/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/09-regions_04-list2_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:12:22,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:12:22,370 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 21:12:22,400 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:12:22,400 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:12:22,401 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:12:22,401 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:12:22,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:12:22,402 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:12:22,405 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:12:22,405 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:12:22,405 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:12:22,405 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:12:22,406 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:12:22,406 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:12:22,406 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:12:22,406 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:12:22,407 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:12:22,407 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:12:22,407 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:12:22,407 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:12:22,408 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:12:22,408 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:12:22,408 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:12:22,408 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:12:22,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:12:22,409 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:12:22,409 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:12:22,409 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:12:22,409 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:12:22,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:12:22,410 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:12:22,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:12:22,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:12:22,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:12:22,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:12:22,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:12:22,641 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:12:22,641 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:12:22,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_04-list2_nr.i [2023-12-05 21:12:23,614 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:12:23,812 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:12:23,812 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_04-list2_nr.i [2023-12-05 21:12:23,825 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79daa77e3/cc16617af6b6485ca9cd97345cb3a8bc/FLAG2580119ae [2023-12-05 21:12:23,834 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79daa77e3/cc16617af6b6485ca9cd97345cb3a8bc [2023-12-05 21:12:23,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:12:23,837 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:12:23,837 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:12:23,837 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:12:23,840 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:12:23,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:12:23" (1/1) ... [2023-12-05 21:12:23,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c8b0691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:23, skipping insertion in model container [2023-12-05 21:12:23,841 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:12:23" (1/1) ... [2023-12-05 21:12:23,872 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:12:24,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:12:24,245 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:12:24,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:12:24,357 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:12:24,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24 WrapperNode [2023-12-05 21:12:24,358 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:12:24,359 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:12:24,359 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:12:24,359 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:12:24,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,387 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,410 INFO L138 Inliner]: procedures = 369, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 91 [2023-12-05 21:12:24,411 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:12:24,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:12:24,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:12:24,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:12:24,422 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,435 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,435 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,446 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,448 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,449 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,452 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:12:24,452 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:12:24,452 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:12:24,452 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:12:24,453 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (1/1) ... [2023-12-05 21:12:24,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:12:24,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:24,510 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 21:12:24,514 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 21:12:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:12:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-05 21:12:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:12:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:12:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:12:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:12:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:12:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-05 21:12:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:12:24,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-05 21:12:24,529 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:12:24,529 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:12:24,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:12:24,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:12:24,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:12:24,530 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 21:12:24,641 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:12:24,643 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:12:24,873 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:12:24,891 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:12:24,891 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-05 21:12:24,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:12:24 BoogieIcfgContainer [2023-12-05 21:12:24,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:12:24,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:12:24,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:12:24,896 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:12:24,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:12:23" (1/3) ... [2023-12-05 21:12:24,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495a0c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:12:24, skipping insertion in model container [2023-12-05 21:12:24,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:24" (2/3) ... [2023-12-05 21:12:24,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495a0c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:12:24, skipping insertion in model container [2023-12-05 21:12:24,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:12:24" (3/3) ... [2023-12-05 21:12:24,898 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_04-list2_nr.i [2023-12-05 21:12:24,912 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:12:24,912 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-12-05 21:12:24,912 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:12:24,959 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:12:24,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 167 transitions, 338 flow [2023-12-05 21:12:25,065 INFO L124 PetriNetUnfolderBase]: 0/166 cut-off events. [2023-12-05 21:12:25,066 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:12:25,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 166 events. 0/166 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 222 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-12-05 21:12:25,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 167 transitions, 338 flow [2023-12-05 21:12:25,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 166 transitions, 335 flow [2023-12-05 21:12:25,091 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:12:25,096 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;@6397fc9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:12:25,097 INFO L363 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-12-05 21:12:25,105 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:12:25,105 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-12-05 21:12:25,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:12:25,105 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:25,106 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] [2023-12-05 21:12:25,107 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:25,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash 679597355, now seen corresponding path program 1 times [2023-12-05 21:12:25,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:25,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169285353] [2023-12-05 21:12:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:25,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:25,485 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 21:12:25,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169285353] [2023-12-05 21:12:25,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169285353] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:25,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:25,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:12:25,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366761330] [2023-12-05 21:12:25,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:25,493 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:12:25,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:25,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:12:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:12:25,519 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 167 [2023-12-05 21:12:25,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 166 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 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 21:12:25,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:25,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 167 [2023-12-05 21:12:25,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:25,931 INFO L124 PetriNetUnfolderBase]: 288/1050 cut-off events. [2023-12-05 21:12:25,931 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:12:25,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1723 conditions, 1050 events. 288/1050 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 6434 event pairs, 176 based on Foata normal form. 0/810 useless extension candidates. Maximal degree in co-relation 1572. Up to 398 conditions per place. [2023-12-05 21:12:25,943 INFO L140 encePairwiseOnDemand]: 144/167 looper letters, 90 selfloop transitions, 18 changer transitions 0/177 dead transitions. [2023-12-05 21:12:25,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 177 transitions, 573 flow [2023-12-05 21:12:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:12:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:12:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 743 transitions. [2023-12-05 21:12:25,959 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.49434464404524286 [2023-12-05 21:12:25,960 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 743 transitions. [2023-12-05 21:12:25,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 743 transitions. [2023-12-05 21:12:25,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:25,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 743 transitions. [2023-12-05 21:12:25,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 82.55555555555556) internal successors, (743), 9 states have internal predecessors, (743), 0 states have call successors, (0), 0 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 21:12:25,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 167.0) internal successors, (1670), 10 states have internal predecessors, (1670), 0 states have call successors, (0), 0 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 21:12:25,974 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 167.0) internal successors, (1670), 10 states have internal predecessors, (1670), 0 states have call successors, (0), 0 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 21:12:25,978 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 3 predicate places. [2023-12-05 21:12:25,978 INFO L500 AbstractCegarLoop]: Abstraction has has 173 places, 177 transitions, 573 flow [2023-12-05 21:12:25,979 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 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 21:12:25,979 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:25,979 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] [2023-12-05 21:12:25,980 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:12:25,980 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:25,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 679597356, now seen corresponding path program 1 times [2023-12-05 21:12:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:25,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464146301] [2023-12-05 21:12:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:26,104 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 21:12:26,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:26,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464146301] [2023-12-05 21:12:26,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464146301] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:26,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:26,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:12:26,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814760951] [2023-12-05 21:12:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:26,105 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:12:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:12:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:12:26,107 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 167 [2023-12-05 21:12:26,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 177 transitions, 573 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 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 21:12:26,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:26,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 167 [2023-12-05 21:12:26,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:26,410 INFO L124 PetriNetUnfolderBase]: 411/1356 cut-off events. [2023-12-05 21:12:26,410 INFO L125 PetriNetUnfolderBase]: For 294/319 co-relation queries the response was YES. [2023-12-05 21:12:26,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2919 conditions, 1356 events. 411/1356 cut-off events. For 294/319 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 8973 event pairs, 289 based on Foata normal form. 0/1242 useless extension candidates. Maximal degree in co-relation 2716. Up to 731 conditions per place. [2023-12-05 21:12:26,417 INFO L140 encePairwiseOnDemand]: 157/167 looper letters, 90 selfloop transitions, 8 changer transitions 0/175 dead transitions. [2023-12-05 21:12:26,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 175 transitions, 761 flow [2023-12-05 21:12:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:12:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:12:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 594 transitions. [2023-12-05 21:12:26,419 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5081266039349872 [2023-12-05 21:12:26,419 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 594 transitions. [2023-12-05 21:12:26,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 594 transitions. [2023-12-05 21:12:26,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:26,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 594 transitions. [2023-12-05 21:12:26,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 21:12:26,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:26,423 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:26,423 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 7 predicate places. [2023-12-05 21:12:26,424 INFO L500 AbstractCegarLoop]: Abstraction has has 177 places, 175 transitions, 761 flow [2023-12-05 21:12:26,424 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 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 21:12:26,424 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:26,424 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:12:26,424 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:12:26,425 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:26,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash -401111851, now seen corresponding path program 1 times [2023-12-05 21:12:26,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:26,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392903166] [2023-12-05 21:12:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:26,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:26,527 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 21:12:26,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392903166] [2023-12-05 21:12:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392903166] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:26,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:26,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:12:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248765867] [2023-12-05 21:12:26,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:26,529 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:12:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:12:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:12:26,530 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 167 [2023-12-05 21:12:26,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 175 transitions, 761 flow. Second operand has 6 states, 6 states have (on average 74.5) internal successors, (447), 6 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:26,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:26,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 167 [2023-12-05 21:12:26,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:26,796 INFO L124 PetriNetUnfolderBase]: 402/1345 cut-off events. [2023-12-05 21:12:26,796 INFO L125 PetriNetUnfolderBase]: For 987/1052 co-relation queries the response was YES. [2023-12-05 21:12:26,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1345 events. 402/1345 cut-off events. For 987/1052 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8897 event pairs, 238 based on Foata normal form. 35/1311 useless extension candidates. Maximal degree in co-relation 3375. Up to 751 conditions per place. [2023-12-05 21:12:26,803 INFO L140 encePairwiseOnDemand]: 148/167 looper letters, 101 selfloop transitions, 15 changer transitions 2/188 dead transitions. [2023-12-05 21:12:26,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 188 transitions, 1069 flow [2023-12-05 21:12:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:12:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:12:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 746 transitions. [2023-12-05 21:12:26,805 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4963406520292748 [2023-12-05 21:12:26,805 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 746 transitions. [2023-12-05 21:12:26,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 746 transitions. [2023-12-05 21:12:26,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:26,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 746 transitions. [2023-12-05 21:12:26,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 82.88888888888889) internal successors, (746), 9 states have internal predecessors, (746), 0 states have call successors, (0), 0 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 21:12:26,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 167.0) internal successors, (1670), 10 states have internal predecessors, (1670), 0 states have call successors, (0), 0 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 21:12:26,809 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 167.0) internal successors, (1670), 10 states have internal predecessors, (1670), 0 states have call successors, (0), 0 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 21:12:26,810 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 12 predicate places. [2023-12-05 21:12:26,810 INFO L500 AbstractCegarLoop]: Abstraction has has 182 places, 188 transitions, 1069 flow [2023-12-05 21:12:26,810 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.5) internal successors, (447), 6 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:26,811 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:26,811 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:12:26,811 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:12:26,811 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:26,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:26,811 INFO L85 PathProgramCache]: Analyzing trace with hash -401111850, now seen corresponding path program 1 times [2023-12-05 21:12:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:26,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362890351] [2023-12-05 21:12:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:26,964 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 21:12:26,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:26,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362890351] [2023-12-05 21:12:26,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362890351] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:26,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:26,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:12:26,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260795533] [2023-12-05 21:12:26,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:26,968 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:12:26,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:26,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:12:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:12:26,970 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 167 [2023-12-05 21:12:26,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 188 transitions, 1069 flow. Second operand has 6 states, 6 states have (on average 76.33333333333333) internal successors, (458), 6 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 21:12:26,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:26,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 167 [2023-12-05 21:12:26,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:27,251 INFO L124 PetriNetUnfolderBase]: 363/1235 cut-off events. [2023-12-05 21:12:27,251 INFO L125 PetriNetUnfolderBase]: For 1920/2044 co-relation queries the response was YES. [2023-12-05 21:12:27,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3963 conditions, 1235 events. 363/1235 cut-off events. For 1920/2044 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7980 event pairs, 201 based on Foata normal form. 41/1248 useless extension candidates. Maximal degree in co-relation 3668. Up to 678 conditions per place. [2023-12-05 21:12:27,258 INFO L140 encePairwiseOnDemand]: 155/167 looper letters, 91 selfloop transitions, 7 changer transitions 2/182 dead transitions. [2023-12-05 21:12:27,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 182 transitions, 1229 flow [2023-12-05 21:12:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:12:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:12:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 595 transitions. [2023-12-05 21:12:27,260 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5089820359281437 [2023-12-05 21:12:27,260 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 595 transitions. [2023-12-05 21:12:27,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 595 transitions. [2023-12-05 21:12:27,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:27,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 595 transitions. [2023-12-05 21:12:27,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 0 states have call successors, (0), 0 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 21:12:27,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:27,263 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:27,263 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 13 predicate places. [2023-12-05 21:12:27,264 INFO L500 AbstractCegarLoop]: Abstraction has has 183 places, 182 transitions, 1229 flow [2023-12-05 21:12:27,264 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.33333333333333) internal successors, (458), 6 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 21:12:27,264 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:27,264 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:12:27,264 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:12:27,264 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:27,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:27,265 INFO L85 PathProgramCache]: Analyzing trace with hash 633924034, now seen corresponding path program 1 times [2023-12-05 21:12:27,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:27,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881533989] [2023-12-05 21:12:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:27,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:12:27,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:27,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881533989] [2023-12-05 21:12:27,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881533989] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:27,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:27,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:12:27,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546405804] [2023-12-05 21:12:27,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:27,402 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:12:27,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:27,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:12:27,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:12:27,403 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 167 [2023-12-05 21:12:27,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 182 transitions, 1229 flow. Second operand has 6 states, 6 states have (on average 77.83333333333333) internal successors, (467), 6 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 21:12:27,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:27,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 167 [2023-12-05 21:12:27,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:27,644 INFO L124 PetriNetUnfolderBase]: 336/1153 cut-off events. [2023-12-05 21:12:27,644 INFO L125 PetriNetUnfolderBase]: For 2982/3132 co-relation queries the response was YES. [2023-12-05 21:12:27,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4296 conditions, 1153 events. 336/1153 cut-off events. For 2982/3132 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7297 event pairs, 185 based on Foata normal form. 39/1167 useless extension candidates. Maximal degree in co-relation 3964. Up to 611 conditions per place. [2023-12-05 21:12:27,651 INFO L140 encePairwiseOnDemand]: 155/167 looper letters, 90 selfloop transitions, 7 changer transitions 2/177 dead transitions. [2023-12-05 21:12:27,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 177 transitions, 1389 flow [2023-12-05 21:12:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:12:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:12:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 592 transitions. [2023-12-05 21:12:27,652 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5064157399486741 [2023-12-05 21:12:27,653 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 592 transitions. [2023-12-05 21:12:27,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 592 transitions. [2023-12-05 21:12:27,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:27,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 592 transitions. [2023-12-05 21:12:27,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 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 21:12:27,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:27,655 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:27,656 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 14 predicate places. [2023-12-05 21:12:27,656 INFO L500 AbstractCegarLoop]: Abstraction has has 184 places, 177 transitions, 1389 flow [2023-12-05 21:12:27,656 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.83333333333333) internal successors, (467), 6 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 21:12:27,657 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:27,657 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:12:27,657 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:12:27,657 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:27,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:27,657 INFO L85 PathProgramCache]: Analyzing trace with hash 633924033, now seen corresponding path program 1 times [2023-12-05 21:12:27,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:27,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252536868] [2023-12-05 21:12:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:27,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:27,728 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 21:12:27,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:27,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252536868] [2023-12-05 21:12:27,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252536868] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:27,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:27,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:12:27,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17448475] [2023-12-05 21:12:27,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:27,729 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:12:27,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:27,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:12:27,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:12:27,730 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 167 [2023-12-05 21:12:27,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 177 transitions, 1389 flow. Second operand has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 21:12:27,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:27,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 167 [2023-12-05 21:12:27,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:27,963 INFO L124 PetriNetUnfolderBase]: 308/1105 cut-off events. [2023-12-05 21:12:27,963 INFO L125 PetriNetUnfolderBase]: For 4234/4459 co-relation queries the response was YES. [2023-12-05 21:12:27,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4675 conditions, 1105 events. 308/1105 cut-off events. For 4234/4459 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6829 event pairs, 174 based on Foata normal form. 34/1115 useless extension candidates. Maximal degree in co-relation 4304. Up to 601 conditions per place. [2023-12-05 21:12:27,969 INFO L140 encePairwiseOnDemand]: 148/167 looper letters, 100 selfloop transitions, 16 changer transitions 4/187 dead transitions. [2023-12-05 21:12:27,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 187 transitions, 1737 flow [2023-12-05 21:12:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:12:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:12:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 734 transitions. [2023-12-05 21:12:27,971 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48835662009314706 [2023-12-05 21:12:27,971 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 734 transitions. [2023-12-05 21:12:27,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 734 transitions. [2023-12-05 21:12:27,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:27,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 734 transitions. [2023-12-05 21:12:27,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.55555555555556) internal successors, (734), 9 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 21:12:27,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 167.0) internal successors, (1670), 10 states have internal predecessors, (1670), 0 states have call successors, (0), 0 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 21:12:27,974 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 167.0) internal successors, (1670), 10 states have internal predecessors, (1670), 0 states have call successors, (0), 0 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 21:12:27,975 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 19 predicate places. [2023-12-05 21:12:27,975 INFO L500 AbstractCegarLoop]: Abstraction has has 189 places, 187 transitions, 1737 flow [2023-12-05 21:12:27,975 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 21:12:27,975 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:27,975 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, 1, 1, 1, 1, 1, 1, 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 21:12:27,975 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:12:27,976 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:27,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash -275313270, now seen corresponding path program 1 times [2023-12-05 21:12:27,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:27,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612221115] [2023-12-05 21:12:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:27,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:28,086 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 21:12:28,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:28,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612221115] [2023-12-05 21:12:28,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612221115] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:28,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:28,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:12:28,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036319417] [2023-12-05 21:12:28,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:28,091 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:12:28,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:12:28,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:12:28,093 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 167 [2023-12-05 21:12:28,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 187 transitions, 1737 flow. Second operand has 6 states, 6 states have (on average 76.33333333333333) internal successors, (458), 6 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 21:12:28,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:28,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 167 [2023-12-05 21:12:28,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:28,324 INFO L124 PetriNetUnfolderBase]: 308/1089 cut-off events. [2023-12-05 21:12:28,324 INFO L125 PetriNetUnfolderBase]: For 5727/5844 co-relation queries the response was YES. [2023-12-05 21:12:28,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5311 conditions, 1089 events. 308/1089 cut-off events. For 5727/5844 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 6723 event pairs, 90 based on Foata normal form. 0/1080 useless extension candidates. Maximal degree in co-relation 4899. Up to 600 conditions per place. [2023-12-05 21:12:28,331 INFO L140 encePairwiseOnDemand]: 148/167 looper letters, 115 selfloop transitions, 18 changer transitions 4/200 dead transitions. [2023-12-05 21:12:28,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 200 transitions, 2169 flow [2023-12-05 21:12:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:12:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:12:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 654 transitions. [2023-12-05 21:12:28,333 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48952095808383234 [2023-12-05 21:12:28,333 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 654 transitions. [2023-12-05 21:12:28,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 654 transitions. [2023-12-05 21:12:28,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:28,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 654 transitions. [2023-12-05 21:12:28,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.75) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 0 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 21:12:28,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 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 21:12:28,337 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 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 21:12:28,338 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 25 predicate places. [2023-12-05 21:12:28,338 INFO L500 AbstractCegarLoop]: Abstraction has has 195 places, 200 transitions, 2169 flow [2023-12-05 21:12:28,338 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.33333333333333) internal successors, (458), 6 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 21:12:28,339 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:28,339 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, 1, 1, 1, 1, 1, 1, 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 21:12:28,339 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:12:28,339 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:28,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash -275313269, now seen corresponding path program 1 times [2023-12-05 21:12:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:28,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107643509] [2023-12-05 21:12:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:28,514 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 21:12:28,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:28,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107643509] [2023-12-05 21:12:28,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107643509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:28,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:28,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:12:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748328036] [2023-12-05 21:12:28,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:28,515 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:12:28,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:28,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:12:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:12:28,516 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 167 [2023-12-05 21:12:28,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 200 transitions, 2169 flow. Second operand has 6 states, 6 states have (on average 78.16666666666667) internal successors, (469), 6 states have internal predecessors, (469), 0 states have call successors, (0), 0 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 21:12:28,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:28,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 167 [2023-12-05 21:12:28,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:28,761 INFO L124 PetriNetUnfolderBase]: 308/1092 cut-off events. [2023-12-05 21:12:28,761 INFO L125 PetriNetUnfolderBase]: For 7664/7799 co-relation queries the response was YES. [2023-12-05 21:12:28,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5926 conditions, 1092 events. 308/1092 cut-off events. For 7664/7799 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 6788 event pairs, 38 based on Foata normal form. 10/1099 useless extension candidates. Maximal degree in co-relation 5485. Up to 598 conditions per place. [2023-12-05 21:12:28,769 INFO L140 encePairwiseOnDemand]: 157/167 looper letters, 106 selfloop transitions, 8 changer transitions 4/202 dead transitions. [2023-12-05 21:12:28,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 202 transitions, 2405 flow [2023-12-05 21:12:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:12:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:12:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 593 transitions. [2023-12-05 21:12:28,771 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5072711719418306 [2023-12-05 21:12:28,771 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 593 transitions. [2023-12-05 21:12:28,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 593 transitions. [2023-12-05 21:12:28,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:28,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 593 transitions. [2023-12-05 21:12:28,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.71428571428571) internal successors, (593), 7 states have internal predecessors, (593), 0 states have call successors, (0), 0 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 21:12:28,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:28,774 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:28,774 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 29 predicate places. [2023-12-05 21:12:28,774 INFO L500 AbstractCegarLoop]: Abstraction has has 199 places, 202 transitions, 2405 flow [2023-12-05 21:12:28,775 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.16666666666667) internal successors, (469), 6 states have internal predecessors, (469), 0 states have call successors, (0), 0 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 21:12:28,775 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:28,775 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:28,775 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:12:28,775 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:28,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:28,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1460450671, now seen corresponding path program 1 times [2023-12-05 21:12:28,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:28,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577477309] [2023-12-05 21:12:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:29,100 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 21:12:29,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:29,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577477309] [2023-12-05 21:12:29,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577477309] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:29,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:29,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-05 21:12:29,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701231241] [2023-12-05 21:12:29,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:29,101 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-05 21:12:29,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:29,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-05 21:12:29,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-05 21:12:29,102 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 167 [2023-12-05 21:12:29,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 202 transitions, 2405 flow. Second operand has 12 states, 12 states have (on average 62.166666666666664) internal successors, (746), 12 states have internal predecessors, (746), 0 states have call successors, (0), 0 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 21:12:29,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:29,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 167 [2023-12-05 21:12:29,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:29,375 INFO L124 PetriNetUnfolderBase]: 342/1173 cut-off events. [2023-12-05 21:12:29,376 INFO L125 PetriNetUnfolderBase]: For 10466/10518 co-relation queries the response was YES. [2023-12-05 21:12:29,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6988 conditions, 1173 events. 342/1173 cut-off events. For 10466/10518 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7200 event pairs, 60 based on Foata normal form. 1/1173 useless extension candidates. Maximal degree in co-relation 6499. Up to 625 conditions per place. [2023-12-05 21:12:29,384 INFO L140 encePairwiseOnDemand]: 160/167 looper letters, 136 selfloop transitions, 6 changer transitions 6/206 dead transitions. [2023-12-05 21:12:29,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 206 transitions, 2765 flow [2023-12-05 21:12:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:12:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:12:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 390 transitions. [2023-12-05 21:12:29,386 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.46706586826347307 [2023-12-05 21:12:29,386 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 390 transitions. [2023-12-05 21:12:29,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 390 transitions. [2023-12-05 21:12:29,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:29,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 390 transitions. [2023-12-05 21:12:29,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:29,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 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 21:12:29,389 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 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 21:12:29,389 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 32 predicate places. [2023-12-05 21:12:29,389 INFO L500 AbstractCegarLoop]: Abstraction has has 202 places, 206 transitions, 2765 flow [2023-12-05 21:12:29,389 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.166666666666664) internal successors, (746), 12 states have internal predecessors, (746), 0 states have call successors, (0), 0 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 21:12:29,390 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:29,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:29,390 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:12:29,390 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:29,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1460450672, now seen corresponding path program 1 times [2023-12-05 21:12:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562168182] [2023-12-05 21:12:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:29,752 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 21:12:29,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:29,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562168182] [2023-12-05 21:12:29,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562168182] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:29,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:29,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-05 21:12:29,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765490657] [2023-12-05 21:12:29,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:29,753 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-05 21:12:29,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-05 21:12:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-05 21:12:29,755 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 167 [2023-12-05 21:12:29,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 206 transitions, 2765 flow. Second operand has 8 states, 8 states have (on average 79.375) internal successors, (635), 8 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 21:12:29,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:29,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 167 [2023-12-05 21:12:29,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:30,115 INFO L124 PetriNetUnfolderBase]: 356/1200 cut-off events. [2023-12-05 21:12:30,116 INFO L125 PetriNetUnfolderBase]: For 13719/13777 co-relation queries the response was YES. [2023-12-05 21:12:30,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7820 conditions, 1200 events. 356/1200 cut-off events. For 13719/13777 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7427 event pairs, 39 based on Foata normal form. 1/1200 useless extension candidates. Maximal degree in co-relation 7308. Up to 632 conditions per place. [2023-12-05 21:12:30,129 INFO L140 encePairwiseOnDemand]: 157/167 looper letters, 151 selfloop transitions, 9 changer transitions 12/247 dead transitions. [2023-12-05 21:12:30,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 247 transitions, 3759 flow [2023-12-05 21:12:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:12:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:12:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 634 transitions. [2023-12-05 21:12:30,131 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.542343883661249 [2023-12-05 21:12:30,131 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 634 transitions. [2023-12-05 21:12:30,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 634 transitions. [2023-12-05 21:12:30,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:30,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 634 transitions. [2023-12-05 21:12:30,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.57142857142857) internal successors, (634), 7 states have internal predecessors, (634), 0 states have call successors, (0), 0 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 21:12:30,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:30,134 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:12:30,135 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 37 predicate places. [2023-12-05 21:12:30,135 INFO L500 AbstractCegarLoop]: Abstraction has has 207 places, 247 transitions, 3759 flow [2023-12-05 21:12:30,135 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 79.375) internal successors, (635), 8 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 21:12:30,135 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:30,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:30,135 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:12:30,136 INFO L425 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:30,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash 774105485, now seen corresponding path program 1 times [2023-12-05 21:12:30,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:30,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812409454] [2023-12-05 21:12:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:30,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:30,997 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 21:12:30,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:30,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812409454] [2023-12-05 21:12:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812409454] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:30,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-12-05 21:12:30,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219275114] [2023-12-05 21:12:30,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:30,998 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:12:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:12:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:12:31,000 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 167 [2023-12-05 21:12:31,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 247 transitions, 3759 flow. Second operand has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 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 21:12:31,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:31,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 167 [2023-12-05 21:12:31,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:32,299 INFO L124 PetriNetUnfolderBase]: 415/1380 cut-off events. [2023-12-05 21:12:32,299 INFO L125 PetriNetUnfolderBase]: For 19042/19122 co-relation queries the response was YES. [2023-12-05 21:12:32,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9773 conditions, 1380 events. 415/1380 cut-off events. For 19042/19122 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9025 event pairs, 5 based on Foata normal form. 40/1419 useless extension candidates. Maximal degree in co-relation 9208. Up to 736 conditions per place. [2023-12-05 21:12:32,308 INFO L140 encePairwiseOnDemand]: 127/167 looper letters, 184 selfloop transitions, 72 changer transitions 12/324 dead transitions. [2023-12-05 21:12:32,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 324 transitions, 5693 flow [2023-12-05 21:12:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:12:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:12:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1746 transitions. [2023-12-05 21:12:32,312 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.34850299401197604 [2023-12-05 21:12:32,312 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1746 transitions. [2023-12-05 21:12:32,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1746 transitions. [2023-12-05 21:12:32,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:32,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1746 transitions. [2023-12-05 21:12:32,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.2) internal successors, (1746), 30 states have internal predecessors, (1746), 0 states have call successors, (0), 0 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 21:12:32,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 167.0) internal successors, (5177), 31 states have internal predecessors, (5177), 0 states have call successors, (0), 0 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 21:12:32,320 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 167.0) internal successors, (5177), 31 states have internal predecessors, (5177), 0 states have call successors, (0), 0 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 21:12:32,321 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 66 predicate places. [2023-12-05 21:12:32,321 INFO L500 AbstractCegarLoop]: Abstraction has has 236 places, 324 transitions, 5693 flow [2023-12-05 21:12:32,321 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 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 21:12:32,321 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:32,321 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:32,321 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:12:32,322 INFO L425 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:32,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:32,322 INFO L85 PathProgramCache]: Analyzing trace with hash 774105486, now seen corresponding path program 1 times [2023-12-05 21:12:32,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:32,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632690731] [2023-12-05 21:12:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:32,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:33,526 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 21:12:33,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:33,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632690731] [2023-12-05 21:12:33,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632690731] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:33,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:33,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-12-05 21:12:33,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139612849] [2023-12-05 21:12:33,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:33,527 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:12:33,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:33,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:12:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:12:33,528 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 167 [2023-12-05 21:12:33,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 324 transitions, 5693 flow. Second operand has 23 states, 23 states have (on average 52.34782608695652) internal successors, (1204), 23 states have internal predecessors, (1204), 0 states have call successors, (0), 0 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 21:12:33,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:33,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 167 [2023-12-05 21:12:33,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:34,871 INFO L124 PetriNetUnfolderBase]: 374/1267 cut-off events. [2023-12-05 21:12:34,872 INFO L125 PetriNetUnfolderBase]: For 20917/21027 co-relation queries the response was YES. [2023-12-05 21:12:34,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9897 conditions, 1267 events. 374/1267 cut-off events. For 20917/21027 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8084 event pairs, 3 based on Foata normal form. 60/1326 useless extension candidates. Maximal degree in co-relation 9280. Up to 658 conditions per place. [2023-12-05 21:12:34,884 INFO L140 encePairwiseOnDemand]: 129/167 looper letters, 194 selfloop transitions, 65 changer transitions 12/320 dead transitions. [2023-12-05 21:12:34,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 320 transitions, 6201 flow [2023-12-05 21:12:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-05 21:12:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-12-05 21:12:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1772 transitions. [2023-12-05 21:12:34,888 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3315868263473054 [2023-12-05 21:12:34,889 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1772 transitions. [2023-12-05 21:12:34,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1772 transitions. [2023-12-05 21:12:34,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:34,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1772 transitions. [2023-12-05 21:12:34,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.375) internal successors, (1772), 32 states have internal predecessors, (1772), 0 states have call successors, (0), 0 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 21:12:34,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 167.0) internal successors, (5511), 33 states have internal predecessors, (5511), 0 states have call successors, (0), 0 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 21:12:34,900 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 167.0) internal successors, (5511), 33 states have internal predecessors, (5511), 0 states have call successors, (0), 0 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 21:12:34,901 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 95 predicate places. [2023-12-05 21:12:34,901 INFO L500 AbstractCegarLoop]: Abstraction has has 265 places, 320 transitions, 6201 flow [2023-12-05 21:12:34,902 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.34782608695652) internal successors, (1204), 23 states have internal predecessors, (1204), 0 states have call successors, (0), 0 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 21:12:34,902 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:34,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:34,902 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:12:34,902 INFO L425 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:34,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1705913203, now seen corresponding path program 1 times [2023-12-05 21:12:34,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:34,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445667439] [2023-12-05 21:12:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:34,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:36,134 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 21:12:36,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:36,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445667439] [2023-12-05 21:12:36,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445667439] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:36,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:36,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-12-05 21:12:36,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785538523] [2023-12-05 21:12:36,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:36,135 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-05 21:12:36,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:36,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-05 21:12:36,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2023-12-05 21:12:36,137 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 167 [2023-12-05 21:12:36,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 320 transitions, 6201 flow. Second operand has 24 states, 24 states have (on average 52.333333333333336) internal successors, (1256), 24 states have internal predecessors, (1256), 0 states have call successors, (0), 0 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 21:12:36,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:36,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 167 [2023-12-05 21:12:36,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:37,629 INFO L124 PetriNetUnfolderBase]: 547/1763 cut-off events. [2023-12-05 21:12:37,630 INFO L125 PetriNetUnfolderBase]: For 34015/34192 co-relation queries the response was YES. [2023-12-05 21:12:37,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14818 conditions, 1763 events. 547/1763 cut-off events. For 34015/34192 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 12661 event pairs, 42 based on Foata normal form. 34/1794 useless extension candidates. Maximal degree in co-relation 14149. Up to 938 conditions per place. [2023-12-05 21:12:37,643 INFO L140 encePairwiseOnDemand]: 129/167 looper letters, 298 selfloop transitions, 78 changer transitions 14/445 dead transitions. [2023-12-05 21:12:37,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 445 transitions, 9795 flow [2023-12-05 21:12:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-05 21:12:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-12-05 21:12:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1986 transitions. [2023-12-05 21:12:37,647 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3397775876817793 [2023-12-05 21:12:37,647 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1986 transitions. [2023-12-05 21:12:37,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1986 transitions. [2023-12-05 21:12:37,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:37,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1986 transitions. [2023-12-05 21:12:37,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 56.74285714285714) internal successors, (1986), 35 states have internal predecessors, (1986), 0 states have call successors, (0), 0 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 21:12:37,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 167.0) internal successors, (6012), 36 states have internal predecessors, (6012), 0 states have call successors, (0), 0 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 21:12:37,656 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 167.0) internal successors, (6012), 36 states have internal predecessors, (6012), 0 states have call successors, (0), 0 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 21:12:37,656 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 129 predicate places. [2023-12-05 21:12:37,656 INFO L500 AbstractCegarLoop]: Abstraction has has 299 places, 445 transitions, 9795 flow [2023-12-05 21:12:37,657 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.333333333333336) internal successors, (1256), 24 states have internal predecessors, (1256), 0 states have call successors, (0), 0 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 21:12:37,657 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:37,657 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:37,657 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-05 21:12:37,657 INFO L425 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:37,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1705913204, now seen corresponding path program 1 times [2023-12-05 21:12:37,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:37,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116004394] [2023-12-05 21:12:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:37,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:38,505 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 21:12:38,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116004394] [2023-12-05 21:12:38,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116004394] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:38,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:38,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-12-05 21:12:38,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795414071] [2023-12-05 21:12:38,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:38,506 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-05 21:12:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-05 21:12:38,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-12-05 21:12:38,508 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 167 [2023-12-05 21:12:38,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 445 transitions, 9795 flow. Second operand has 24 states, 24 states have (on average 55.375) internal successors, (1329), 24 states have internal predecessors, (1329), 0 states have call successors, (0), 0 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 21:12:38,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:38,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 167 [2023-12-05 21:12:38,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:39,727 INFO L124 PetriNetUnfolderBase]: 521/1691 cut-off events. [2023-12-05 21:12:39,727 INFO L125 PetriNetUnfolderBase]: For 38522/38729 co-relation queries the response was YES. [2023-12-05 21:12:39,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15216 conditions, 1691 events. 521/1691 cut-off events. For 38522/38729 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 11940 event pairs, 32 based on Foata normal form. 34/1722 useless extension candidates. Maximal degree in co-relation 14494. Up to 890 conditions per place. [2023-12-05 21:12:39,743 INFO L140 encePairwiseOnDemand]: 130/167 looper letters, 272 selfloop transitions, 73 changer transitions 14/435 dead transitions. [2023-12-05 21:12:39,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 435 transitions, 10257 flow [2023-12-05 21:12:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-05 21:12:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-12-05 21:12:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1673 transitions. [2023-12-05 21:12:39,746 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.35778443113772457 [2023-12-05 21:12:39,746 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1673 transitions. [2023-12-05 21:12:39,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1673 transitions. [2023-12-05 21:12:39,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:39,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1673 transitions. [2023-12-05 21:12:39,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 59.75) internal successors, (1673), 28 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:39,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 167.0) internal successors, (4843), 29 states have internal predecessors, (4843), 0 states have call successors, (0), 0 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 21:12:39,754 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 167.0) internal successors, (4843), 29 states have internal predecessors, (4843), 0 states have call successors, (0), 0 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 21:12:39,754 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 155 predicate places. [2023-12-05 21:12:39,754 INFO L500 AbstractCegarLoop]: Abstraction has has 325 places, 435 transitions, 10257 flow [2023-12-05 21:12:39,755 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.375) internal successors, (1329), 24 states have internal predecessors, (1329), 0 states have call successors, (0), 0 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 21:12:39,755 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:39,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:39,755 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-05 21:12:39,755 INFO L425 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:39,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash -320796431, now seen corresponding path program 1 times [2023-12-05 21:12:39,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:39,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650764424] [2023-12-05 21:12:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:39,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:39,828 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 21:12:39,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:39,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650764424] [2023-12-05 21:12:39,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650764424] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:39,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:39,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:12:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342288007] [2023-12-05 21:12:39,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:39,829 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:12:39,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:12:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:12:39,830 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 167 [2023-12-05 21:12:39,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 435 transitions, 10257 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 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 21:12:39,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:39,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 167 [2023-12-05 21:12:39,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:40,065 INFO L124 PetriNetUnfolderBase]: 359/1250 cut-off events. [2023-12-05 21:12:40,065 INFO L125 PetriNetUnfolderBase]: For 29448/29601 co-relation queries the response was YES. [2023-12-05 21:12:40,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11447 conditions, 1250 events. 359/1250 cut-off events. For 29448/29601 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8259 event pairs, 18 based on Foata normal form. 10/1258 useless extension candidates. Maximal degree in co-relation 10717. Up to 618 conditions per place. [2023-12-05 21:12:40,073 INFO L140 encePairwiseOnDemand]: 161/167 looper letters, 40 selfloop transitions, 29 changer transitions 14/332 dead transitions. [2023-12-05 21:12:40,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 332 transitions, 7745 flow [2023-12-05 21:12:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:12:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:12:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-12-05 21:12:40,074 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9560878243512974 [2023-12-05 21:12:40,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-12-05 21:12:40,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-12-05 21:12:40,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:40,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-12-05 21:12:40,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 21:12:40,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 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 21:12:40,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 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 21:12:40,076 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 149 predicate places. [2023-12-05 21:12:40,076 INFO L500 AbstractCegarLoop]: Abstraction has has 319 places, 332 transitions, 7745 flow [2023-12-05 21:12:40,076 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 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 21:12:40,076 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:40,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:40,076 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-05 21:12:40,076 INFO L425 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:40,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2035703609, now seen corresponding path program 1 times [2023-12-05 21:12:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:40,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496501732] [2023-12-05 21:12:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:40,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:40,850 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 21:12:40,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:40,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496501732] [2023-12-05 21:12:40,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496501732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:40,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:40,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-12-05 21:12:40,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932293738] [2023-12-05 21:12:40,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:40,851 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-05 21:12:40,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-05 21:12:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2023-12-05 21:12:40,852 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 167 [2023-12-05 21:12:40,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 332 transitions, 7745 flow. Second operand has 25 states, 25 states have (on average 51.4) internal successors, (1285), 25 states have internal predecessors, (1285), 0 states have call successors, (0), 0 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 21:12:40,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:40,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 167 [2023-12-05 21:12:40,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:42,306 INFO L124 PetriNetUnfolderBase]: 345/1194 cut-off events. [2023-12-05 21:12:42,306 INFO L125 PetriNetUnfolderBase]: For 32862/32984 co-relation queries the response was YES. [2023-12-05 21:12:42,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11639 conditions, 1194 events. 345/1194 cut-off events. For 32862/32984 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7708 event pairs, 3 based on Foata normal form. 63/1255 useless extension candidates. Maximal degree in co-relation 10857. Up to 610 conditions per place. [2023-12-05 21:12:42,316 INFO L140 encePairwiseOnDemand]: 125/167 looper letters, 214 selfloop transitions, 104 changer transitions 29/396 dead transitions. [2023-12-05 21:12:42,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 396 transitions, 10057 flow [2023-12-05 21:12:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-05 21:12:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-12-05 21:12:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2567 transitions. [2023-12-05 21:12:42,323 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3270480315963817 [2023-12-05 21:12:42,323 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2567 transitions. [2023-12-05 21:12:42,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2567 transitions. [2023-12-05 21:12:42,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:42,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2567 transitions. [2023-12-05 21:12:42,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 54.61702127659574) internal successors, (2567), 47 states have internal predecessors, (2567), 0 states have call successors, (0), 0 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 21:12:42,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 167.0) internal successors, (8016), 48 states have internal predecessors, (8016), 0 states have call successors, (0), 0 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 21:12:42,333 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 167.0) internal successors, (8016), 48 states have internal predecessors, (8016), 0 states have call successors, (0), 0 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 21:12:42,334 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 195 predicate places. [2023-12-05 21:12:42,334 INFO L500 AbstractCegarLoop]: Abstraction has has 365 places, 396 transitions, 10057 flow [2023-12-05 21:12:42,334 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 51.4) internal successors, (1285), 25 states have internal predecessors, (1285), 0 states have call successors, (0), 0 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 21:12:42,334 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:42,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:42,334 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-05 21:12:42,334 INFO L425 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:42,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2035703610, now seen corresponding path program 1 times [2023-12-05 21:12:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:42,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608678494] [2023-12-05 21:12:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:43,295 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 21:12:43,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:43,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608678494] [2023-12-05 21:12:43,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608678494] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:43,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:43,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-12-05 21:12:43,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169167181] [2023-12-05 21:12:43,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:43,296 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-05 21:12:43,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-05 21:12:43,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-12-05 21:12:43,298 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 167 [2023-12-05 21:12:43,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 396 transitions, 10057 flow. Second operand has 24 states, 24 states have (on average 50.541666666666664) internal successors, (1213), 24 states have internal predecessors, (1213), 0 states have call successors, (0), 0 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 21:12:43,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:43,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 167 [2023-12-05 21:12:43,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:45,003 INFO L124 PetriNetUnfolderBase]: 289/1054 cut-off events. [2023-12-05 21:12:45,004 INFO L125 PetriNetUnfolderBase]: For 32030/32137 co-relation queries the response was YES. [2023-12-05 21:12:45,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11013 conditions, 1054 events. 289/1054 cut-off events. For 32030/32137 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6568 event pairs, 5 based on Foata normal form. 73/1125 useless extension candidates. Maximal degree in co-relation 10178. Up to 504 conditions per place. [2023-12-05 21:12:45,012 INFO L140 encePairwiseOnDemand]: 126/167 looper letters, 189 selfloop transitions, 107 changer transitions 49/393 dead transitions. [2023-12-05 21:12:45,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 393 transitions, 10783 flow [2023-12-05 21:12:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-05 21:12:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-12-05 21:12:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2552 transitions. [2023-12-05 21:12:45,015 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3183632734530938 [2023-12-05 21:12:45,015 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2552 transitions. [2023-12-05 21:12:45,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2552 transitions. [2023-12-05 21:12:45,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:45,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2552 transitions. [2023-12-05 21:12:45,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 53.166666666666664) internal successors, (2552), 48 states have internal predecessors, (2552), 0 states have call successors, (0), 0 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 21:12:45,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 167.0) internal successors, (8183), 49 states have internal predecessors, (8183), 0 states have call successors, (0), 0 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 21:12:45,025 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 167.0) internal successors, (8183), 49 states have internal predecessors, (8183), 0 states have call successors, (0), 0 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 21:12:45,025 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 240 predicate places. [2023-12-05 21:12:45,025 INFO L500 AbstractCegarLoop]: Abstraction has has 410 places, 393 transitions, 10783 flow [2023-12-05 21:12:45,026 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 50.541666666666664) internal successors, (1213), 24 states have internal predecessors, (1213), 0 states have call successors, (0), 0 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 21:12:45,026 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:45,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:45,026 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-05 21:12:45,026 INFO L425 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:45,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash 913470216, now seen corresponding path program 1 times [2023-12-05 21:12:45,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:45,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305548569] [2023-12-05 21:12:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:45,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:45,300 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 21:12:45,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:45,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305548569] [2023-12-05 21:12:45,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305548569] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:45,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:45,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-05 21:12:45,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116913655] [2023-12-05 21:12:45,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:45,301 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-05 21:12:45,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:45,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-05 21:12:45,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:12:45,303 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 167 [2023-12-05 21:12:45,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 393 transitions, 10783 flow. Second operand has 11 states, 11 states have (on average 89.63636363636364) internal successors, (986), 11 states have internal predecessors, (986), 0 states have call successors, (0), 0 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 21:12:45,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:45,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 167 [2023-12-05 21:12:45,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:45,950 INFO L124 PetriNetUnfolderBase]: 378/1315 cut-off events. [2023-12-05 21:12:45,950 INFO L125 PetriNetUnfolderBase]: For 45533/45720 co-relation queries the response was YES. [2023-12-05 21:12:45,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14277 conditions, 1315 events. 378/1315 cut-off events. For 45533/45720 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8801 event pairs, 2 based on Foata normal form. 30/1343 useless extension candidates. Maximal degree in co-relation 13411. Up to 618 conditions per place. [2023-12-05 21:12:45,960 INFO L140 encePairwiseOnDemand]: 151/167 looper letters, 264 selfloop transitions, 63 changer transitions 85/508 dead transitions. [2023-12-05 21:12:45,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 508 transitions, 15285 flow [2023-12-05 21:12:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-05 21:12:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-12-05 21:12:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1685 transitions. [2023-12-05 21:12:45,962 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5605455755156354 [2023-12-05 21:12:45,962 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1685 transitions. [2023-12-05 21:12:45,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1685 transitions. [2023-12-05 21:12:45,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:45,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1685 transitions. [2023-12-05 21:12:45,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 93.61111111111111) internal successors, (1685), 18 states have internal predecessors, (1685), 0 states have call successors, (0), 0 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 21:12:45,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 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 21:12:45,967 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 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 21:12:45,968 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 257 predicate places. [2023-12-05 21:12:45,968 INFO L500 AbstractCegarLoop]: Abstraction has has 427 places, 508 transitions, 15285 flow [2023-12-05 21:12:45,969 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 89.63636363636364) internal successors, (986), 11 states have internal predecessors, (986), 0 states have call successors, (0), 0 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 21:12:45,969 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:45,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:45,969 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-05 21:12:45,969 INFO L425 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:45,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash 913470215, now seen corresponding path program 1 times [2023-12-05 21:12:45,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:45,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936934951] [2023-12-05 21:12:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:46,184 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 21:12:46,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:46,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936934951] [2023-12-05 21:12:46,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936934951] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:46,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:46,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-05 21:12:46,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63813164] [2023-12-05 21:12:46,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:46,187 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-05 21:12:46,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-05 21:12:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-12-05 21:12:46,188 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 167 [2023-12-05 21:12:46,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 508 transitions, 15285 flow. Second operand has 13 states, 13 states have (on average 65.38461538461539) internal successors, (850), 13 states have internal predecessors, (850), 0 states have call successors, (0), 0 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 21:12:46,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:46,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 167 [2023-12-05 21:12:46,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:46,719 INFO L124 PetriNetUnfolderBase]: 366/1282 cut-off events. [2023-12-05 21:12:46,719 INFO L125 PetriNetUnfolderBase]: For 49521/49718 co-relation queries the response was YES. [2023-12-05 21:12:46,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14677 conditions, 1282 events. 366/1282 cut-off events. For 49521/49718 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8477 event pairs, 2 based on Foata normal form. 27/1307 useless extension candidates. Maximal degree in co-relation 13763. Up to 595 conditions per place. [2023-12-05 21:12:46,729 INFO L140 encePairwiseOnDemand]: 147/167 looper letters, 277 selfloop transitions, 63 changer transitions 93/497 dead transitions. [2023-12-05 21:12:46,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 497 transitions, 15775 flow [2023-12-05 21:12:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-05 21:12:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-12-05 21:12:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1048 transitions. [2023-12-05 21:12:46,731 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4183632734530938 [2023-12-05 21:12:46,731 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1048 transitions. [2023-12-05 21:12:46,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1048 transitions. [2023-12-05 21:12:46,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:46,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1048 transitions. [2023-12-05 21:12:46,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 69.86666666666666) internal successors, (1048), 15 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:12:46,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 167.0) internal successors, (2672), 16 states have internal predecessors, (2672), 0 states have call successors, (0), 0 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 21:12:46,734 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 167.0) internal successors, (2672), 16 states have internal predecessors, (2672), 0 states have call successors, (0), 0 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 21:12:46,735 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 269 predicate places. [2023-12-05 21:12:46,735 INFO L500 AbstractCegarLoop]: Abstraction has has 439 places, 497 transitions, 15775 flow [2023-12-05 21:12:46,735 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 65.38461538461539) internal successors, (850), 13 states have internal predecessors, (850), 0 states have call successors, (0), 0 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 21:12:46,735 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:46,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:46,735 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-05 21:12:46,735 INFO L425 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:46,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:46,736 INFO L85 PathProgramCache]: Analyzing trace with hash 385767655, now seen corresponding path program 1 times [2023-12-05 21:12:46,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:46,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204839434] [2023-12-05 21:12:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:47,444 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 21:12:47,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:47,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204839434] [2023-12-05 21:12:47,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204839434] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:47,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:47,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-12-05 21:12:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121573079] [2023-12-05 21:12:47,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:47,445 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-05 21:12:47,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:47,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-05 21:12:47,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-12-05 21:12:47,446 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 167 [2023-12-05 21:12:47,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 497 transitions, 15775 flow. Second operand has 26 states, 26 states have (on average 52.42307692307692) internal successors, (1363), 26 states have internal predecessors, (1363), 0 states have call successors, (0), 0 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 21:12:47,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:47,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 167 [2023-12-05 21:12:47,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:48,672 INFO L124 PetriNetUnfolderBase]: 385/1390 cut-off events. [2023-12-05 21:12:48,672 INFO L125 PetriNetUnfolderBase]: For 57788/58039 co-relation queries the response was YES. [2023-12-05 21:12:48,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16426 conditions, 1390 events. 385/1390 cut-off events. For 57788/58039 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9590 event pairs, 7 based on Foata normal form. 27/1415 useless extension candidates. Maximal degree in co-relation 15459. Up to 627 conditions per place. [2023-12-05 21:12:48,683 INFO L140 encePairwiseOnDemand]: 126/167 looper letters, 276 selfloop transitions, 124 changer transitions 101/553 dead transitions. [2023-12-05 21:12:48,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 553 transitions, 18735 flow [2023-12-05 21:12:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-05 21:12:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-12-05 21:12:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2093 transitions. [2023-12-05 21:12:48,686 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32981405609832964 [2023-12-05 21:12:48,686 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2093 transitions. [2023-12-05 21:12:48,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2093 transitions. [2023-12-05 21:12:48,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:48,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2093 transitions. [2023-12-05 21:12:48,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.078947368421055) internal successors, (2093), 38 states have internal predecessors, (2093), 0 states have call successors, (0), 0 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 21:12:48,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 167.0) internal successors, (6513), 39 states have internal predecessors, (6513), 0 states have call successors, (0), 0 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 21:12:48,693 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 167.0) internal successors, (6513), 39 states have internal predecessors, (6513), 0 states have call successors, (0), 0 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 21:12:48,694 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 306 predicate places. [2023-12-05 21:12:48,694 INFO L500 AbstractCegarLoop]: Abstraction has has 476 places, 553 transitions, 18735 flow [2023-12-05 21:12:48,694 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.42307692307692) internal successors, (1363), 26 states have internal predecessors, (1363), 0 states have call successors, (0), 0 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 21:12:48,694 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:48,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:48,694 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-05 21:12:48,694 INFO L425 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:48,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:48,695 INFO L85 PathProgramCache]: Analyzing trace with hash 385767656, now seen corresponding path program 1 times [2023-12-05 21:12:48,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:48,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231727118] [2023-12-05 21:12:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:48,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:49,577 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 21:12:49,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:49,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231727118] [2023-12-05 21:12:49,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231727118] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:49,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:49,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-12-05 21:12:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983705928] [2023-12-05 21:12:49,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:49,578 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-05 21:12:49,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-05 21:12:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-12-05 21:12:49,579 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 167 [2023-12-05 21:12:49,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 553 transitions, 18735 flow. Second operand has 24 states, 24 states have (on average 50.625) internal successors, (1215), 24 states have internal predecessors, (1215), 0 states have call successors, (0), 0 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 21:12:49,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:49,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 167 [2023-12-05 21:12:49,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:51,153 INFO L124 PetriNetUnfolderBase]: 387/1418 cut-off events. [2023-12-05 21:12:51,153 INFO L125 PetriNetUnfolderBase]: For 65457/65684 co-relation queries the response was YES. [2023-12-05 21:12:51,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17434 conditions, 1418 events. 387/1418 cut-off events. For 65457/65684 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9906 event pairs, 5 based on Foata normal form. 17/1433 useless extension candidates. Maximal degree in co-relation 16414. Up to 631 conditions per place. [2023-12-05 21:12:51,162 INFO L140 encePairwiseOnDemand]: 133/167 looper letters, 325 selfloop transitions, 93 changer transitions 102/572 dead transitions. [2023-12-05 21:12:51,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 572 transitions, 20511 flow [2023-12-05 21:12:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-05 21:12:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-12-05 21:12:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2065 transitions. [2023-12-05 21:12:51,166 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3170581913096883 [2023-12-05 21:12:51,166 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2065 transitions. [2023-12-05 21:12:51,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2065 transitions. [2023-12-05 21:12:51,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:51,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2065 transitions. [2023-12-05 21:12:51,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 52.94871794871795) internal successors, (2065), 39 states have internal predecessors, (2065), 0 states have call successors, (0), 0 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 21:12:51,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 167.0) internal successors, (6680), 40 states have internal predecessors, (6680), 0 states have call successors, (0), 0 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 21:12:51,173 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 167.0) internal successors, (6680), 40 states have internal predecessors, (6680), 0 states have call successors, (0), 0 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 21:12:51,174 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 344 predicate places. [2023-12-05 21:12:51,174 INFO L500 AbstractCegarLoop]: Abstraction has has 514 places, 572 transitions, 20511 flow [2023-12-05 21:12:51,174 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 50.625) internal successors, (1215), 24 states have internal predecessors, (1215), 0 states have call successors, (0), 0 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 21:12:51,174 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:51,174 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:51,174 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-05 21:12:51,174 INFO L425 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:51,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:51,174 INFO L85 PathProgramCache]: Analyzing trace with hash -503356255, now seen corresponding path program 1 times [2023-12-05 21:12:51,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:51,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020078583] [2023-12-05 21:12:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:51,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:52,151 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 21:12:52,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:52,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020078583] [2023-12-05 21:12:52,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020078583] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:52,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:52,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-12-05 21:12:52,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837888339] [2023-12-05 21:12:52,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:52,153 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:12:52,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:12:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:12:52,154 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 167 [2023-12-05 21:12:52,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 572 transitions, 20511 flow. Second operand has 23 states, 23 states have (on average 50.869565217391305) internal successors, (1170), 23 states have internal predecessors, (1170), 0 states have call successors, (0), 0 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 21:12:52,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:52,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 167 [2023-12-05 21:12:52,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:54,416 INFO L124 PetriNetUnfolderBase]: 399/1478 cut-off events. [2023-12-05 21:12:54,417 INFO L125 PetriNetUnfolderBase]: For 74359/74644 co-relation queries the response was YES. [2023-12-05 21:12:54,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18829 conditions, 1478 events. 399/1478 cut-off events. For 74359/74644 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10556 event pairs, 6 based on Foata normal form. 33/1509 useless extension candidates. Maximal degree in co-relation 17756. Up to 647 conditions per place. [2023-12-05 21:12:54,429 INFO L140 encePairwiseOnDemand]: 130/167 looper letters, 285 selfloop transitions, 176 changer transitions 122/636 dead transitions. [2023-12-05 21:12:54,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 636 transitions, 23859 flow [2023-12-05 21:12:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-05 21:12:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-12-05 21:12:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3386 transitions. [2023-12-05 21:12:54,433 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3119299861814832 [2023-12-05 21:12:54,433 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3386 transitions. [2023-12-05 21:12:54,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3386 transitions. [2023-12-05 21:12:54,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:54,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3386 transitions. [2023-12-05 21:12:54,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 52.09230769230769) internal successors, (3386), 65 states have internal predecessors, (3386), 0 states have call successors, (0), 0 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 21:12:54,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 167.0) internal successors, (11022), 66 states have internal predecessors, (11022), 0 states have call successors, (0), 0 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 21:12:54,445 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 167.0) internal successors, (11022), 66 states have internal predecessors, (11022), 0 states have call successors, (0), 0 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 21:12:54,446 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 408 predicate places. [2023-12-05 21:12:54,446 INFO L500 AbstractCegarLoop]: Abstraction has has 578 places, 636 transitions, 23859 flow [2023-12-05 21:12:54,446 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 50.869565217391305) internal successors, (1170), 23 states have internal predecessors, (1170), 0 states have call successors, (0), 0 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 21:12:54,446 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:54,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:54,446 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-05 21:12:54,447 INFO L425 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:54,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash -503356256, now seen corresponding path program 1 times [2023-12-05 21:12:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:54,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631696659] [2023-12-05 21:12:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:54,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:55,311 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 21:12:55,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:55,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631696659] [2023-12-05 21:12:55,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631696659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:55,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:55,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-12-05 21:12:55,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395975567] [2023-12-05 21:12:55,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:55,312 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-05 21:12:55,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-05 21:12:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2023-12-05 21:12:55,313 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 167 [2023-12-05 21:12:55,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 636 transitions, 23859 flow. Second operand has 28 states, 28 states have (on average 53.32142857142857) internal successors, (1493), 28 states have internal predecessors, (1493), 0 states have call successors, (0), 0 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 21:12:55,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:55,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 167 [2023-12-05 21:12:55,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:56,921 INFO L124 PetriNetUnfolderBase]: 415/1535 cut-off events. [2023-12-05 21:12:56,921 INFO L125 PetriNetUnfolderBase]: For 84900/85235 co-relation queries the response was YES. [2023-12-05 21:12:56,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20379 conditions, 1535 events. 415/1535 cut-off events. For 84900/85235 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 11134 event pairs, 4 based on Foata normal form. 30/1563 useless extension candidates. Maximal degree in co-relation 19254. Up to 665 conditions per place. [2023-12-05 21:12:56,933 INFO L140 encePairwiseOnDemand]: 124/167 looper letters, 331 selfloop transitions, 120 changer transitions 148/653 dead transitions. [2023-12-05 21:12:56,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 653 transitions, 25757 flow [2023-12-05 21:12:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-05 21:12:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-12-05 21:12:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2448 transitions. [2023-12-05 21:12:56,935 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3331518780620577 [2023-12-05 21:12:56,935 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2448 transitions. [2023-12-05 21:12:56,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2448 transitions. [2023-12-05 21:12:56,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:56,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2448 transitions. [2023-12-05 21:12:56,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.63636363636363) internal successors, (2448), 44 states have internal predecessors, (2448), 0 states have call successors, (0), 0 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 21:12:56,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 167.0) internal successors, (7515), 45 states have internal predecessors, (7515), 0 states have call successors, (0), 0 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 21:12:56,943 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 167.0) internal successors, (7515), 45 states have internal predecessors, (7515), 0 states have call successors, (0), 0 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 21:12:56,943 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 451 predicate places. [2023-12-05 21:12:56,943 INFO L500 AbstractCegarLoop]: Abstraction has has 621 places, 653 transitions, 25757 flow [2023-12-05 21:12:56,943 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 53.32142857142857) internal successors, (1493), 28 states have internal predecessors, (1493), 0 states have call successors, (0), 0 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 21:12:56,943 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:56,943 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:56,944 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-05 21:12:56,944 INFO L425 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:12:56,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1097665015, now seen corresponding path program 1 times [2023-12-05 21:12:56,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:56,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700424455] [2023-12-05 21:12:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:58,043 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 21:12:58,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700424455] [2023-12-05 21:12:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700424455] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:58,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:58,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-12-05 21:12:58,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185120356] [2023-12-05 21:12:58,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:58,044 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-05 21:12:58,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:58,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-05 21:12:58,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2023-12-05 21:12:58,046 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 167 [2023-12-05 21:12:58,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 653 transitions, 25757 flow. Second operand has 26 states, 26 states have (on average 49.57692307692308) internal successors, (1289), 26 states have internal predecessors, (1289), 0 states have call successors, (0), 0 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 21:12:58,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:58,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 167 [2023-12-05 21:12:58,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:00,552 INFO L124 PetriNetUnfolderBase]: 416/1567 cut-off events. [2023-12-05 21:13:00,552 INFO L125 PetriNetUnfolderBase]: For 90010/90251 co-relation queries the response was YES. [2023-12-05 21:13:00,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21473 conditions, 1567 events. 416/1567 cut-off events. For 90010/90251 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11332 event pairs, 0 based on Foata normal form. 16/1582 useless extension candidates. Maximal degree in co-relation 20295. Up to 668 conditions per place. [2023-12-05 21:13:00,564 INFO L140 encePairwiseOnDemand]: 126/167 looper letters, 286 selfloop transitions, 170 changer transitions 162/671 dead transitions. [2023-12-05 21:13:00,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 671 transitions, 27411 flow [2023-12-05 21:13:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-12-05 21:13:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-12-05 21:13:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 2962 transitions. [2023-12-05 21:13:00,568 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3058021887259963 [2023-12-05 21:13:00,568 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 2962 transitions. [2023-12-05 21:13:00,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 2962 transitions. [2023-12-05 21:13:00,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:00,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 2962 transitions. [2023-12-05 21:13:00,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 51.06896551724138) internal successors, (2962), 58 states have internal predecessors, (2962), 0 states have call successors, (0), 0 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 21:13:00,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 167.0) internal successors, (9853), 59 states have internal predecessors, (9853), 0 states have call successors, (0), 0 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 21:13:00,577 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 167.0) internal successors, (9853), 59 states have internal predecessors, (9853), 0 states have call successors, (0), 0 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 21:13:00,577 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 507 predicate places. [2023-12-05 21:13:00,577 INFO L500 AbstractCegarLoop]: Abstraction has has 677 places, 671 transitions, 27411 flow [2023-12-05 21:13:00,578 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 49.57692307692308) internal successors, (1289), 26 states have internal predecessors, (1289), 0 states have call successors, (0), 0 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 21:13:00,578 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:00,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:00,578 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-05 21:13:00,578 INFO L425 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:00,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1097665014, now seen corresponding path program 1 times [2023-12-05 21:13:00,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:00,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797810105] [2023-12-05 21:13:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:00,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:01,863 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 21:13:01,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:01,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797810105] [2023-12-05 21:13:01,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797810105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:01,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:01,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-12-05 21:13:01,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140223610] [2023-12-05 21:13:01,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:01,864 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-05 21:13:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-05 21:13:01,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2023-12-05 21:13:01,865 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 167 [2023-12-05 21:13:01,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 671 transitions, 27411 flow. Second operand has 27 states, 27 states have (on average 49.48148148148148) internal successors, (1336), 27 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:13:01,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:01,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 167 [2023-12-05 21:13:01,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:04,697 INFO L124 PetriNetUnfolderBase]: 414/1560 cut-off events. [2023-12-05 21:13:04,697 INFO L125 PetriNetUnfolderBase]: For 96896/97179 co-relation queries the response was YES. [2023-12-05 21:13:04,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22353 conditions, 1560 events. 414/1560 cut-off events. For 96896/97179 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 11295 event pairs, 1 based on Foata normal form. 16/1575 useless extension candidates. Maximal degree in co-relation 21122. Up to 663 conditions per place. [2023-12-05 21:13:04,710 INFO L140 encePairwiseOnDemand]: 124/167 looper letters, 290 selfloop transitions, 164 changer transitions 164/671 dead transitions. [2023-12-05 21:13:04,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 671 transitions, 28611 flow [2023-12-05 21:13:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-05 21:13:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-12-05 21:13:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3346 transitions. [2023-12-05 21:13:04,714 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3035746688441299 [2023-12-05 21:13:04,714 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3346 transitions. [2023-12-05 21:13:04,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3346 transitions. [2023-12-05 21:13:04,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:04,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3346 transitions. [2023-12-05 21:13:04,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 50.696969696969695) internal successors, (3346), 66 states have internal predecessors, (3346), 0 states have call successors, (0), 0 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 21:13:04,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 167.0) internal successors, (11189), 67 states have internal predecessors, (11189), 0 states have call successors, (0), 0 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 21:13:04,729 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 167.0) internal successors, (11189), 67 states have internal predecessors, (11189), 0 states have call successors, (0), 0 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 21:13:04,729 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 571 predicate places. [2023-12-05 21:13:04,729 INFO L500 AbstractCegarLoop]: Abstraction has has 741 places, 671 transitions, 28611 flow [2023-12-05 21:13:04,729 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 49.48148148148148) internal successors, (1336), 27 states have internal predecessors, (1336), 0 states have call successors, (0), 0 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 21:13:04,729 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:04,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:04,729 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-05 21:13:04,730 INFO L425 AbstractCegarLoop]: === Iteration 26 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:04,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:04,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1077398230, now seen corresponding path program 1 times [2023-12-05 21:13:04,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:04,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814348557] [2023-12-05 21:13:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:04,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:05,366 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 21:13:05,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:05,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814348557] [2023-12-05 21:13:05,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814348557] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:05,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:05,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-12-05 21:13:05,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276561674] [2023-12-05 21:13:05,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:05,367 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-05 21:13:05,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:05,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-05 21:13:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-12-05 21:13:05,369 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 167 [2023-12-05 21:13:05,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 741 places, 671 transitions, 28611 flow. Second operand has 25 states, 25 states have (on average 52.68) internal successors, (1317), 25 states have internal predecessors, (1317), 0 states have call successors, (0), 0 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 21:13:05,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:05,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 167 [2023-12-05 21:13:05,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:06,709 INFO L124 PetriNetUnfolderBase]: 406/1533 cut-off events. [2023-12-05 21:13:06,709 INFO L125 PetriNetUnfolderBase]: For 102988/103271 co-relation queries the response was YES. [2023-12-05 21:13:06,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22928 conditions, 1533 events. 406/1533 cut-off events. For 102988/103271 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11005 event pairs, 0 based on Foata normal form. 22/1554 useless extension candidates. Maximal degree in co-relation 21644. Up to 665 conditions per place. [2023-12-05 21:13:06,722 INFO L140 encePairwiseOnDemand]: 127/167 looper letters, 347 selfloop transitions, 95 changer transitions 164/667 dead transitions. [2023-12-05 21:13:06,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 667 transitions, 29673 flow [2023-12-05 21:13:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-05 21:13:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-12-05 21:13:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1953 transitions. [2023-12-05 21:13:06,724 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3248502994011976 [2023-12-05 21:13:06,724 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1953 transitions. [2023-12-05 21:13:06,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1953 transitions. [2023-12-05 21:13:06,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:06,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1953 transitions. [2023-12-05 21:13:06,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 54.25) internal successors, (1953), 36 states have internal predecessors, (1953), 0 states have call successors, (0), 0 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 21:13:06,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 167.0) internal successors, (6179), 37 states have internal predecessors, (6179), 0 states have call successors, (0), 0 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 21:13:06,729 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 167.0) internal successors, (6179), 37 states have internal predecessors, (6179), 0 states have call successors, (0), 0 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 21:13:06,730 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 605 predicate places. [2023-12-05 21:13:06,730 INFO L500 AbstractCegarLoop]: Abstraction has has 775 places, 667 transitions, 29673 flow [2023-12-05 21:13:06,730 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.68) internal successors, (1317), 25 states have internal predecessors, (1317), 0 states have call successors, (0), 0 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 21:13:06,730 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:06,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:06,730 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-05 21:13:06,730 INFO L425 AbstractCegarLoop]: === Iteration 27 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:06,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:06,730 INFO L85 PathProgramCache]: Analyzing trace with hash -22244813, now seen corresponding path program 1 times [2023-12-05 21:13:06,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:06,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117779994] [2023-12-05 21:13:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:06,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:06,825 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 21:13:06,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:06,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117779994] [2023-12-05 21:13:06,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117779994] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:06,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:06,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:13:06,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402588094] [2023-12-05 21:13:06,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:06,827 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:13:06,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:06,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:13:06,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:13:06,828 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 167 [2023-12-05 21:13:06,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 667 transitions, 29673 flow. Second operand has 7 states, 7 states have (on average 100.42857142857143) internal successors, (703), 7 states have internal predecessors, (703), 0 states have call successors, (0), 0 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 21:13:06,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:06,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 167 [2023-12-05 21:13:06,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:07,294 INFO L124 PetriNetUnfolderBase]: 404/1531 cut-off events. [2023-12-05 21:13:07,294 INFO L125 PetriNetUnfolderBase]: For 110364/110643 co-relation queries the response was YES. [2023-12-05 21:13:07,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23575 conditions, 1531 events. 404/1531 cut-off events. For 110364/110643 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 10973 event pairs, 0 based on Foata normal form. 4/1534 useless extension candidates. Maximal degree in co-relation 22264. Up to 663 conditions per place. [2023-12-05 21:13:07,309 INFO L140 encePairwiseOnDemand]: 160/167 looper letters, 350 selfloop transitions, 18 changer transitions 164/665 dead transitions. [2023-12-05 21:13:07,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 665 transitions, 30617 flow [2023-12-05 21:13:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:13:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:13:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 825 transitions. [2023-12-05 21:13:07,310 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6175149700598802 [2023-12-05 21:13:07,310 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 825 transitions. [2023-12-05 21:13:07,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 825 transitions. [2023-12-05 21:13:07,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:07,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 825 transitions. [2023-12-05 21:13:07,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 103.125) internal successors, (825), 8 states have internal predecessors, (825), 0 states have call successors, (0), 0 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 21:13:07,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 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 21:13:07,312 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 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 21:13:07,312 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 611 predicate places. [2023-12-05 21:13:07,312 INFO L500 AbstractCegarLoop]: Abstraction has has 781 places, 665 transitions, 30617 flow [2023-12-05 21:13:07,313 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.42857142857143) internal successors, (703), 7 states have internal predecessors, (703), 0 states have call successors, (0), 0 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 21:13:07,313 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:07,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:07,313 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-05 21:13:07,313 INFO L425 AbstractCegarLoop]: === Iteration 28 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:07,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash -689588857, now seen corresponding path program 1 times [2023-12-05 21:13:07,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:07,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903054141] [2023-12-05 21:13:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:07,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:07,949 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 21:13:07,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903054141] [2023-12-05 21:13:07,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903054141] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:07,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:07,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-12-05 21:13:07,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143444073] [2023-12-05 21:13:07,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:07,950 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-05 21:13:07,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-05 21:13:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-12-05 21:13:07,952 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 167 [2023-12-05 21:13:07,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 665 transitions, 30617 flow. Second operand has 25 states, 25 states have (on average 53.68) internal successors, (1342), 25 states have internal predecessors, (1342), 0 states have call successors, (0), 0 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 21:13:07,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:07,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 167 [2023-12-05 21:13:07,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:09,264 INFO L124 PetriNetUnfolderBase]: 402/1521 cut-off events. [2023-12-05 21:13:09,264 INFO L125 PetriNetUnfolderBase]: For 120910/121235 co-relation queries the response was YES. [2023-12-05 21:13:09,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24332 conditions, 1521 events. 402/1521 cut-off events. For 120910/121235 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 10888 event pairs, 0 based on Foata normal form. 6/1526 useless extension candidates. Maximal degree in co-relation 22969. Up to 661 conditions per place. [2023-12-05 21:13:09,279 INFO L140 encePairwiseOnDemand]: 127/167 looper letters, 346 selfloop transitions, 93 changer transitions 164/665 dead transitions. [2023-12-05 21:13:09,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 819 places, 665 transitions, 31791 flow [2023-12-05 21:13:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-05 21:13:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-12-05 21:13:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2183 transitions. [2023-12-05 21:13:09,281 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.32679640718562875 [2023-12-05 21:13:09,281 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2183 transitions. [2023-12-05 21:13:09,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2183 transitions. [2023-12-05 21:13:09,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:09,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2183 transitions. [2023-12-05 21:13:09,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 54.575) internal successors, (2183), 40 states have internal predecessors, (2183), 0 states have call successors, (0), 0 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 21:13:09,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 167.0) internal successors, (6847), 41 states have internal predecessors, (6847), 0 states have call successors, (0), 0 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 21:13:09,287 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 167.0) internal successors, (6847), 41 states have internal predecessors, (6847), 0 states have call successors, (0), 0 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 21:13:09,288 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 649 predicate places. [2023-12-05 21:13:09,288 INFO L500 AbstractCegarLoop]: Abstraction has has 819 places, 665 transitions, 31791 flow [2023-12-05 21:13:09,288 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.68) internal successors, (1342), 25 states have internal predecessors, (1342), 0 states have call successors, (0), 0 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 21:13:09,288 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:09,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:09,288 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-05 21:13:09,288 INFO L425 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:09,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash -332817339, now seen corresponding path program 1 times [2023-12-05 21:13:09,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:09,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036021953] [2023-12-05 21:13:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:09,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:09,410 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 21:13:09,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:09,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036021953] [2023-12-05 21:13:09,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036021953] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:09,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:09,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:13:09,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608246622] [2023-12-05 21:13:09,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:09,412 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:13:09,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:09,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:13:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:13:09,414 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 167 [2023-12-05 21:13:09,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 665 transitions, 31791 flow. Second operand has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 0 states have call successors, (0), 0 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 21:13:09,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:09,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 167 [2023-12-05 21:13:09,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:09,754 INFO L124 PetriNetUnfolderBase]: 279/1166 cut-off events. [2023-12-05 21:13:09,754 INFO L125 PetriNetUnfolderBase]: For 97550/97861 co-relation queries the response was YES. [2023-12-05 21:13:09,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18907 conditions, 1166 events. 279/1166 cut-off events. For 97550/97861 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7499 event pairs, 0 based on Foata normal form. 27/1189 useless extension candidates. Maximal degree in co-relation 17530. Up to 474 conditions per place. [2023-12-05 21:13:09,764 INFO L140 encePairwiseOnDemand]: 161/167 looper letters, 76 selfloop transitions, 63 changer transitions 116/569 dead transitions. [2023-12-05 21:13:09,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 569 transitions, 27083 flow [2023-12-05 21:13:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:13:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:13:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 757 transitions. [2023-12-05 21:13:09,765 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9065868263473054 [2023-12-05 21:13:09,765 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 757 transitions. [2023-12-05 21:13:09,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 757 transitions. [2023-12-05 21:13:09,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:09,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 757 transitions. [2023-12-05 21:13:09,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.4) internal successors, (757), 5 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 21:13:09,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 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 21:13:09,766 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 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 21:13:09,767 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 646 predicate places. [2023-12-05 21:13:09,767 INFO L500 AbstractCegarLoop]: Abstraction has has 816 places, 569 transitions, 27083 flow [2023-12-05 21:13:09,767 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.16666666666666) internal successors, (895), 6 states have internal predecessors, (895), 0 states have call successors, (0), 0 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 21:13:09,767 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:09,767 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:09,767 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-05 21:13:09,767 INFO L425 AbstractCegarLoop]: === Iteration 30 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:09,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1454493198, now seen corresponding path program 1 times [2023-12-05 21:13:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:09,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363732065] [2023-12-05 21:13:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:09,863 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 21:13:09,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:09,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363732065] [2023-12-05 21:13:09,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363732065] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:09,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:09,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:13:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19582974] [2023-12-05 21:13:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:09,864 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:13:09,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:09,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:13:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:13:09,865 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 167 [2023-12-05 21:13:09,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 816 places, 569 transitions, 27083 flow. Second operand has 7 states, 7 states have (on average 101.14285714285714) internal successors, (708), 7 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 21:13:09,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:09,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 167 [2023-12-05 21:13:09,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:10,220 INFO L124 PetriNetUnfolderBase]: 275/1154 cut-off events. [2023-12-05 21:13:10,220 INFO L125 PetriNetUnfolderBase]: For 99610/99937 co-relation queries the response was YES. [2023-12-05 21:13:10,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19220 conditions, 1154 events. 275/1154 cut-off events. For 99610/99937 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7384 event pairs, 0 based on Foata normal form. 7/1157 useless extension candidates. Maximal degree in co-relation 17816. Up to 470 conditions per place. [2023-12-05 21:13:10,230 INFO L140 encePairwiseOnDemand]: 160/167 looper letters, 302 selfloop transitions, 20 changer transitions 116/562 dead transitions. [2023-12-05 21:13:10,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 562 transitions, 27595 flow [2023-12-05 21:13:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:13:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:13:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 823 transitions. [2023-12-05 21:13:10,231 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6160179640718563 [2023-12-05 21:13:10,231 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 823 transitions. [2023-12-05 21:13:10,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 823 transitions. [2023-12-05 21:13:10,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:10,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 823 transitions. [2023-12-05 21:13:10,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 102.875) internal successors, (823), 8 states have internal predecessors, (823), 0 states have call successors, (0), 0 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 21:13:10,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 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 21:13:10,233 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 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 21:13:10,233 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 652 predicate places. [2023-12-05 21:13:10,233 INFO L500 AbstractCegarLoop]: Abstraction has has 822 places, 562 transitions, 27595 flow [2023-12-05 21:13:10,233 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.14285714285714) internal successors, (708), 7 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 21:13:10,233 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:10,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:10,234 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-05 21:13:10,234 INFO L425 AbstractCegarLoop]: === Iteration 31 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:10,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:10,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1454558580, now seen corresponding path program 1 times [2023-12-05 21:13:10,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:10,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685103597] [2023-12-05 21:13:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:10,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:11,265 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 21:13:11,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:11,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685103597] [2023-12-05 21:13:11,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685103597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:11,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:11,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-12-05 21:13:11,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970807931] [2023-12-05 21:13:11,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:11,266 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-05 21:13:11,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:11,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-05 21:13:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2023-12-05 21:13:11,267 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 167 [2023-12-05 21:13:11,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 562 transitions, 27595 flow. Second operand has 32 states, 32 states have (on average 50.25) internal successors, (1608), 32 states have internal predecessors, (1608), 0 states have call successors, (0), 0 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 21:13:11,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:11,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 167 [2023-12-05 21:13:11,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:13,821 INFO L124 PetriNetUnfolderBase]: 285/1227 cut-off events. [2023-12-05 21:13:13,821 INFO L125 PetriNetUnfolderBase]: For 112265/112636 co-relation queries the response was YES. [2023-12-05 21:13:13,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21010 conditions, 1227 events. 285/1227 cut-off events. For 112265/112636 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8205 event pairs, 0 based on Foata normal form. 15/1238 useless extension candidates. Maximal degree in co-relation 19554. Up to 508 conditions per place. [2023-12-05 21:13:13,831 INFO L140 encePairwiseOnDemand]: 120/167 looper letters, 198 selfloop transitions, 142 changer transitions 212/605 dead transitions. [2023-12-05 21:13:13,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 893 places, 605 transitions, 31045 flow [2023-12-05 21:13:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-12-05 21:13:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-12-05 21:13:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3700 transitions. [2023-12-05 21:13:13,835 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.30771789753825685 [2023-12-05 21:13:13,835 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3700 transitions. [2023-12-05 21:13:13,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3700 transitions. [2023-12-05 21:13:13,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:13,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3700 transitions. [2023-12-05 21:13:13,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 51.388888888888886) internal successors, (3700), 72 states have internal predecessors, (3700), 0 states have call successors, (0), 0 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 21:13:13,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 167.0) internal successors, (12191), 73 states have internal predecessors, (12191), 0 states have call successors, (0), 0 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 21:13:13,845 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 167.0) internal successors, (12191), 73 states have internal predecessors, (12191), 0 states have call successors, (0), 0 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 21:13:13,845 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 723 predicate places. [2023-12-05 21:13:13,845 INFO L500 AbstractCegarLoop]: Abstraction has has 893 places, 605 transitions, 31045 flow [2023-12-05 21:13:13,845 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 50.25) internal successors, (1608), 32 states have internal predecessors, (1608), 0 states have call successors, (0), 0 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 21:13:13,846 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:13,846 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:13,846 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-12-05 21:13:13,846 INFO L425 AbstractCegarLoop]: === Iteration 32 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:13,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:13,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1960564694, now seen corresponding path program 2 times [2023-12-05 21:13:13,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:13,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905533249] [2023-12-05 21:13:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:13,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:14,702 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 21:13:14,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:14,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905533249] [2023-12-05 21:13:14,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905533249] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:14,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:14,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-12-05 21:13:14,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178854820] [2023-12-05 21:13:14,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:14,703 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-05 21:13:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-05 21:13:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2023-12-05 21:13:14,705 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 167 [2023-12-05 21:13:14,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 605 transitions, 31045 flow. Second operand has 26 states, 26 states have (on average 49.80769230769231) internal successors, (1295), 26 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 21:13:14,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:14,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 167 [2023-12-05 21:13:14,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:16,845 INFO L124 PetriNetUnfolderBase]: 294/1246 cut-off events. [2023-12-05 21:13:16,845 INFO L125 PetriNetUnfolderBase]: For 121961/122370 co-relation queries the response was YES. [2023-12-05 21:13:16,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22340 conditions, 1246 events. 294/1246 cut-off events. For 121961/122370 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 8268 event pairs, 0 based on Foata normal form. 22/1264 useless extension candidates. Maximal degree in co-relation 20831. Up to 525 conditions per place. [2023-12-05 21:13:16,857 INFO L140 encePairwiseOnDemand]: 127/167 looper letters, 173 selfloop transitions, 87 changer transitions 322/634 dead transitions. [2023-12-05 21:13:16,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 634 transitions, 33689 flow [2023-12-05 21:13:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-12-05 21:13:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-12-05 21:13:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3199 transitions. [2023-12-05 21:13:16,860 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3040585495675316 [2023-12-05 21:13:16,860 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3199 transitions. [2023-12-05 21:13:16,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3199 transitions. [2023-12-05 21:13:16,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:16,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3199 transitions. [2023-12-05 21:13:16,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 50.77777777777778) internal successors, (3199), 63 states have internal predecessors, (3199), 0 states have call successors, (0), 0 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 21:13:16,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 167.0) internal successors, (10688), 64 states have internal predecessors, (10688), 0 states have call successors, (0), 0 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 21:13:16,870 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 167.0) internal successors, (10688), 64 states have internal predecessors, (10688), 0 states have call successors, (0), 0 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 21:13:16,871 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 784 predicate places. [2023-12-05 21:13:16,871 INFO L500 AbstractCegarLoop]: Abstraction has has 954 places, 634 transitions, 33689 flow [2023-12-05 21:13:16,871 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 49.80769230769231) internal successors, (1295), 26 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 21:13:16,871 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:16,871 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:16,872 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-12-05 21:13:16,872 INFO L425 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:16,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -776816120, now seen corresponding path program 1 times [2023-12-05 21:13:16,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:16,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238943280] [2023-12-05 21:13:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:16,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:17,877 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 21:13:17,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:17,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238943280] [2023-12-05 21:13:17,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238943280] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:17,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:17,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-12-05 21:13:17,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897308990] [2023-12-05 21:13:17,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:17,878 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-05 21:13:17,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:17,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-05 21:13:17,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2023-12-05 21:13:17,880 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 167 [2023-12-05 21:13:17,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 954 places, 634 transitions, 33689 flow. Second operand has 26 states, 26 states have (on average 49.84615384615385) internal successors, (1296), 26 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 21:13:17,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:17,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 167 [2023-12-05 21:13:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:19,433 INFO L124 PetriNetUnfolderBase]: 294/1245 cut-off events. [2023-12-05 21:13:19,434 INFO L125 PetriNetUnfolderBase]: For 131029/131456 co-relation queries the response was YES. [2023-12-05 21:13:19,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23106 conditions, 1245 events. 294/1245 cut-off events. For 131029/131456 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 8313 event pairs, 0 based on Foata normal form. 13/1254 useless extension candidates. Maximal degree in co-relation 21544. Up to 524 conditions per place. [2023-12-05 21:13:19,446 INFO L140 encePairwiseOnDemand]: 131/167 looper letters, 179 selfloop transitions, 80 changer transitions 322/633 dead transitions. [2023-12-05 21:13:19,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 990 places, 633 transitions, 34793 flow [2023-12-05 21:13:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-05 21:13:19,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-12-05 21:13:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1940 transitions. [2023-12-05 21:13:19,449 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3057043807122597 [2023-12-05 21:13:19,449 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1940 transitions. [2023-12-05 21:13:19,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1940 transitions. [2023-12-05 21:13:19,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:19,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1940 transitions. [2023-12-05 21:13:19,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 51.05263157894737) internal successors, (1940), 38 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 21:13:19,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 167.0) internal successors, (6513), 39 states have internal predecessors, (6513), 0 states have call successors, (0), 0 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 21:13:19,455 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 167.0) internal successors, (6513), 39 states have internal predecessors, (6513), 0 states have call successors, (0), 0 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 21:13:19,455 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 820 predicate places. [2023-12-05 21:13:19,455 INFO L500 AbstractCegarLoop]: Abstraction has has 990 places, 633 transitions, 34793 flow [2023-12-05 21:13:19,456 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 49.84615384615385) internal successors, (1296), 26 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 21:13:19,456 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:19,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:19,456 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-05 21:13:19,456 INFO L425 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:19,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -354649399, now seen corresponding path program 1 times [2023-12-05 21:13:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260961412] [2023-12-05 21:13:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:20,542 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 21:13:20,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:20,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260961412] [2023-12-05 21:13:20,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260961412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:20,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:20,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-12-05 21:13:20,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607042299] [2023-12-05 21:13:20,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:20,542 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-05 21:13:20,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:20,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-05 21:13:20,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2023-12-05 21:13:20,544 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 167 [2023-12-05 21:13:20,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 990 places, 633 transitions, 34793 flow. Second operand has 29 states, 29 states have (on average 49.55172413793103) internal successors, (1437), 29 states have internal predecessors, (1437), 0 states have call successors, (0), 0 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 21:13:20,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:20,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 167 [2023-12-05 21:13:20,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:22,959 INFO L124 PetriNetUnfolderBase]: 294/1246 cut-off events. [2023-12-05 21:13:22,959 INFO L125 PetriNetUnfolderBase]: For 134250/134641 co-relation queries the response was YES. [2023-12-05 21:13:22,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23874 conditions, 1246 events. 294/1246 cut-off events. For 134250/134641 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 8326 event pairs, 0 based on Foata normal form. 3/1245 useless extension candidates. Maximal degree in co-relation 22259. Up to 523 conditions per place. [2023-12-05 21:13:22,968 INFO L140 encePairwiseOnDemand]: 124/167 looper letters, 80 selfloop transitions, 77 changer transitions 447/644 dead transitions. [2023-12-05 21:13:22,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1055 places, 644 transitions, 36465 flow [2023-12-05 21:13:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-05 21:13:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-12-05 21:13:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3365 transitions. [2023-12-05 21:13:22,971 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3007417999821253 [2023-12-05 21:13:22,971 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3365 transitions. [2023-12-05 21:13:22,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3365 transitions. [2023-12-05 21:13:22,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:22,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3365 transitions. [2023-12-05 21:13:22,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 50.223880597014926) internal successors, (3365), 67 states have internal predecessors, (3365), 0 states have call successors, (0), 0 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 21:13:22,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 167.0) internal successors, (11356), 68 states have internal predecessors, (11356), 0 states have call successors, (0), 0 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 21:13:22,981 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 167.0) internal successors, (11356), 68 states have internal predecessors, (11356), 0 states have call successors, (0), 0 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 21:13:22,981 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 885 predicate places. [2023-12-05 21:13:22,981 INFO L500 AbstractCegarLoop]: Abstraction has has 1055 places, 644 transitions, 36465 flow [2023-12-05 21:13:22,981 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 49.55172413793103) internal successors, (1437), 29 states have internal predecessors, (1437), 0 states have call successors, (0), 0 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 21:13:22,981 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:22,981 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:22,981 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-05 21:13:22,981 INFO L425 AbstractCegarLoop]: === Iteration 35 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:22,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:22,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1602435293, now seen corresponding path program 1 times [2023-12-05 21:13:22,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:22,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010789496] [2023-12-05 21:13:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:22,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:24,035 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 21:13:24,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:24,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010789496] [2023-12-05 21:13:24,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010789496] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:24,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:24,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-12-05 21:13:24,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040022305] [2023-12-05 21:13:24,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:24,036 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-05 21:13:24,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-05 21:13:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-12-05 21:13:24,037 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 167 [2023-12-05 21:13:24,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1055 places, 644 transitions, 36465 flow. Second operand has 26 states, 26 states have (on average 49.84615384615385) internal successors, (1296), 26 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 21:13:24,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:24,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 167 [2023-12-05 21:13:24,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:25,756 INFO L124 PetriNetUnfolderBase]: 322/1350 cut-off events. [2023-12-05 21:13:25,756 INFO L125 PetriNetUnfolderBase]: For 160783/161216 co-relation queries the response was YES. [2023-12-05 21:13:25,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26730 conditions, 1350 events. 322/1350 cut-off events. For 160783/161216 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9314 event pairs, 0 based on Foata normal form. 8/1354 useless extension candidates. Maximal degree in co-relation 25062. Up to 571 conditions per place. [2023-12-05 21:13:25,768 INFO L140 encePairwiseOnDemand]: 129/167 looper letters, 73 selfloop transitions, 35 changer transitions 557/705 dead transitions. [2023-12-05 21:13:25,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1095 places, 705 transitions, 41459 flow [2023-12-05 21:13:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-05 21:13:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-12-05 21:13:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2094 transitions. [2023-12-05 21:13:25,770 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.30582736965094204 [2023-12-05 21:13:25,770 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2094 transitions. [2023-12-05 21:13:25,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2094 transitions. [2023-12-05 21:13:25,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:25,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2094 transitions. [2023-12-05 21:13:25,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 51.073170731707314) internal successors, (2094), 41 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:25,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 167.0) internal successors, (7014), 42 states have internal predecessors, (7014), 0 states have call successors, (0), 0 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 21:13:25,776 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 167.0) internal successors, (7014), 42 states have internal predecessors, (7014), 0 states have call successors, (0), 0 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 21:13:25,776 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 925 predicate places. [2023-12-05 21:13:25,776 INFO L500 AbstractCegarLoop]: Abstraction has has 1095 places, 705 transitions, 41459 flow [2023-12-05 21:13:25,776 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 49.84615384615385) internal successors, (1296), 26 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 21:13:25,776 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:25,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:25,777 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-12-05 21:13:25,777 INFO L425 AbstractCegarLoop]: === Iteration 36 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:13:25,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1494657473, now seen corresponding path program 2 times [2023-12-05 21:13:25,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:25,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313786512] [2023-12-05 21:13:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:25,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:26,636 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 21:13:26,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:26,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313786512] [2023-12-05 21:13:26,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313786512] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:26,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:26,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-12-05 21:13:26,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760841647] [2023-12-05 21:13:26,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:26,637 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-05 21:13:26,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-05 21:13:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2023-12-05 21:13:26,638 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 167 [2023-12-05 21:13:26,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1095 places, 705 transitions, 41459 flow. Second operand has 24 states, 24 states have (on average 51.041666666666664) internal successors, (1225), 24 states have internal predecessors, (1225), 0 states have call successors, (0), 0 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 21:13:26,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:26,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 167 [2023-12-05 21:13:26,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:28,205 INFO L124 PetriNetUnfolderBase]: 321/1340 cut-off events. [2023-12-05 21:13:28,205 INFO L125 PetriNetUnfolderBase]: For 167940/168405 co-relation queries the response was YES. [2023-12-05 21:13:28,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27472 conditions, 1340 events. 321/1340 cut-off events. For 167940/168405 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 9206 event pairs, 0 based on Foata normal form. 8/1344 useless extension candidates. Maximal degree in co-relation 25751. Up to 570 conditions per place. [2023-12-05 21:13:28,213 INFO L140 encePairwiseOnDemand]: 130/167 looper letters, 0 selfloop transitions, 0 changer transitions 703/703 dead transitions. [2023-12-05 21:13:28,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1130 places, 703 transitions, 42627 flow [2023-12-05 21:13:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-05 21:13:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-12-05 21:13:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1949 transitions. [2023-12-05 21:13:28,215 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3154232076387765 [2023-12-05 21:13:28,215 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1949 transitions. [2023-12-05 21:13:28,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1949 transitions. [2023-12-05 21:13:28,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:28,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1949 transitions. [2023-12-05 21:13:28,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 52.67567567567568) internal successors, (1949), 37 states have internal predecessors, (1949), 0 states have call successors, (0), 0 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 21:13:28,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 167.0) internal successors, (6346), 38 states have internal predecessors, (6346), 0 states have call successors, (0), 0 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 21:13:28,220 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 167.0) internal successors, (6346), 38 states have internal predecessors, (6346), 0 states have call successors, (0), 0 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 21:13:28,221 INFO L308 CegarLoopForPetriNet]: 170 programPoint places, 960 predicate places. [2023-12-05 21:13:28,221 INFO L500 AbstractCegarLoop]: Abstraction has has 1130 places, 703 transitions, 42627 flow [2023-12-05 21:13:28,221 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 51.041666666666664) internal successors, (1225), 24 states have internal predecessors, (1225), 0 states have call successors, (0), 0 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 21:13:28,227 INFO L161 wickiGriesTestDumper]: Dumping Owicki-Gries test to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/09-regions_04-list2_nr.i_BEv2_AllErrorsAtOnce [2023-12-05 21:13:28,376 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 55 remaining) [2023-12-05 21:13:28,376 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 55 remaining) [2023-12-05 21:13:28,377 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 55 remaining) [2023-12-05 21:13:28,377 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 55 remaining) [2023-12-05 21:13:28,377 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 55 remaining) [2023-12-05 21:13:28,377 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 55 remaining) [2023-12-05 21:13:28,377 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 55 remaining) [2023-12-05 21:13:28,378 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 55 remaining) [2023-12-05 21:13:28,380 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 55 remaining) [2023-12-05 21:13:28,380 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 55 remaining) [2023-12-05 21:13:28,380 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 55 remaining) [2023-12-05 21:13:28,380 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 55 remaining) [2023-12-05 21:13:28,380 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 55 remaining) [2023-12-05 21:13:28,380 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 55 remaining) [2023-12-05 21:13:28,380 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 55 remaining) [2023-12-05 21:13:28,380 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 55 remaining) [2023-12-05 21:13:28,380 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 55 remaining) [2023-12-05 21:13:28,381 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 55 remaining) [2023-12-05 21:13:28,382 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 55 remaining) [2023-12-05 21:13:28,383 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 55 remaining) [2023-12-05 21:13:28,383 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 55 remaining) [2023-12-05 21:13:28,383 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 55 remaining) [2023-12-05 21:13:28,383 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 55 remaining) [2023-12-05 21:13:28,383 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 55 remaining) [2023-12-05 21:13:28,383 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 55 remaining) [2023-12-05 21:13:28,383 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-05 21:13:28,384 INFO L457 BasicCegarLoop]: Path program histogram: [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 21:13:28,387 INFO L222 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-05 21:13:28,388 INFO L172 ceAbstractionStarter]: Computing trace abstraction results [2023-12-05 21:13:28,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:13:28 BasicIcfg [2023-12-05 21:13:28,392 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-05 21:13:28,392 INFO L158 Benchmark]: Toolchain (without parser) took 64555.94ms. Allocated memory was 335.5MB in the beginning and 1.2GB in the end (delta: 822.1MB). Free memory was 287.6MB in the beginning and 693.7MB in the end (delta: -406.2MB). Peak memory consumption was 979.0MB. Max. memory is 8.0GB. [2023-12-05 21:13:28,393 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 184.5MB. Free memory is still 133.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-05 21:13:28,393 INFO L158 Benchmark]: CACSL2BoogieTranslator took 520.89ms. Allocated memory is still 335.5MB. Free memory was 287.0MB in the beginning and 248.2MB in the end (delta: 38.8MB). Peak memory consumption was 38.8MB. Max. memory is 8.0GB. [2023-12-05 21:13:28,393 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.85ms. Allocated memory is still 335.5MB. Free memory was 248.2MB in the beginning and 245.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 21:13:28,393 INFO L158 Benchmark]: Boogie Preprocessor took 40.77ms. Allocated memory is still 335.5MB. Free memory was 245.6MB in the beginning and 243.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 21:13:28,393 INFO L158 Benchmark]: RCFGBuilder took 440.16ms. Allocated memory is still 335.5MB. Free memory was 243.5MB in the beginning and 216.8MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2023-12-05 21:13:28,393 INFO L158 Benchmark]: TraceAbstraction took 63498.36ms. Allocated memory was 335.5MB in the beginning and 1.2GB in the end (delta: 822.1MB). Free memory was 216.3MB in the beginning and 693.7MB in the end (delta: -477.5MB). Peak memory consumption was 907.7MB. Max. memory is 8.0GB. [2023-12-05 21:13:28,394 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 184.5MB. Free memory is still 133.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 520.89ms. Allocated memory is still 335.5MB. Free memory was 287.0MB in the beginning and 248.2MB in the end (delta: 38.8MB). Peak memory consumption was 38.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 51.85ms. Allocated memory is still 335.5MB. Free memory was 248.2MB in the beginning and 245.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.77ms. Allocated memory is still 335.5MB. Free memory was 245.6MB in the beginning and 243.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 440.16ms. Allocated memory is still 335.5MB. Free memory was 243.5MB in the beginning and 216.8MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. * TraceAbstraction took 63498.36ms. Allocated memory was 335.5MB in the beginning and 1.2GB in the end (delta: 822.1MB). Free memory was 216.3MB in the beginning and 693.7MB in the end (delta: -477.5MB). Peak memory consumption was 907.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 207 locations, 55 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 63.4s, OverallIterations: 36, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 41.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9061 SdHoareTripleChecker+Valid, 14.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9061 mSDsluCounter, 9991 SdHoareTripleChecker+Invalid, 11.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8632 mSDsCounter, 1249 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32608 IncrementalHoareTripleChecker+Invalid, 33857 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1249 mSolverCounterUnsat, 1359 mSDtfsCounter, 32608 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1487 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20618 ImplicationChecksByTransitivity, 22.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42627occurred in iteration=36, InterpolantAutomatonStates: 1056, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 20.6s InterpolantComputationTime, 3023 NumberOfCodeBlocks, 3023 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2987 ConstructedInterpolants, 0 QuantifiedInterpolants, 40628 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 36 InterpolantComputations, 36 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 42 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-05 21:13:28,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...