/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:17:00,087 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:17:00,155 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 [2023-12-05 21:17:00,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:17:00,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:17:00,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:17:00,182 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:17:00,182 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:17:00,182 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:17:00,185 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:17:00,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:17:00,186 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:17:00,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:17:00,187 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:17:00,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:17:00,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:17:00,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:17:00,188 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:17:00,188 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:17:00,188 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:17:00,188 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:17:00,189 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:17:00,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:17:00,189 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:17:00,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:17:00,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:00,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:17:00,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:17:00,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:17:00,190 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:17:00,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:17:00,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:17:00,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:17:00,191 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:17:00,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:17:00,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:17:00,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:17:00,357 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:17:00,357 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:17:00,358 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-12-05 21:17:01,505 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:17:01,734 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:17:01,735 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-12-05 21:17:01,757 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc37bfdb2/a82d4ad3ab5d401490bdded722f4f0a0/FLAGe0eb4a64b [2023-12-05 21:17:01,775 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc37bfdb2/a82d4ad3ab5d401490bdded722f4f0a0 [2023-12-05 21:17:01,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:17:01,780 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:17:01,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:01,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:17:01,784 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:17:01,784 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:01" (1/1) ... [2023-12-05 21:17:01,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283f6d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:01, skipping insertion in model container [2023-12-05 21:17:01,786 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:01" (1/1) ... [2023-12-05 21:17:01,819 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:17:02,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:02,171 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:17:02,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:02,253 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:17:02,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02 WrapperNode [2023-12-05 21:17:02,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:02,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:02,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:17:02,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:17:02,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,285 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,315 INFO L138 Inliner]: procedures = 272, calls = 36, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 227 [2023-12-05 21:17:02,315 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:02,316 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:17:02,316 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:17:02,316 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:17:02,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,337 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,337 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,342 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:17:02,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:17:02,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:17:02,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:17:02,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (1/1) ... [2023-12-05 21:17:02,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:02,383 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) [2023-12-05 21:17:02,405 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 [2023-12-05 21:17:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:17:02,421 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:17:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:17:02,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:17:02,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:17:02,423 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:17:02,522 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:17:02,523 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:17:02,856 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:17:02,890 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:17:02,890 INFO L309 CfgBuilder]: Removed 25 assume(true) statements. [2023-12-05 21:17:02,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:02 BoogieIcfgContainer [2023-12-05 21:17:02,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:17:02,893 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:17:02,893 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:17:02,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:17:02,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:17:01" (1/3) ... [2023-12-05 21:17:02,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166b6c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:02, skipping insertion in model container [2023-12-05 21:17:02,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:02" (2/3) ... [2023-12-05 21:17:02,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166b6c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:02, skipping insertion in model container [2023-12-05 21:17:02,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:02" (3/3) ... [2023-12-05 21:17:02,897 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-12-05 21:17:02,909 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:17:02,910 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-12-05 21:17:02,910 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:17:02,958 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-05 21:17:02,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 241 transitions, 489 flow [2023-12-05 21:17:03,103 INFO L124 PetriNetUnfolderBase]: 52/350 cut-off events. [2023-12-05 21:17:03,103 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-05 21:17:03,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 350 events. 52/350 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1524 event pairs, 0 based on Foata normal form. 0/257 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-12-05 21:17:03,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 241 transitions, 489 flow [2023-12-05 21:17:03,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 241 transitions, 489 flow [2023-12-05 21:17:03,140 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:03,144 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;@39a1aded, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:03,144 INFO L363 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-12-05 21:17:03,149 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:03,149 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2023-12-05 21:17:03,149 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:03,150 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:03,150 INFO L233 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] [2023-12-05 21:17:03,151 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:03,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1694001273, now seen corresponding path program 1 times [2023-12-05 21:17:03,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:03,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020380861] [2023-12-05 21:17:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:03,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:03,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:03,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020380861] [2023-12-05 21:17:03,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020380861] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:03,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:03,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802133664] [2023-12-05 21:17:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:03,409 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:03,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:03,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:03,433 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 241 [2023-12-05 21:17:03,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 241 transitions, 489 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:03,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:03,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 241 [2023-12-05 21:17:03,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:03,619 INFO L124 PetriNetUnfolderBase]: 98/1021 cut-off events. [2023-12-05 21:17:03,619 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2023-12-05 21:17:03,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 1021 events. 98/1021 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7259 event pairs, 72 based on Foata normal form. 227/1074 useless extension candidates. Maximal degree in co-relation 1060. Up to 190 conditions per place. [2023-12-05 21:17:03,626 INFO L140 encePairwiseOnDemand]: 209/241 looper letters, 29 selfloop transitions, 2 changer transitions 0/210 dead transitions. [2023-12-05 21:17:03,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 210 transitions, 489 flow [2023-12-05 21:17:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-12-05 21:17:03,637 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8450899031811895 [2023-12-05 21:17:03,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-12-05 21:17:03,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-12-05 21:17:03,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:03,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-12-05 21:17:03,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:03,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:03,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:03,650 INFO L308 CegarLoopForPetriNet]: 209 programPoint places, -4 predicate places. [2023-12-05 21:17:03,651 INFO L500 AbstractCegarLoop]: Abstraction has has 205 places, 210 transitions, 489 flow [2023-12-05 21:17:03,651 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:03,651 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:03,651 INFO L233 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] [2023-12-05 21:17:03,651 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:17:03,652 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:03,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash 161593808, now seen corresponding path program 1 times [2023-12-05 21:17:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:03,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003859929] [2023-12-05 21:17:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:03,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:03,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003859929] [2023-12-05 21:17:03,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003859929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:03,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806312594] [2023-12-05 21:17:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:03,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:03,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:03,732 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) [2023-12-05 21:17:03,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:17:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:03,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:03,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:03,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:03,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806312594] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:03,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:03,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:03,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988469852] [2023-12-05 21:17:03,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:03,878 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:03,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:03,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:03,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:03,882 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 241 [2023-12-05 21:17:03,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 210 transitions, 489 flow. Second operand has 10 states, 10 states have (on average 184.1) internal successors, (1841), 10 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:03,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:03,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 241 [2023-12-05 21:17:03,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:04,134 INFO L124 PetriNetUnfolderBase]: 98/1028 cut-off events. [2023-12-05 21:17:04,134 INFO L125 PetriNetUnfolderBase]: For 114/133 co-relation queries the response was YES. [2023-12-05 21:17:04,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1434 conditions, 1028 events. 98/1028 cut-off events. For 114/133 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7249 event pairs, 72 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 1230. Up to 195 conditions per place. [2023-12-05 21:17:04,143 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 30 selfloop transitions, 9 changer transitions 0/217 dead transitions. [2023-12-05 21:17:04,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 217 transitions, 591 flow [2023-12-05 21:17:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1679 transitions. [2023-12-05 21:17:04,149 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7740894421392347 [2023-12-05 21:17:04,149 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1679 transitions. [2023-12-05 21:17:04,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1679 transitions. [2023-12-05 21:17:04,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:04,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1679 transitions. [2023-12-05 21:17:04,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 186.55555555555554) internal successors, (1679), 9 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:04,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:04,159 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:04,161 INFO L308 CegarLoopForPetriNet]: 209 programPoint places, 4 predicate places. [2023-12-05 21:17:04,161 INFO L500 AbstractCegarLoop]: Abstraction has has 213 places, 217 transitions, 591 flow [2023-12-05 21:17:04,162 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 184.1) internal successors, (1841), 10 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:04,162 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:04,162 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:04,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:04,367 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:04,368 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:04,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2007840816, now seen corresponding path program 2 times [2023-12-05 21:17:04,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:04,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387269295] [2023-12-05 21:17:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387269295] [2023-12-05 21:17:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387269295] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:04,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:04,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:04,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473363711] [2023-12-05 21:17:04,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:04,504 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:04,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:04,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:04,505 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 241 [2023-12-05 21:17:04,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 217 transitions, 591 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:04,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:04,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 241 [2023-12-05 21:17:04,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:04,799 INFO L124 PetriNetUnfolderBase]: 503/2429 cut-off events. [2023-12-05 21:17:04,799 INFO L125 PetriNetUnfolderBase]: For 1015/1019 co-relation queries the response was YES. [2023-12-05 21:17:04,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 2429 events. 503/2429 cut-off events. For 1015/1019 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 21934 event pairs, 396 based on Foata normal form. 0/2076 useless extension candidates. Maximal degree in co-relation 4059. Up to 880 conditions per place. [2023-12-05 21:17:04,811 INFO L140 encePairwiseOnDemand]: 237/241 looper letters, 68 selfloop transitions, 2 changer transitions 0/233 dead transitions. [2023-12-05 21:17:04,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 233 transitions, 795 flow [2023-12-05 21:17:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-12-05 21:17:04,813 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7468879668049793 [2023-12-05 21:17:04,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-12-05 21:17:04,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-12-05 21:17:04,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:04,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-12-05 21:17:04,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:04,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:04,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:04,818 INFO L308 CegarLoopForPetriNet]: 209 programPoint places, 4 predicate places. [2023-12-05 21:17:04,818 INFO L500 AbstractCegarLoop]: Abstraction has has 213 places, 233 transitions, 795 flow [2023-12-05 21:17:04,819 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:04,819 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:04,819 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:04,819 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:17:04,819 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:04,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2007840817, now seen corresponding path program 1 times [2023-12-05 21:17:04,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:04,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538538413] [2023-12-05 21:17:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:04,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:04,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:04,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538538413] [2023-12-05 21:17:04,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538538413] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:04,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358120924] [2023-12-05 21:17:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:04,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:04,962 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) [2023-12-05 21:17:04,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:17:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:05,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:05,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:05,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:05,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358120924] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:05,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:05,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323092121] [2023-12-05 21:17:05,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:05,177 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:05,182 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 241 [2023-12-05 21:17:05,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 233 transitions, 795 flow. Second operand has 18 states, 18 states have (on average 184.27777777777777) internal successors, (3317), 18 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:05,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:05,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 241 [2023-12-05 21:17:05,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:05,616 INFO L124 PetriNetUnfolderBase]: 503/2449 cut-off events. [2023-12-05 21:17:05,616 INFO L125 PetriNetUnfolderBase]: For 2023/2029 co-relation queries the response was YES. [2023-12-05 21:17:05,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4811 conditions, 2449 events. 503/2449 cut-off events. For 2023/2029 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 22032 event pairs, 396 based on Foata normal form. 0/2096 useless extension candidates. Maximal degree in co-relation 4460. Up to 880 conditions per place. [2023-12-05 21:17:05,629 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 46 selfloop transitions, 21 changer transitions 0/253 dead transitions. [2023-12-05 21:17:05,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 253 transitions, 1041 flow [2023-12-05 21:17:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3885 transitions. [2023-12-05 21:17:05,635 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7676348547717843 [2023-12-05 21:17:05,636 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3885 transitions. [2023-12-05 21:17:05,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3885 transitions. [2023-12-05 21:17:05,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:05,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3885 transitions. [2023-12-05 21:17:05,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 185.0) internal successors, (3885), 21 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:05,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:05,676 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:05,678 INFO L308 CegarLoopForPetriNet]: 209 programPoint places, 24 predicate places. [2023-12-05 21:17:05,678 INFO L500 AbstractCegarLoop]: Abstraction has has 233 places, 253 transitions, 1041 flow [2023-12-05 21:17:05,679 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 184.27777777777777) internal successors, (3317), 18 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:05,679 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:05,680 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:05,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:05,884 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,SelfDestructingSolverStorable3 [2023-12-05 21:17:05,885 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:05,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:05,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1987235057, now seen corresponding path program 2 times [2023-12-05 21:17:05,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:05,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950419465] [2023-12-05 21:17:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:05,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:05,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:05,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950419465] [2023-12-05 21:17:05,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950419465] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:05,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:05,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:05,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018011047] [2023-12-05 21:17:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:05,987 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:17:05,988 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 241 [2023-12-05 21:17:05,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 253 transitions, 1041 flow. Second operand has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:05,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:05,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 241 [2023-12-05 21:17:05,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:06,321 INFO L124 PetriNetUnfolderBase]: 771/2789 cut-off events. [2023-12-05 21:17:06,321 INFO L125 PetriNetUnfolderBase]: For 4246/4296 co-relation queries the response was YES. [2023-12-05 21:17:06,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6955 conditions, 2789 events. 771/2789 cut-off events. For 4246/4296 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 24874 event pairs, 128 based on Foata normal form. 0/2575 useless extension candidates. Maximal degree in co-relation 6692. Up to 1159 conditions per place. [2023-12-05 21:17:06,336 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 104 selfloop transitions, 4 changer transitions 0/291 dead transitions. [2023-12-05 21:17:06,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 291 transitions, 1483 flow [2023-12-05 21:17:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:17:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:17:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 701 transitions. [2023-12-05 21:17:06,338 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7271784232365145 [2023-12-05 21:17:06,339 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 701 transitions. [2023-12-05 21:17:06,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 701 transitions. [2023-12-05 21:17:06,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:06,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 701 transitions. [2023-12-05 21:17:06,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,342 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,342 INFO L308 CegarLoopForPetriNet]: 209 programPoint places, 27 predicate places. [2023-12-05 21:17:06,342 INFO L500 AbstractCegarLoop]: Abstraction has has 236 places, 291 transitions, 1483 flow [2023-12-05 21:17:06,343 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,343 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:06,343 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2023-12-05 21:17:06,343 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:17:06,343 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:06,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:06,343 INFO L85 PathProgramCache]: Analyzing trace with hash -291805306, now seen corresponding path program 1 times [2023-12-05 21:17:06,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:06,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536904256] [2023-12-05 21:17:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:06,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:06,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:06,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536904256] [2023-12-05 21:17:06,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536904256] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:06,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526215630] [2023-12-05 21:17:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:06,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:06,582 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) [2023-12-05 21:17:06,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-05 21:17:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:06,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:17:06,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:06,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:06,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526215630] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:06,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:06,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:17:06,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176686273] [2023-12-05 21:17:06,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:06,883 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:17:06,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:17:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:17:06,887 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 241 [2023-12-05 21:17:06,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 291 transitions, 1483 flow. Second operand has 23 states, 23 states have (on average 184.47826086956522) internal successors, (4243), 23 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:06,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:06,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 241 [2023-12-05 21:17:06,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:07,486 INFO L124 PetriNetUnfolderBase]: 807/2867 cut-off events. [2023-12-05 21:17:07,487 INFO L125 PetriNetUnfolderBase]: For 6844/7011 co-relation queries the response was YES. [2023-12-05 21:17:07,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7854 conditions, 2867 events. 807/2867 cut-off events. For 6844/7011 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 25172 event pairs, 618 based on Foata normal form. 0/2632 useless extension candidates. Maximal degree in co-relation 7467. Up to 1192 conditions per place. [2023-12-05 21:17:07,500 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 68 selfloop transitions, 30 changer transitions 0/306 dead transitions. [2023-12-05 21:17:07,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 306 transitions, 1793 flow [2023-12-05 21:17:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:17:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:17:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5537 transitions. [2023-12-05 21:17:07,508 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7658367911479945 [2023-12-05 21:17:07,508 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5537 transitions. [2023-12-05 21:17:07,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5537 transitions. [2023-12-05 21:17:07,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:07,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5537 transitions. [2023-12-05 21:17:07,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 184.56666666666666) internal successors, (5537), 30 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 241.0) internal successors, (7471), 31 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,526 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 241.0) internal successors, (7471), 31 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,526 INFO L308 CegarLoopForPetriNet]: 209 programPoint places, 56 predicate places. [2023-12-05 21:17:07,526 INFO L500 AbstractCegarLoop]: Abstraction has has 265 places, 306 transitions, 1793 flow [2023-12-05 21:17:07,528 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 184.47826086956522) internal successors, (4243), 23 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:07,528 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:07,528 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2023-12-05 21:17:07,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-05 21:17:07,734 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:07,735 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:07,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash 42354045, now seen corresponding path program 2 times [2023-12-05 21:17:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:07,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580378515] [2023-12-05 21:17:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:07,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:07,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:07,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580378515] [2023-12-05 21:17:07,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580378515] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:07,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706267892] [2023-12-05 21:17:07,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:07,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:07,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:07,856 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) [2023-12-05 21:17:07,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-05 21:17:07,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:17:07,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:07,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:17:07,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:07,960 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 [2023-12-05 21:17:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:08,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:08,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706267892] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:08,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:08,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:17:08,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786909741] [2023-12-05 21:17:08,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:08,049 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:17:08,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:17:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:17:08,050 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 241 [2023-12-05 21:17:08,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 306 transitions, 1793 flow. Second operand has 7 states, 7 states have (on average 152.14285714285714) internal successors, (1065), 7 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:08,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 241 [2023-12-05 21:17:08,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:08,624 INFO L124 PetriNetUnfolderBase]: 800/3175 cut-off events. [2023-12-05 21:17:08,624 INFO L125 PetriNetUnfolderBase]: For 9320/9506 co-relation queries the response was YES. [2023-12-05 21:17:08,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9460 conditions, 3175 events. 800/3175 cut-off events. For 9320/9506 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 28521 event pairs, 169 based on Foata normal form. 18/2988 useless extension candidates. Maximal degree in co-relation 9067. Up to 1169 conditions per place. [2023-12-05 21:17:08,642 INFO L140 encePairwiseOnDemand]: 232/241 looper letters, 172 selfloop transitions, 8 changer transitions 0/377 dead transitions. [2023-12-05 21:17:08,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 377 transitions, 2795 flow [2023-12-05 21:17:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:17:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:17:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1368 transitions. [2023-12-05 21:17:08,645 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7095435684647303 [2023-12-05 21:17:08,645 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1368 transitions. [2023-12-05 21:17:08,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1368 transitions. [2023-12-05 21:17:08,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:08,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1368 transitions. [2023-12-05 21:17:08,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,650 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,651 INFO L308 CegarLoopForPetriNet]: 209 programPoint places, 62 predicate places. [2023-12-05 21:17:08,651 INFO L500 AbstractCegarLoop]: Abstraction has has 271 places, 377 transitions, 2795 flow [2023-12-05 21:17:08,651 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.14285714285714) internal successors, (1065), 7 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:08,651 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:08,652 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:08,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:08,857 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:08,857 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:08,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:08,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1312976112, now seen corresponding path program 1 times [2023-12-05 21:17:08,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:08,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067349164] [2023-12-05 21:17:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:08,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:08,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:17:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:08,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:17:08,900 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:17:08,901 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (34 of 35 remaining) [2023-12-05 21:17:08,902 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 35 remaining) [2023-12-05 21:17:08,902 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 35 remaining) [2023-12-05 21:17:08,902 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 35 remaining) [2023-12-05 21:17:08,902 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 35 remaining) [2023-12-05 21:17:08,902 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 35 remaining) [2023-12-05 21:17:08,902 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 35 remaining) [2023-12-05 21:17:08,902 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 35 remaining) [2023-12-05 21:17:08,903 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 35 remaining) [2023-12-05 21:17:08,904 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 35 remaining) [2023-12-05 21:17:08,905 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 35 remaining) [2023-12-05 21:17:08,905 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 35 remaining) [2023-12-05 21:17:08,905 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 35 remaining) [2023-12-05 21:17:08,905 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 35 remaining) [2023-12-05 21:17:08,905 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:17:08,920 INFO L457 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2023-12-05 21:17:08,922 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:17:08,922 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:17:08,964 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:17:08,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 333 transitions, 682 flow [2023-12-05 21:17:09,077 INFO L124 PetriNetUnfolderBase]: 87/579 cut-off events. [2023-12-05 21:17:09,077 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-05 21:17:09,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 579 events. 87/579 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3009 event pairs, 0 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 352. Up to 12 conditions per place. [2023-12-05 21:17:09,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 333 transitions, 682 flow [2023-12-05 21:17:09,088 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 333 transitions, 682 flow [2023-12-05 21:17:09,090 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:09,091 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;@39a1aded, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:09,091 INFO L363 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-12-05 21:17:09,093 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:09,093 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2023-12-05 21:17:09,093 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:09,093 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:09,093 INFO L233 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] [2023-12-05 21:17:09,093 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:09,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:09,093 INFO L85 PathProgramCache]: Analyzing trace with hash -872520121, now seen corresponding path program 1 times [2023-12-05 21:17:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403936159] [2023-12-05 21:17:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:09,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:09,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:09,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403936159] [2023-12-05 21:17:09,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403936159] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:09,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:09,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:09,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549908003] [2023-12-05 21:17:09,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:09,122 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:09,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:09,123 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 333 [2023-12-05 21:17:09,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 333 transitions, 682 flow. Second operand has 3 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:09,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:09,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 333 [2023-12-05 21:17:09,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:10,072 INFO L124 PetriNetUnfolderBase]: 1782/10033 cut-off events. [2023-12-05 21:17:10,072 INFO L125 PetriNetUnfolderBase]: For 122/125 co-relation queries the response was YES. [2023-12-05 21:17:10,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12703 conditions, 10033 events. 1782/10033 cut-off events. For 122/125 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 120986 event pairs, 1464 based on Foata normal form. 3199/11664 useless extension candidates. Maximal degree in co-relation 11329. Up to 2604 conditions per place. [2023-12-05 21:17:10,142 INFO L140 encePairwiseOnDemand]: 288/333 looper letters, 39 selfloop transitions, 2 changer transitions 0/286 dead transitions. [2023-12-05 21:17:10,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 286 transitions, 670 flow [2023-12-05 21:17:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 838 transitions. [2023-12-05 21:17:10,145 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8388388388388388 [2023-12-05 21:17:10,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 838 transitions. [2023-12-05 21:17:10,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 838 transitions. [2023-12-05 21:17:10,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:10,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 838 transitions. [2023-12-05 21:17:10,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,149 INFO L308 CegarLoopForPetriNet]: 287 programPoint places, -7 predicate places. [2023-12-05 21:17:10,149 INFO L500 AbstractCegarLoop]: Abstraction has has 280 places, 286 transitions, 670 flow [2023-12-05 21:17:10,149 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.33333333333334) internal successors, (757), 3 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,149 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:10,150 INFO L233 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] [2023-12-05 21:17:10,150 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:17:10,150 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:10,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash -481353443, now seen corresponding path program 1 times [2023-12-05 21:17:10,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:10,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406929381] [2023-12-05 21:17:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:10,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:10,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:10,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406929381] [2023-12-05 21:17:10,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406929381] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:10,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263482509] [2023-12-05 21:17:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:10,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:10,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:10,187 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) [2023-12-05 21:17:10,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-05 21:17:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:10,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:10,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:10,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:10,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263482509] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:10,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:10,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:10,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722314547] [2023-12-05 21:17:10,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:10,432 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:10,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:10,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:10,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:10,434 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 333 [2023-12-05 21:17:10,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 286 transitions, 670 flow. Second operand has 10 states, 10 states have (on average 252.1) internal successors, (2521), 10 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:10,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:10,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 333 [2023-12-05 21:17:10,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:11,489 INFO L124 PetriNetUnfolderBase]: 1782/10040 cut-off events. [2023-12-05 21:17:11,489 INFO L125 PetriNetUnfolderBase]: For 1152/1281 co-relation queries the response was YES. [2023-12-05 21:17:11,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15331 conditions, 10040 events. 1782/10040 cut-off events. For 1152/1281 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 121099 event pairs, 1464 based on Foata normal form. 0/8472 useless extension candidates. Maximal degree in co-relation 13714. Up to 2609 conditions per place. [2023-12-05 21:17:11,543 INFO L140 encePairwiseOnDemand]: 327/333 looper letters, 40 selfloop transitions, 9 changer transitions 0/293 dead transitions. [2023-12-05 21:17:11,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 293 transitions, 792 flow [2023-12-05 21:17:11,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2301 transitions. [2023-12-05 21:17:11,548 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7677677677677678 [2023-12-05 21:17:11,548 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2301 transitions. [2023-12-05 21:17:11,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2301 transitions. [2023-12-05 21:17:11,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:11,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2301 transitions. [2023-12-05 21:17:11,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 255.66666666666666) internal successors, (2301), 9 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:11,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:11,557 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:11,557 INFO L308 CegarLoopForPetriNet]: 287 programPoint places, 1 predicate places. [2023-12-05 21:17:11,557 INFO L500 AbstractCegarLoop]: Abstraction has has 288 places, 293 transitions, 792 flow [2023-12-05 21:17:11,558 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 252.1) internal successors, (2521), 10 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:11,558 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:11,558 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:11,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:11,762 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,SelfDestructingSolverStorable9 [2023-12-05 21:17:11,763 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:11,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2064817315, now seen corresponding path program 2 times [2023-12-05 21:17:11,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:11,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577874312] [2023-12-05 21:17:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:11,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:11,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:11,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577874312] [2023-12-05 21:17:11,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577874312] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:11,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:11,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:11,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135551551] [2023-12-05 21:17:11,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:11,791 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:11,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:11,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:11,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:11,792 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 333 [2023-12-05 21:17:11,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 293 transitions, 792 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:11,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:11,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 333 [2023-12-05 21:17:11,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:17,764 INFO L124 PetriNetUnfolderBase]: 19582/56113 cut-off events. [2023-12-05 21:17:17,764 INFO L125 PetriNetUnfolderBase]: For 27928/28056 co-relation queries the response was YES. [2023-12-05 21:17:17,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110709 conditions, 56113 events. 19582/56113 cut-off events. For 27928/28056 co-relation queries the response was YES. Maximal size of possible extension queue 2025. Compared 757314 event pairs, 15858 based on Foata normal form. 0/46713 useless extension candidates. Maximal degree in co-relation 8051. Up to 25656 conditions per place. [2023-12-05 21:17:18,267 INFO L140 encePairwiseOnDemand]: 329/333 looper letters, 106 selfloop transitions, 2 changer transitions 0/327 dead transitions. [2023-12-05 21:17:18,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 327 transitions, 1140 flow [2023-12-05 21:17:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-12-05 21:17:18,269 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7527527527527528 [2023-12-05 21:17:18,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-12-05 21:17:18,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-12-05 21:17:18,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:18,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-12-05 21:17:18,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,273 INFO L308 CegarLoopForPetriNet]: 287 programPoint places, 1 predicate places. [2023-12-05 21:17:18,273 INFO L500 AbstractCegarLoop]: Abstraction has has 288 places, 327 transitions, 1140 flow [2023-12-05 21:17:18,274 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,274 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:18,274 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:18,274 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:17:18,274 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:18,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2064817314, now seen corresponding path program 1 times [2023-12-05 21:17:18,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:18,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475684027] [2023-12-05 21:17:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:18,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:18,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475684027] [2023-12-05 21:17:18,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475684027] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:18,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420150312] [2023-12-05 21:17:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:18,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:18,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:18,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:18,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-05 21:17:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:18,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:18,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:18,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:18,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420150312] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:18,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:18,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705281515] [2023-12-05 21:17:18,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:18,527 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:18,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:18,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:18,658 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 333 [2023-12-05 21:17:18,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 327 transitions, 1140 flow. Second operand has 18 states, 18 states have (on average 252.27777777777777) internal successors, (4541), 18 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:18,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 333 [2023-12-05 21:17:18,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:25,093 INFO L124 PetriNetUnfolderBase]: 19582/56133 cut-off events. [2023-12-05 21:17:25,093 INFO L125 PetriNetUnfolderBase]: For 55462/55654 co-relation queries the response was YES. [2023-12-05 21:17:25,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123463 conditions, 56133 events. 19582/56133 cut-off events. For 55462/55654 co-relation queries the response was YES. Maximal size of possible extension queue 2026. Compared 758201 event pairs, 15858 based on Foata normal form. 0/46733 useless extension candidates. Maximal degree in co-relation 9444. Up to 25656 conditions per place. [2023-12-05 21:17:25,707 INFO L140 encePairwiseOnDemand]: 327/333 looper letters, 64 selfloop transitions, 21 changer transitions 0/347 dead transitions. [2023-12-05 21:17:25,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 347 transitions, 1422 flow [2023-12-05 21:17:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5323 transitions. [2023-12-05 21:17:25,719 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7611897611897612 [2023-12-05 21:17:25,719 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5323 transitions. [2023-12-05 21:17:25,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5323 transitions. [2023-12-05 21:17:25,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:25,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5323 transitions. [2023-12-05 21:17:25,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 253.47619047619048) internal successors, (5323), 21 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:25,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:25,736 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 333.0) internal successors, (7326), 22 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:25,737 INFO L308 CegarLoopForPetriNet]: 287 programPoint places, 21 predicate places. [2023-12-05 21:17:25,737 INFO L500 AbstractCegarLoop]: Abstraction has has 308 places, 347 transitions, 1422 flow [2023-12-05 21:17:25,738 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 252.27777777777777) internal successors, (4541), 18 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:25,738 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:25,738 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:25,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-05 21:17:25,943 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:25,944 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:25,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1535871010, now seen corresponding path program 2 times [2023-12-05 21:17:25,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:25,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609187216] [2023-12-05 21:17:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:25,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:26,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:26,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609187216] [2023-12-05 21:17:26,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609187216] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:26,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:26,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:26,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946911762] [2023-12-05 21:17:26,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:26,018 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:26,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:26,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:17:26,019 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 333 [2023-12-05 21:17:26,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 347 transitions, 1422 flow. Second operand has 4 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:26,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:26,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 333 [2023-12-05 21:17:26,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:36,589 INFO L124 PetriNetUnfolderBase]: 38073/87857 cut-off events. [2023-12-05 21:17:36,589 INFO L125 PetriNetUnfolderBase]: For 171804/174349 co-relation queries the response was YES. [2023-12-05 21:17:36,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246632 conditions, 87857 events. 38073/87857 cut-off events. For 171804/174349 co-relation queries the response was YES. Maximal size of possible extension queue 2882. Compared 1138039 event pairs, 19611 based on Foata normal form. 0/79391 useless extension candidates. Maximal degree in co-relation 19461. Up to 45907 conditions per place. [2023-12-05 21:17:37,519 INFO L140 encePairwiseOnDemand]: 327/333 looper letters, 157 selfloop transitions, 4 changer transitions 0/405 dead transitions. [2023-12-05 21:17:37,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 405 transitions, 2084 flow [2023-12-05 21:17:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:17:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:17:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 973 transitions. [2023-12-05 21:17:37,521 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7304804804804805 [2023-12-05 21:17:37,521 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 973 transitions. [2023-12-05 21:17:37,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 973 transitions. [2023-12-05 21:17:37,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:37,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 973 transitions. [2023-12-05 21:17:37,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 243.25) internal successors, (973), 4 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:37,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:37,524 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:37,524 INFO L308 CegarLoopForPetriNet]: 287 programPoint places, 24 predicate places. [2023-12-05 21:17:37,524 INFO L500 AbstractCegarLoop]: Abstraction has has 311 places, 405 transitions, 2084 flow [2023-12-05 21:17:37,524 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:37,524 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:37,525 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2023-12-05 21:17:37,525 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-05 21:17:37,525 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:37,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1028025543, now seen corresponding path program 1 times [2023-12-05 21:17:37,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:37,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746175951] [2023-12-05 21:17:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:37,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:37,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746175951] [2023-12-05 21:17:37,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746175951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:37,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979625909] [2023-12-05 21:17:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:37,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:37,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:37,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:37,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-05 21:17:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:37,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:17:37,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:37,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:38,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979625909] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:38,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:38,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:17:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555422560] [2023-12-05 21:17:38,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:38,016 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:17:38,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:17:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:17:38,019 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 333 [2023-12-05 21:17:38,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 405 transitions, 2084 flow. Second operand has 23 states, 23 states have (on average 252.47826086956522) internal successors, (5807), 23 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:38,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:38,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 333 [2023-12-05 21:17:38,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:49,404 INFO L124 PetriNetUnfolderBase]: 38997/88819 cut-off events. [2023-12-05 21:17:49,404 INFO L125 PetriNetUnfolderBase]: For 263207/266075 co-relation queries the response was YES. [2023-12-05 21:17:49,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273935 conditions, 88819 events. 38997/88819 cut-off events. For 263207/266075 co-relation queries the response was YES. Maximal size of possible extension queue 2882. Compared 1139137 event pairs, 23616 based on Foata normal form. 0/80284 useless extension candidates. Maximal degree in co-relation 20886. Up to 46781 conditions per place. [2023-12-05 21:17:50,470 INFO L140 encePairwiseOnDemand]: 327/333 looper letters, 94 selfloop transitions, 30 changer transitions 0/420 dead transitions. [2023-12-05 21:17:50,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 420 transitions, 2446 flow [2023-12-05 21:17:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:17:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:17:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7587 transitions. [2023-12-05 21:17:50,479 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7594594594594595 [2023-12-05 21:17:50,480 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7587 transitions. [2023-12-05 21:17:50,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7587 transitions. [2023-12-05 21:17:50,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:50,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7587 transitions. [2023-12-05 21:17:50,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 252.9) internal successors, (7587), 30 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:50,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 333.0) internal successors, (10323), 31 states have internal predecessors, (10323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:50,505 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 333.0) internal successors, (10323), 31 states have internal predecessors, (10323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:50,505 INFO L308 CegarLoopForPetriNet]: 287 programPoint places, 53 predicate places. [2023-12-05 21:17:50,506 INFO L500 AbstractCegarLoop]: Abstraction has has 340 places, 420 transitions, 2446 flow [2023-12-05 21:17:50,507 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 252.47826086956522) internal successors, (5807), 23 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:50,507 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:50,507 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2023-12-05 21:17:50,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:50,713 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:50,713 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:50,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:50,714 INFO L85 PathProgramCache]: Analyzing trace with hash -876092957, now seen corresponding path program 2 times [2023-12-05 21:17:50,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:50,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033147740] [2023-12-05 21:17:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:50,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:50,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:50,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033147740] [2023-12-05 21:17:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033147740] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877520676] [2023-12-05 21:17:50,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:50,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:50,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:50,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-05 21:17:50,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:17:50,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:50,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:17:50,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:50,992 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 [2023-12-05 21:17:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:51,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:51,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877520676] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:51,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:51,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:17:51,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537625066] [2023-12-05 21:17:51,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:51,079 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:17:51,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:51,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:17:51,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:17:51,080 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 333 [2023-12-05 21:17:51,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 420 transitions, 2446 flow. Second operand has 7 states, 7 states have (on average 210.14285714285714) internal successors, (1471), 7 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:51,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:51,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 333 [2023-12-05 21:17:51,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:04,253 INFO L124 PetriNetUnfolderBase]: 39207/90476 cut-off events. [2023-12-05 21:18:04,253 INFO L125 PetriNetUnfolderBase]: For 360062/372949 co-relation queries the response was YES. [2023-12-05 21:18:04,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327622 conditions, 90476 events. 39207/90476 cut-off events. For 360062/372949 co-relation queries the response was YES. Maximal size of possible extension queue 2896. Compared 1164203 event pairs, 6495 based on Foata normal form. 86/83113 useless extension candidates. Maximal degree in co-relation 24926. Up to 46121 conditions per place. [2023-12-05 21:18:05,495 INFO L140 encePairwiseOnDemand]: 324/333 looper letters, 313 selfloop transitions, 10 changer transitions 0/581 dead transitions. [2023-12-05 21:18:05,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 581 transitions, 4544 flow [2023-12-05 21:18:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:18:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:18:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2170 transitions. [2023-12-05 21:18:05,498 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7240573907240574 [2023-12-05 21:18:05,498 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2170 transitions. [2023-12-05 21:18:05,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2170 transitions. [2023-12-05 21:18:05,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:05,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2170 transitions. [2023-12-05 21:18:05,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 241.11111111111111) internal successors, (2170), 9 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:05,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:05,504 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 333.0) internal successors, (3330), 10 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:05,505 INFO L308 CegarLoopForPetriNet]: 287 programPoint places, 60 predicate places. [2023-12-05 21:18:05,505 INFO L500 AbstractCegarLoop]: Abstraction has has 347 places, 581 transitions, 4544 flow [2023-12-05 21:18:05,505 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 210.14285714285714) internal successors, (1471), 7 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:05,506 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:05,506 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:05,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-05 21:18:05,710 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-05 21:18:05,711 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:05,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:05,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1786965085, now seen corresponding path program 1 times [2023-12-05 21:18:05,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:05,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79867688] [2023-12-05 21:18:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:05,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:05,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79867688] [2023-12-05 21:18:05,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79867688] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:05,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917853377] [2023-12-05 21:18:05,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:05,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:05,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:05,797 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:05,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-05 21:18:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:05,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-05 21:18:05,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-12-05 21:18:05,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:18:05,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917853377] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:05,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:18:05,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-05 21:18:05,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749034482] [2023-12-05 21:18:05,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:05,901 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:18:05,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:05,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:18:05,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:18:05,902 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 333 [2023-12-05 21:18:05,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 581 transitions, 4544 flow. Second operand has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:05,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:05,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 333 [2023-12-05 21:18:05,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand