:18:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2093763341, now seen corresponding path program 1 times [2023-11-30 04:18:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:18:01,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691499150] [2023-11-30 04:18:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:18:01,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:18:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:18:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-30 04:18:02,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:18:02,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691499150] [2023-11-30 04:18:02,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691499150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:18:02,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426289336] [2023-11-30 04:18:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:18:02,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:18:02,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:18:02,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:18:02,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-30 04:18:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:18:02,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-30 04:18:02,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:18:02,198 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:18:02,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-30 04:18:02,242 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-30 04:18:02,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-30 04:18:02,269 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:18:02,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-30 04:18:02,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-11-30 04:18:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-30 04:18:02,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-30 04:18:02,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426289336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:18:02,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-30 04:18:02,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-11-30 04:18:02,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604653296] [2023-11-30 04:18:02,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:18:02,315 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-30 04:18:02,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:18:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-30 04:18:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-30 04:18:02,315 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2023-11-30 04:18:02,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 2257 transitions, 47071 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:02,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:18:02,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2023-11-30 04:18:02,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:18:26,123 INFO L124 PetriNetUnfolderBase]: 46794/90807 cut-off events. [2023-11-30 04:18:26,123 INFO L125 PetriNetUnfolderBase]: For 663719/683360 co-relation queries the response was YES. [2023-11-30 04:18:26,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692342 conditions, 90807 events. 46794/90807 cut-off events. For 663719/683360 co-relation queries the response was YES. Maximal size of possible extension queue 6808. Compared 1083941 event pairs, 698 based on Foata normal form. 1299/78123 useless extension candidates. Maximal degree in co-relation 590912. Up to 49965 conditions per place. [2023-11-30 04:18:27,847 INFO L140 encePairwiseOnDemand]: 123/142 looper letters, 2680 selfloop transitions, 224 changer transitions 0/2980 dead transitions. [2023-11-30 04:18:27,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 2980 transitions, 67594 flow [2023-11-30 04:18:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 04:18:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 04:18:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 618 transitions. [2023-11-30 04:18:27,853 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6217303822937625 [2023-11-30 04:18:27,853 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 618 transitions. [2023-11-30 04:18:27,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 618 transitions. [2023-11-30 04:18:27,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:18:27,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 618 transitions. [2023-11-30 04:18:27,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:27,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:27,871 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:27,871 INFO L307 CegarLoopForPetriNet]: 139 programPoint places, 8 predicate places. [2023-11-30 04:18:27,871 INFO L500 AbstractCegarLoop]: Abstraction has has 147 places, 2980 transitions, 67594 flow [2023-11-30 04:18:27,871 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:27,871 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:18:27,871 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:18:27,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-30 04:18:28,075 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-30 04:18:28,076 INFO L425 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-11-30 04:18:28,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:18:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash 745693020, now seen corresponding path program 1 times [2023-11-30 04:18:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:18:28,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63658612] [2023-11-30 04:18:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:18:28,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:18:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 04:18:28,083 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 04:18:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 04:18:28,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 04:18:28,110 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (58 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 59 remaining) [2023-11-30 04:18:28,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 59 remaining) [2023-11-30 04:18:28,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 59 remaining) [2023-11-30 04:18:28,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 59 remaining) [2023-11-30 04:18:28,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 59 remaining) [2023-11-30 04:18:28,115 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 59 remaining) [2023-11-30 04:18:28,115 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 59 remaining) [2023-11-30 04:18:28,115 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 59 remaining) [2023-11-30 04:18:28,115 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-30 04:18:28,115 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:18:28,115 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 04:18:28,115 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-30 04:18:28,208 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-30 04:18:28,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 180 transitions, 388 flow [2023-11-30 04:18:28,225 INFO L124 PetriNetUnfolderBase]: 17/238 cut-off events. [2023-11-30 04:18:28,225 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-30 04:18:28,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 238 events. 17/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 951 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 193. Up to 10 conditions per place. [2023-11-30 04:18:28,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 180 transitions, 388 flow [2023-11-30 04:18:28,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 180 transitions, 388 flow [2023-11-30 04:18:28,237 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 04:18:28,237 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;@74bab840, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 04:18:28,237 INFO L363 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2023-11-30 04:18:28,238 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 04:18:28,238 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-30 04:18:28,238 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:18:28,238 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:18:28,238 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:18:28,238 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-30 04:18:28,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:18:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1802419013, now seen corresponding path program 1 times [2023-11-30 04:18:28,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:18:28,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245353282] [2023-11-30 04:18:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:18:28,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:18:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:18:28,266 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 04:18:28,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:18:28,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245353282] [2023-11-30 04:18:28,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245353282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:18:28,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:18:28,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:18:28,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724501639] [2023-11-30 04:18:28,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:18:28,267 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:18:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:18:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:18:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:18:28,267 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 180 [2023-11-30 04:18:28,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 180 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:18:28,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:18:28,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 180 [2023-11-30 04:18:28,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand