/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/bigshot_s2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 04:00:27,174 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 04:00:27,245 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-11-30 04:00:27,271 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 04:00:27,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 04:00:27,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 04:00:27,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 04:00:27,272 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 04:00:27,273 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 04:00:27,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 04:00:27,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 04:00:27,276 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 04:00:27,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 04:00:27,277 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 04:00:27,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 04:00:27,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 04:00:27,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 04:00:27,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 04:00:27,278 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 04:00:27,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 04:00:27,279 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 04:00:27,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 04:00:27,279 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 04:00:27,279 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 04:00:27,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 04:00:27,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 04:00:27,281 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 04:00:27,281 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 04:00:27,281 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 04:00:27,281 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 04:00:27,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 04:00:27,282 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 04:00:27,282 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 04:00:27,282 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 04:00:27,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 04:00:27,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 04:00:27,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 04:00:27,482 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 04:00:27,482 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 04:00:27,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s2.i [2023-11-30 04:00:28,537 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 04:00:28,724 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 04:00:28,725 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i [2023-11-30 04:00:28,736 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bcbec8cf/4e328ef7b62144e38fe7c1ad3af65e7b/FLAG6f10df03e [2023-11-30 04:00:28,745 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bcbec8cf/4e328ef7b62144e38fe7c1ad3af65e7b [2023-11-30 04:00:28,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 04:00:28,747 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 04:00:28,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 04:00:28,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 04:00:28,753 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 04:00:28,753 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 04:00:28" (1/1) ... [2023-11-30 04:00:28,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a24d4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:28, skipping insertion in model container [2023-11-30 04:00:28,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 04:00:28" (1/1) ... [2023-11-30 04:00:28,782 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 04:00:29,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 04:00:29,072 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 04:00:29,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 04:00:29,144 INFO L206 MainTranslator]: Completed translation [2023-11-30 04:00:29,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29 WrapperNode [2023-11-30 04:00:29,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 04:00:29,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 04:00:29,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 04:00:29,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 04:00:29,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,172 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,193 INFO L138 Inliner]: procedures = 323, calls = 34, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2023-11-30 04:00:29,193 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 04:00:29,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 04:00:29,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 04:00:29,194 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 04:00:29,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,209 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,215 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,217 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,218 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,218 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 04:00:29,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 04:00:29,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 04:00:29,221 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 04:00:29,221 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (1/1) ... [2023-11-30 04:00:29,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 04:00:29,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:00:29,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-30 04:00:29,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-30 04:00:29,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 04:00:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 04:00:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-30 04:00:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 04:00:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-30 04:00:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-30 04:00:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-30 04:00:29,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-30 04:00:29,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 04:00:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-30 04:00:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 04:00:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 04:00:29,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 04:00:29,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 04:00:29,297 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-30 04:00:29,393 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 04:00:29,394 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 04:00:29,596 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 04:00:29,604 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 04:00:29,605 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-30 04:00:29,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 04:00:29 BoogieIcfgContainer [2023-11-30 04:00:29,606 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 04:00:29,607 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 04:00:29,608 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 04:00:29,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 04:00:29,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 04:00:28" (1/3) ... [2023-11-30 04:00:29,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae7ce9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 04:00:29, skipping insertion in model container [2023-11-30 04:00:29,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:00:29" (2/3) ... [2023-11-30 04:00:29,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae7ce9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 04:00:29, skipping insertion in model container [2023-11-30 04:00:29,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 04:00:29" (3/3) ... [2023-11-30 04:00:29,612 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2023-11-30 04:00:29,623 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 04:00:29,623 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-30 04:00:29,623 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 04:00:29,703 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-30 04:00:29,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 110 transitions, 234 flow [2023-11-30 04:00:29,770 INFO L124 PetriNetUnfolderBase]: 5/108 cut-off events. [2023-11-30 04:00:29,771 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-30 04:00:29,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 5/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2023-11-30 04:00:29,775 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 110 transitions, 234 flow [2023-11-30 04:00:29,779 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 84 transitions, 180 flow [2023-11-30 04:00:29,793 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 04:00:29,804 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;@5d58e644, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 04:00:29,804 INFO L363 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-30 04:00:29,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 04:00:29,816 INFO L124 PetriNetUnfolderBase]: 0/23 cut-off events. [2023-11-30 04:00:29,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:00:29,817 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:29,817 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] [2023-11-30 04:00:29,817 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:29,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1347770577, now seen corresponding path program 1 times [2023-11-30 04:00:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:29,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59718120] [2023-11-30 04:00:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:29,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:30,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:30,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59718120] [2023-11-30 04:00:30,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59718120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:30,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:30,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:00:30,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526775117] [2023-11-30 04:00:30,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:30,154 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:00:30,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:30,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:00:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:00:30,173 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 110 [2023-11-30 04:00:30,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:30,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 110 [2023-11-30 04:00:30,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:30,223 INFO L124 PetriNetUnfolderBase]: 16/117 cut-off events. [2023-11-30 04:00:30,223 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-11-30 04:00:30,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 117 events. 16/117 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 240 event pairs, 14 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 109. Up to 50 conditions per place. [2023-11-30 04:00:30,225 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 26 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-11-30 04:00:30,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 81 transitions, 228 flow [2023-11-30 04:00:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:00:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:00:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-11-30 04:00:30,234 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7454545454545455 [2023-11-30 04:00:30,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-11-30 04:00:30,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-11-30 04:00:30,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:30,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-11-30 04:00:30,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,246 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 0 predicate places. [2023-11-30 04:00:30,246 INFO L500 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 228 flow [2023-11-30 04:00:30,246 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,246 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:30,246 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] [2023-11-30 04:00:30,246 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 04:00:30,247 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:30,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:30,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1347770578, now seen corresponding path program 1 times [2023-11-30 04:00:30,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:30,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566844844] [2023-11-30 04:00:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:30,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:30,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566844844] [2023-11-30 04:00:30,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566844844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:30,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:30,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 04:00:30,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341008930] [2023-11-30 04:00:30,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:30,357 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 04:00:30,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 04:00:30,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 04:00:30,360 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 110 [2023-11-30 04:00:30,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 228 flow. Second operand 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 04:00:30,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:30,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 110 [2023-11-30 04:00:30,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:30,462 INFO L124 PetriNetUnfolderBase]: 43/191 cut-off events. [2023-11-30 04:00:30,463 INFO L125 PetriNetUnfolderBase]: For 42/61 co-relation queries the response was YES. [2023-11-30 04:00:30,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 191 events. 43/191 cut-off events. For 42/61 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 653 event pairs, 34 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 309. Up to 103 conditions per place. [2023-11-30 04:00:30,468 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 32 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-11-30 04:00:30,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 286 flow [2023-11-30 04:00:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:00:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:00:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-11-30 04:00:30,474 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6878787878787879 [2023-11-30 04:00:30,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-11-30 04:00:30,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-11-30 04:00:30,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:30,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-11-30 04:00:30,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,483 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 0 predicate places. [2023-11-30 04:00:30,483 INFO L500 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 286 flow [2023-11-30 04:00:30,483 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has 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 04:00:30,483 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:30,484 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:30,484 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 04:00:30,484 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:30,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1461875325, now seen corresponding path program 1 times [2023-11-30 04:00:30,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:30,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300367633] [2023-11-30 04:00:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:30,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:30,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:30,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300367633] [2023-11-30 04:00:30,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300367633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:30,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:30,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 04:00:30,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925524192] [2023-11-30 04:00:30,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:30,677 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:00:30,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:30,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:00:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:00:30,680 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 110 [2023-11-30 04:00:30,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:30,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 110 [2023-11-30 04:00:30,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:30,737 INFO L124 PetriNetUnfolderBase]: 30/154 cut-off events. [2023-11-30 04:00:30,737 INFO L125 PetriNetUnfolderBase]: For 106/126 co-relation queries the response was YES. [2023-11-30 04:00:30,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 154 events. 30/154 cut-off events. For 106/126 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 420 event pairs, 23 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 277. Up to 77 conditions per place. [2023-11-30 04:00:30,742 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 24 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-11-30 04:00:30,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 77 transitions, 324 flow [2023-11-30 04:00:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:00:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:00:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-11-30 04:00:30,743 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7363636363636363 [2023-11-30 04:00:30,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-11-30 04:00:30,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-11-30 04:00:30,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:30,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-11-30 04:00:30,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,746 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 0 predicate places. [2023-11-30 04:00:30,747 INFO L500 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 324 flow [2023-11-30 04:00:30,747 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,747 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:30,747 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:30,747 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-30 04:00:30,748 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:30,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1461875326, now seen corresponding path program 1 times [2023-11-30 04:00:30,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:30,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627901821] [2023-11-30 04:00:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:30,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:30,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:30,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627901821] [2023-11-30 04:00:30,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627901821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:30,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:30,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-30 04:00:30,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470449311] [2023-11-30 04:00:30,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:30,908 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-30 04:00:30,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-30 04:00:30,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-30 04:00:30,912 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 110 [2023-11-30 04:00:30,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:30,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 110 [2023-11-30 04:00:30,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:30,989 INFO L124 PetriNetUnfolderBase]: 19/119 cut-off events. [2023-11-30 04:00:30,989 INFO L125 PetriNetUnfolderBase]: For 166/179 co-relation queries the response was YES. [2023-11-30 04:00:30,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 119 events. 19/119 cut-off events. For 166/179 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 221 event pairs, 12 based on Foata normal form. 13/117 useless extension candidates. Maximal degree in co-relation 227. Up to 53 conditions per place. [2023-11-30 04:00:30,991 INFO L140 encePairwiseOnDemand]: 105/110 looper letters, 29 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-11-30 04:00:30,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 76 transitions, 384 flow [2023-11-30 04:00:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 04:00:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 04:00:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2023-11-30 04:00:30,992 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6409090909090909 [2023-11-30 04:00:30,992 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 282 transitions. [2023-11-30 04:00:30,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 282 transitions. [2023-11-30 04:00:30,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:30,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 282 transitions. [2023-11-30 04:00:30,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,994 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,995 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2023-11-30 04:00:30,996 INFO L500 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 384 flow [2023-11-30 04:00:30,996 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:30,996 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:30,996 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:30,996 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 04:00:30,996 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:30,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1329627331, now seen corresponding path program 1 times [2023-11-30 04:00:30,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:30,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555152193] [2023-11-30 04:00:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:31,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555152193] [2023-11-30 04:00:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555152193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:31,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:31,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:00:31,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061636021] [2023-11-30 04:00:31,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:31,220 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:00:31,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:31,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:00:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:00:31,221 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 110 [2023-11-30 04:00:31,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 76 transitions, 384 flow. Second operand has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 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 04:00:31,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:31,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 110 [2023-11-30 04:00:31,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:31,280 INFO L124 PetriNetUnfolderBase]: 18/117 cut-off events. [2023-11-30 04:00:31,280 INFO L125 PetriNetUnfolderBase]: For 253/262 co-relation queries the response was YES. [2023-11-30 04:00:31,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 117 events. 18/117 cut-off events. For 253/262 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 207 event pairs, 2 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 236. Up to 47 conditions per place. [2023-11-30 04:00:31,282 INFO L140 encePairwiseOnDemand]: 104/110 looper letters, 24 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-30 04:00:31,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 430 flow [2023-11-30 04:00:31,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-30 04:00:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-30 04:00:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2023-11-30 04:00:31,283 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6345454545454545 [2023-11-30 04:00:31,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2023-11-30 04:00:31,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2023-11-30 04:00:31,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:31,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2023-11-30 04:00:31,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,285 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,287 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-11-30 04:00:31,287 INFO L500 AbstractCegarLoop]: Abstraction has has 91 places, 75 transitions, 430 flow [2023-11-30 04:00:31,288 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 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 04:00:31,288 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:31,288 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:31,288 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-30 04:00:31,288 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:31,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1731225409, now seen corresponding path program 1 times [2023-11-30 04:00:31,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:31,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767922734] [2023-11-30 04:00:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:31,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:31,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:31,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767922734] [2023-11-30 04:00:31,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767922734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:31,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:31,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-30 04:00:31,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89534150] [2023-11-30 04:00:31,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:31,573 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-30 04:00:31,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:31,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-30 04:00:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-30 04:00:31,574 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 110 [2023-11-30 04:00:31,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 75 transitions, 430 flow. Second operand has 9 states, 9 states have (on average 58.111111111111114) internal successors, (523), 9 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:31,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 110 [2023-11-30 04:00:31,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:31,698 INFO L124 PetriNetUnfolderBase]: 33/158 cut-off events. [2023-11-30 04:00:31,698 INFO L125 PetriNetUnfolderBase]: For 470/481 co-relation queries the response was YES. [2023-11-30 04:00:31,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 158 events. 33/158 cut-off events. For 470/481 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 414 event pairs, 2 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 479. Up to 74 conditions per place. [2023-11-30 04:00:31,701 INFO L140 encePairwiseOnDemand]: 100/110 looper letters, 39 selfloop transitions, 8 changer transitions 0/86 dead transitions. [2023-11-30 04:00:31,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 86 transitions, 610 flow [2023-11-30 04:00:31,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 04:00:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 04:00:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 440 transitions. [2023-11-30 04:00:31,703 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-30 04:00:31,703 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 440 transitions. [2023-11-30 04:00:31,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 440 transitions. [2023-11-30 04:00:31,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:31,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 440 transitions. [2023-11-30 04:00:31,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 110.0) internal successors, (880), 8 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,705 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 110.0) internal successors, (880), 8 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,707 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 9 predicate places. [2023-11-30 04:00:31,708 INFO L500 AbstractCegarLoop]: Abstraction has has 97 places, 86 transitions, 610 flow [2023-11-30 04:00:31,708 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.111111111111114) internal successors, (523), 9 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,708 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:31,708 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:31,708 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-30 04:00:31,708 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:31,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2128379834, now seen corresponding path program 1 times [2023-11-30 04:00:31,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:31,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082888475] [2023-11-30 04:00:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:31,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:31,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:31,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082888475] [2023-11-30 04:00:31,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082888475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:31,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:31,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-30 04:00:31,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622583489] [2023-11-30 04:00:31,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:31,788 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-30 04:00:31,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:31,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-30 04:00:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-30 04:00:31,790 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 110 [2023-11-30 04:00:31,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 610 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:31,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 110 [2023-11-30 04:00:31,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:31,856 INFO L124 PetriNetUnfolderBase]: 35/156 cut-off events. [2023-11-30 04:00:31,857 INFO L125 PetriNetUnfolderBase]: For 645/645 co-relation queries the response was YES. [2023-11-30 04:00:31,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 156 events. 35/156 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 388 event pairs, 3 based on Foata normal form. 1/145 useless extension candidates. Maximal degree in co-relation 519. Up to 70 conditions per place. [2023-11-30 04:00:31,858 INFO L140 encePairwiseOnDemand]: 103/110 looper letters, 36 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2023-11-30 04:00:31,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 85 transitions, 678 flow [2023-11-30 04:00:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:00:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:00:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2023-11-30 04:00:31,859 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2023-11-30 04:00:31,859 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2023-11-30 04:00:31,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2023-11-30 04:00:31,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:31,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2023-11-30 04:00:31,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,862 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,862 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-11-30 04:00:31,863 INFO L500 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 678 flow [2023-11-30 04:00:31,863 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,863 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:31,863 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:31,863 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-30 04:00:31,863 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:31,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1766959994, now seen corresponding path program 1 times [2023-11-30 04:00:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:31,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019589779] [2023-11-30 04:00:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:31,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:31,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019589779] [2023-11-30 04:00:31,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019589779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:31,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:31,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-30 04:00:31,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822285537] [2023-11-30 04:00:31,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:31,916 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 04:00:31,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 04:00:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-30 04:00:31,917 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 110 [2023-11-30 04:00:31,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 678 flow. Second operand has 4 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:31,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 110 [2023-11-30 04:00:31,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:31,954 INFO L124 PetriNetUnfolderBase]: 32/153 cut-off events. [2023-11-30 04:00:31,954 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-11-30 04:00:31,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 153 events. 32/153 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 380 event pairs, 2 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 514. Up to 69 conditions per place. [2023-11-30 04:00:31,955 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 8 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-11-30 04:00:31,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 84 transitions, 696 flow [2023-11-30 04:00:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-30 04:00:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-30 04:00:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2023-11-30 04:00:31,957 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8581818181818182 [2023-11-30 04:00:31,957 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2023-11-30 04:00:31,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2023-11-30 04:00:31,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:31,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2023-11-30 04:00:31,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,960 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,961 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 16 predicate places. [2023-11-30 04:00:31,962 INFO L500 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 696 flow [2023-11-30 04:00:31,962 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:31,962 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:31,962 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:31,962 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-30 04:00:31,962 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:31,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:31,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1555265118, now seen corresponding path program 1 times [2023-11-30 04:00:31,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:31,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524314680] [2023-11-30 04:00:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:31,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:32,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:32,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524314680] [2023-11-30 04:00:32,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524314680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:00:32,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:00:32,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-30 04:00:32,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004556573] [2023-11-30 04:00:32,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:00:32,086 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-30 04:00:32,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-30 04:00:32,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-30 04:00:32,087 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 110 [2023-11-30 04:00:32,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 696 flow. Second operand has 6 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:32,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:32,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 110 [2023-11-30 04:00:32,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:32,220 INFO L124 PetriNetUnfolderBase]: 31/149 cut-off events. [2023-11-30 04:00:32,220 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2023-11-30 04:00:32,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 149 events. 31/149 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 359 event pairs, 2 based on Foata normal form. 1/142 useless extension candidates. Maximal degree in co-relation 566. Up to 65 conditions per place. [2023-11-30 04:00:32,223 INFO L140 encePairwiseOnDemand]: 100/110 looper letters, 34 selfloop transitions, 6 changer transitions 11/83 dead transitions. [2023-11-30 04:00:32,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 83 transitions, 770 flow [2023-11-30 04:00:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 04:00:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 04:00:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2023-11-30 04:00:32,225 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6441558441558441 [2023-11-30 04:00:32,225 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2023-11-30 04:00:32,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2023-11-30 04:00:32,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:32,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2023-11-30 04:00:32,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:32,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 110.0) internal successors, (880), 8 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:32,227 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 110.0) internal successors, (880), 8 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:32,227 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 21 predicate places. [2023-11-30 04:00:32,228 INFO L500 AbstractCegarLoop]: Abstraction has has 109 places, 83 transitions, 770 flow [2023-11-30 04:00:32,228 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:32,228 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:32,228 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:32,228 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-30 04:00:32,228 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:32,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:32,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1218053878, now seen corresponding path program 1 times [2023-11-30 04:00:32,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:32,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810400182] [2023-11-30 04:00:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:32,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:32,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810400182] [2023-11-30 04:00:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810400182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:00:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356021901] [2023-11-30 04:00:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:32,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:00:32,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:00:32,520 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 04:00:32,576 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 04:00:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:32,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-30 04:00:32,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:00:32,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 04:00:32,749 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 04:00:32,764 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:00:32,765 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 04:00:32,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 04:00:32,785 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 04:00:32,796 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:00:32,797 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 04:00:32,832 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:00:32,832 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 14 treesize of output 13 [2023-11-30 04:00:32,846 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:00:32,847 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 04:00:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:33,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 04:00:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:33,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356021901] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 04:00:33,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 04:00:33,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 22 [2023-11-30 04:00:33,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119621479] [2023-11-30 04:00:33,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 04:00:33,365 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-30 04:00:33,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-30 04:00:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-11-30 04:00:33,367 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 110 [2023-11-30 04:00:33,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 83 transitions, 770 flow. Second operand has 23 states, 23 states have (on average 54.65217391304348) internal successors, (1257), 23 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:33,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:33,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 110 [2023-11-30 04:00:33,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:33,684 INFO L124 PetriNetUnfolderBase]: 54/222 cut-off events. [2023-11-30 04:00:33,684 INFO L125 PetriNetUnfolderBase]: For 1162/1162 co-relation queries the response was YES. [2023-11-30 04:00:33,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1353 conditions, 222 events. 54/222 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 592 event pairs, 2 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 1126. Up to 110 conditions per place. [2023-11-30 04:00:33,686 INFO L140 encePairwiseOnDemand]: 96/110 looper letters, 51 selfloop transitions, 13 changer transitions 13/105 dead transitions. [2023-11-30 04:00:33,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 105 transitions, 1196 flow [2023-11-30 04:00:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-30 04:00:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-30 04:00:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 686 transitions. [2023-11-30 04:00:33,687 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5196969696969697 [2023-11-30 04:00:33,687 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 686 transitions. [2023-11-30 04:00:33,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 686 transitions. [2023-11-30 04:00:33,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:33,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 686 transitions. [2023-11-30 04:00:33,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.166666666666664) internal successors, (686), 12 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:33,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 110.0) internal successors, (1430), 13 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:33,691 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 110.0) internal successors, (1430), 13 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:33,691 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 31 predicate places. [2023-11-30 04:00:33,691 INFO L500 AbstractCegarLoop]: Abstraction has has 119 places, 105 transitions, 1196 flow [2023-11-30 04:00:33,692 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.65217391304348) internal successors, (1257), 23 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:33,692 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:33,692 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:33,712 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 04:00:33,896 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,SelfDestructingSolverStorable9 [2023-11-30 04:00:33,897 INFO L425 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:33,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1976304429, now seen corresponding path program 1 times [2023-11-30 04:00:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:33,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581376475] [2023-11-30 04:00:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:33,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:34,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:34,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581376475] [2023-11-30 04:00:34,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581376475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:00:34,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228686875] [2023-11-30 04:00:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:34,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:00:34,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:00:34,050 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 04:00:34,090 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 04:00:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:34,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-30 04:00:34,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:00:34,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-30 04:00:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:34,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 04:00:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:34,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228686875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 04:00:34,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 04:00:34,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-30 04:00:34,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781254524] [2023-11-30 04:00:34,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 04:00:34,413 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-30 04:00:34,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:34,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-30 04:00:34,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-30 04:00:34,414 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 110 [2023-11-30 04:00:34,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 105 transitions, 1196 flow. Second operand has 17 states, 17 states have (on average 67.88235294117646) internal successors, (1154), 17 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:34,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:34,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 110 [2023-11-30 04:00:34,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:34,675 INFO L124 PetriNetUnfolderBase]: 54/222 cut-off events. [2023-11-30 04:00:34,676 INFO L125 PetriNetUnfolderBase]: For 1350/1350 co-relation queries the response was YES. [2023-11-30 04:00:34,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 222 events. 54/222 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 566 event pairs, 2 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 1263. Up to 110 conditions per place. [2023-11-30 04:00:34,677 INFO L140 encePairwiseOnDemand]: 100/110 looper letters, 48 selfloop transitions, 10 changer transitions 15/108 dead transitions. [2023-11-30 04:00:34,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 108 transitions, 1370 flow [2023-11-30 04:00:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-30 04:00:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-30 04:00:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 710 transitions. [2023-11-30 04:00:34,679 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2023-11-30 04:00:34,680 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 710 transitions. [2023-11-30 04:00:34,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 710 transitions. [2023-11-30 04:00:34,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:34,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 710 transitions. [2023-11-30 04:00:34,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 71.0) internal successors, (710), 10 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 04:00:34,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 110.0) internal successors, (1210), 11 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:34,683 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 110.0) internal successors, (1210), 11 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:34,683 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 40 predicate places. [2023-11-30 04:00:34,683 INFO L500 AbstractCegarLoop]: Abstraction has has 128 places, 108 transitions, 1370 flow [2023-11-30 04:00:34,684 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.88235294117646) internal successors, (1154), 17 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:34,684 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:34,684 INFO L232 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:34,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-30 04:00:34,889 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,SelfDestructingSolverStorable10 [2023-11-30 04:00:34,889 INFO L425 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:34,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1797244949, now seen corresponding path program 2 times [2023-11-30 04:00:34,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:34,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733156766] [2023-11-30 04:00:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:34,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:35,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:35,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733156766] [2023-11-30 04:00:35,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733156766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:00:35,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944904341] [2023-11-30 04:00:35,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-30 04:00:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:00:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:00:35,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:00:35,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-30 04:00:35,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-30 04:00:35,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-30 04:00:35,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-30 04:00:35,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:00:35,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 04:00:35,394 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 04:00:35,406 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:00:35,406 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 04:00:35,426 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:00:35,427 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 04:00:35,430 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 04:00:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 04:00:35,455 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 04:00:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:35,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 04:00:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:36,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944904341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 04:00:36,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 04:00:36,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 31 [2023-11-30 04:00:36,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795481695] [2023-11-30 04:00:36,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 04:00:36,462 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-30 04:00:36,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:36,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-30 04:00:36,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2023-11-30 04:00:36,465 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 110 [2023-11-30 04:00:36,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 108 transitions, 1370 flow. Second operand has 32 states, 32 states have (on average 57.4375) internal successors, (1838), 32 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:36,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:36,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 110 [2023-11-30 04:00:36,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:36,958 INFO L124 PetriNetUnfolderBase]: 95/353 cut-off events. [2023-11-30 04:00:36,959 INFO L125 PetriNetUnfolderBase]: For 2273/2273 co-relation queries the response was YES. [2023-11-30 04:00:36,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 353 events. 95/353 cut-off events. For 2273/2273 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1014 event pairs, 2 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 2426. Up to 200 conditions per place. [2023-11-30 04:00:36,961 INFO L140 encePairwiseOnDemand]: 100/110 looper letters, 90 selfloop transitions, 14 changer transitions 19/152 dead transitions. [2023-11-30 04:00:36,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 152 transitions, 2354 flow [2023-11-30 04:00:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-30 04:00:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-30 04:00:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 849 transitions. [2023-11-30 04:00:36,963 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5512987012987013 [2023-11-30 04:00:36,963 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 849 transitions. [2023-11-30 04:00:36,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 849 transitions. [2023-11-30 04:00:36,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:36,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 849 transitions. [2023-11-30 04:00:36,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 60.642857142857146) internal successors, (849), 14 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:36,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 110.0) internal successors, (1650), 15 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:36,967 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 110.0) internal successors, (1650), 15 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:36,968 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 53 predicate places. [2023-11-30 04:00:36,968 INFO L500 AbstractCegarLoop]: Abstraction has has 141 places, 152 transitions, 2354 flow [2023-11-30 04:00:36,969 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 57.4375) internal successors, (1838), 32 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:36,969 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:36,969 INFO L232 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:36,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-30 04:00:37,174 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:00:37,176 INFO L425 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:37,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash -575533618, now seen corresponding path program 2 times [2023-11-30 04:00:37,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:37,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189241255] [2023-11-30 04:00:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:37,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:37,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189241255] [2023-11-30 04:00:37,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189241255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:00:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097553595] [2023-11-30 04:00:37,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-30 04:00:37,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:00:37,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:00:37,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:00:37,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-30 04:00:37,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-30 04:00:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-30 04:00:37,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-30 04:00:37,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:00:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 04:00:37,519 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 04:00:37,531 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:00:37,531 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 04:00:37,547 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:00:37,547 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 14 treesize of output 13 [2023-11-30 04:00:37,558 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:00:37,558 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 14 treesize of output 13 [2023-11-30 04:00:37,725 INFO L349 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2023-11-30 04:00:37,726 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 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-30 04:00:37,735 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:00:37,736 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 30 treesize of output 30 [2023-11-30 04:00:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-30 04:00:38,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 04:00:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-30 04:00:43,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097553595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 04:00:43,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 04:00:43,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 22 [2023-11-30 04:00:43,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901723012] [2023-11-30 04:00:43,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 04:00:43,796 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-30 04:00:43,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:43,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-30 04:00:43,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=433, Unknown=2, NotChecked=0, Total=506 [2023-11-30 04:00:43,798 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 110 [2023-11-30 04:00:43,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 152 transitions, 2354 flow. Second operand has 23 states, 23 states have (on average 57.65217391304348) internal successors, (1326), 23 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:43,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:43,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 110 [2023-11-30 04:00:43,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:45,270 INFO L124 PetriNetUnfolderBase]: 91/341 cut-off events. [2023-11-30 04:00:45,270 INFO L125 PetriNetUnfolderBase]: For 2575/2575 co-relation queries the response was YES. [2023-11-30 04:00:45,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 341 events. 91/341 cut-off events. For 2575/2575 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 914 event pairs, 2 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 2542. Up to 188 conditions per place. [2023-11-30 04:00:45,273 INFO L140 encePairwiseOnDemand]: 98/110 looper letters, 81 selfloop transitions, 24 changer transitions 21/154 dead transitions. [2023-11-30 04:00:45,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 154 transitions, 2636 flow [2023-11-30 04:00:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-30 04:00:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-30 04:00:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2023-11-30 04:00:45,276 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5268181818181819 [2023-11-30 04:00:45,276 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2023-11-30 04:00:45,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2023-11-30 04:00:45,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:45,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2023-11-30 04:00:45,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:45,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 110.0) internal successors, (2310), 21 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:45,281 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 110.0) internal successors, (2310), 21 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:45,282 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 71 predicate places. [2023-11-30 04:00:45,282 INFO L500 AbstractCegarLoop]: Abstraction has has 159 places, 154 transitions, 2636 flow [2023-11-30 04:00:45,282 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.65217391304348) internal successors, (1326), 23 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:45,282 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:00:45,282 INFO L232 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:45,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-30 04:00:45,487 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:00:45,488 INFO L425 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-30 04:00:45,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:00:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash -272029929, now seen corresponding path program 3 times [2023-11-30 04:00:45,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:00:45,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758596456] [2023-11-30 04:00:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:00:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:00:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:00:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 23 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:46,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:00:46,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758596456] [2023-11-30 04:00:46,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758596456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:00:46,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902108142] [2023-11-30 04:00:46,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-30 04:00:46,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:00:46,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:00:46,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:00:46,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-30 04:00:46,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-30 04:00:46,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-30 04:00:46,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-30 04:00:46,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:00:46,602 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:00:46,602 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 14 treesize of output 13 [2023-11-30 04:00:46,622 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:00:46,622 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 04:00:46,670 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:00:46,670 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 14 treesize of output 13 [2023-11-30 04:00:46,690 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:00:46,691 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 04:00:46,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-30 04:00:46,851 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:00:46,852 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 04:00:46,857 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 04:00:46,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-30 04:00:47,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-30 04:00:47,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-30 04:00:47,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-30 04:00:47,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-30 04:00:47,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-30 04:00:47,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-30 04:00:47,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-11-30 04:00:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 23 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:47,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 04:00:49,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-11-30 04:00:49,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2023-11-30 04:00:49,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2023-11-30 04:00:49,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-11-30 04:00:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:00:49,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902108142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 04:00:49,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 04:00:49,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 23] total 62 [2023-11-30 04:00:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180904537] [2023-11-30 04:00:49,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 04:00:49,918 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-30 04:00:49,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:00:49,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-30 04:00:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3419, Unknown=23, NotChecked=0, Total=3782 [2023-11-30 04:00:49,922 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 110 [2023-11-30 04:00:49,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 154 transitions, 2636 flow. Second operand has 62 states, 62 states have (on average 41.5) internal successors, (2573), 62 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:49,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:00:49,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 110 [2023-11-30 04:00:49,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:00:51,554 INFO L124 PetriNetUnfolderBase]: 101/343 cut-off events. [2023-11-30 04:00:51,554 INFO L125 PetriNetUnfolderBase]: For 3866/3866 co-relation queries the response was YES. [2023-11-30 04:00:51,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3214 conditions, 343 events. 101/343 cut-off events. For 3866/3866 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 990 event pairs, 2 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 2890. Up to 190 conditions per place. [2023-11-30 04:00:51,556 INFO L140 encePairwiseOnDemand]: 95/110 looper letters, 0 selfloop transitions, 0 changer transitions 166/166 dead transitions. [2023-11-30 04:00:51,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 166 transitions, 2924 flow [2023-11-30 04:00:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-30 04:00:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-30 04:00:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 875 transitions. [2023-11-30 04:00:51,566 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2023-11-30 04:00:51,566 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 875 transitions. [2023-11-30 04:00:51,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 875 transitions. [2023-11-30 04:00:51,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:00:51,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 875 transitions. [2023-11-30 04:00:51,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 43.75) internal successors, (875), 20 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:51,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 110.0) internal successors, (2310), 21 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:51,570 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 110.0) internal successors, (2310), 21 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:51,570 INFO L307 CegarLoopForPetriNet]: 88 programPoint places, 89 predicate places. [2023-11-30 04:00:51,570 INFO L500 AbstractCegarLoop]: Abstraction has has 177 places, 166 transitions, 2924 flow [2023-11-30 04:00:51,571 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 41.5) internal successors, (2573), 62 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:00:51,575 INFO L143 wickiGriesTestDumper]: Dumping Owicki-Gries test to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/bigshot_s2.i_BEv2_AllErrorsAtOnce [2023-11-30 04:00:51,626 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (23 of 24 remaining) [2023-11-30 04:00:51,626 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2023-11-30 04:00:51,626 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2023-11-30 04:00:51,626 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2023-11-30 04:00:51,626 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2023-11-30 04:00:51,626 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 24 remaining) [2023-11-30 04:00:51,627 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2023-11-30 04:00:51,628 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2023-11-30 04:00:51,628 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 24 remaining) [2023-11-30 04:00:51,628 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 24 remaining) [2023-11-30 04:00:51,628 INFO L810 garLoopResultBuilder]: Registering result SAFE for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 24 remaining) [2023-11-30 04:00:51,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-30 04:00:51,838 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-30 04:00:51,839 INFO L457 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:00:51,844 INFO L222 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-30 04:00:51,844 INFO L172 ceAbstractionStarter]: Computing trace abstraction results [2023-11-30 04:00:51,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 04:00:51 BasicIcfg [2023-11-30 04:00:51,849 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-30 04:00:51,851 INFO L158 Benchmark]: Toolchain (without parser) took 23102.89ms. Allocated memory was 341.8MB in the beginning and 885.0MB in the end (delta: 543.2MB). Free memory was 289.9MB in the beginning and 333.3MB in the end (delta: -43.4MB). Peak memory consumption was 498.7MB. Max. memory is 16.0GB. [2023-11-30 04:00:51,851 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory is still 292.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-11-30 04:00:51,851 INFO L158 Benchmark]: CACSL2BoogieTranslator took 396.62ms. Allocated memory is still 341.8MB. Free memory was 289.5MB in the beginning and 257.1MB in the end (delta: 32.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. [2023-11-30 04:00:51,851 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.40ms. Allocated memory is still 341.8MB. Free memory was 257.1MB in the beginning and 254.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-11-30 04:00:51,851 INFO L158 Benchmark]: Boogie Preprocessor took 26.22ms. Allocated memory is still 341.8MB. Free memory was 254.6MB in the beginning and 253.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-11-30 04:00:51,851 INFO L158 Benchmark]: RCFGBuilder took 385.13ms. Allocated memory is still 341.8MB. Free memory was 253.0MB in the beginning and 236.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-11-30 04:00:51,852 INFO L158 Benchmark]: TraceAbstraction took 22242.47ms. Allocated memory was 341.8MB in the beginning and 885.0MB in the end (delta: 543.2MB). Free memory was 235.4MB in the beginning and 333.3MB in the end (delta: -97.9MB). Peak memory consumption was 444.2MB. Max. memory is 16.0GB. [2023-11-30 04:00:51,852 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory is still 292.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 396.62ms. Allocated memory is still 341.8MB. Free memory was 289.5MB in the beginning and 257.1MB in the end (delta: 32.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.40ms. Allocated memory is still 341.8MB. Free memory was 257.1MB in the beginning and 254.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.22ms. Allocated memory is still 341.8MB. Free memory was 254.6MB in the beginning and 253.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 385.13ms. Allocated memory is still 341.8MB. Free memory was 253.0MB in the beginning and 236.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 22242.47ms. Allocated memory was 341.8MB in the beginning and 885.0MB in the end (delta: 543.2MB). Free memory was 235.4MB in the beginning and 333.3MB in the end (delta: -97.9MB). Peak memory consumption was 444.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 143 locations, 24 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 22.1s, OverallIterations: 14, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2671 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2671 mSDsluCounter, 762 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 587 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4733 IncrementalHoareTripleChecker+Invalid, 4868 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 175 mSDtfsCounter, 4733 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 947 GetRequests, 700 SyntacticMatches, 2 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2924occurred in iteration=14, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 14.8s InterpolantComputationTime, 1127 NumberOfCodeBlocks, 1095 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1486 ConstructedInterpolants, 219 QuantifiedInterpolants, 21424 SizeOfPredicates, 42 NumberOfNonLiveVariables, 1142 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 24 InterpolantComputations, 9 PerfectInterpolantSequences, 158/1098 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 16 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-30 04:00:51,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...