/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/09-regions_09-arraylist.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 04:57:34,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 04:57:34,379 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-11-30 04:57:34,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 04:57:34,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 04:57:34,406 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 04:57:34,406 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 04:57:34,406 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 04:57:34,407 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 04:57:34,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 04:57:34,410 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 04:57:34,410 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 04:57:34,410 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 04:57:34,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 04:57:34,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 04:57:34,411 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 04:57:34,412 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 04:57:34,412 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 04:57:34,412 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 04:57:34,412 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 04:57:34,412 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 04:57:34,413 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 04:57:34,413 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 04:57:34,413 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 04:57:34,413 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 04:57:34,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 04:57:34,414 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 04:57:34,415 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 04:57:34,415 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 04:57:34,415 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 04:57:34,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 04:57:34,416 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 04:57:34,416 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 04:57:34,416 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 04:57:34,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 04:57:34,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 04:57:34,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 04:57:34,664 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 04:57:34,665 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 04:57:34,666 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_09-arraylist.i [2023-11-30 04:57:35,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 04:57:35,930 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 04:57:35,930 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_09-arraylist.i [2023-11-30 04:57:35,941 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9497887d/3c16fdf07a5b4943b3022ef31817ed2c/FLAG4abcc55b2 [2023-11-30 04:57:35,949 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9497887d/3c16fdf07a5b4943b3022ef31817ed2c [2023-11-30 04:57:35,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 04:57:35,951 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 04:57:35,952 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 04:57:35,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 04:57:35,955 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 04:57:35,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 04:57:35" (1/1) ... [2023-11-30 04:57:35,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65406b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:35, skipping insertion in model container [2023-11-30 04:57:35,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 04:57:35" (1/1) ... [2023-11-30 04:57:35,987 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 04:57:36,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 04:57:36,318 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 04:57:36,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 04:57:36,420 INFO L206 MainTranslator]: Completed translation [2023-11-30 04:57:36,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36 WrapperNode [2023-11-30 04:57:36,420 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 04:57:36,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 04:57:36,421 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 04:57:36,421 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 04:57:36,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,453 INFO L138 Inliner]: procedures = 372, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 127 [2023-11-30 04:57:36,453 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 04:57:36,453 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 04:57:36,453 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 04:57:36,453 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 04:57:36,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,461 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,467 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,468 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,469 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,470 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,473 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 04:57:36,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 04:57:36,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 04:57:36,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 04:57:36,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (1/1) ... [2023-11-30 04:57:36,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 04:57:36,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:57:36,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-30 04:57:36,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-30 04:57:36,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 04:57:36,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-30 04:57:36,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 04:57:36,521 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-30 04:57:36,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 04:57:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 04:57:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-30 04:57:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-30 04:57:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 04:57:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-30 04:57:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-30 04:57:36,522 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-30 04:57:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 04:57:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 04:57:36,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 04:57:36,523 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-30 04:57:36,618 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 04:57:36,619 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 04:57:36,843 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 04:57:36,856 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 04:57:36,857 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-30 04:57:36,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 04:57:36 BoogieIcfgContainer [2023-11-30 04:57:36,858 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 04:57:36,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 04:57:36,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 04:57:36,861 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 04:57:36,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 04:57:35" (1/3) ... [2023-11-30 04:57:36,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187f581c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 04:57:36, skipping insertion in model container [2023-11-30 04:57:36,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 04:57:36" (2/3) ... [2023-11-30 04:57:36,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187f581c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 04:57:36, skipping insertion in model container [2023-11-30 04:57:36,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 04:57:36" (3/3) ... [2023-11-30 04:57:36,863 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_09-arraylist.i [2023-11-30 04:57:36,873 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 04:57:36,873 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-11-30 04:57:36,874 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 04:57:36,931 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-30 04:57:36,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 187 transitions, 378 flow [2023-11-30 04:57:37,022 INFO L124 PetriNetUnfolderBase]: 4/186 cut-off events. [2023-11-30 04:57:37,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:57:37,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 186 events. 4/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 394 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-11-30 04:57:37,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 187 transitions, 378 flow [2023-11-30 04:57:37,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 186 transitions, 375 flow [2023-11-30 04:57:37,047 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 04:57:37,051 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;@298d94fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 04:57:37,051 INFO L363 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-11-30 04:57:37,062 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 04:57:37,062 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-11-30 04:57:37,062 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 04:57:37,062 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:37,063 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:37,063 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:37,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash -718043602, now seen corresponding path program 1 times [2023-11-30 04:57:37,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:37,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850120447] [2023-11-30 04:57:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:37,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:37,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850120447] [2023-11-30 04:57:37,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850120447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:57:37,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:57:37,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 04:57:37,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672190721] [2023-11-30 04:57:37,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:57:37,285 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 04:57:37,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:37,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 04:57:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 04:57:37,307 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 187 [2023-11-30 04:57:37,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 186 transitions, 375 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:37,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 187 [2023-11-30 04:57:37,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:37,403 INFO L124 PetriNetUnfolderBase]: 7/300 cut-off events. [2023-11-30 04:57:37,404 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-30 04:57:37,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 300 events. 7/300 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 745 event pairs, 6 based on Foata normal form. 4/233 useless extension candidates. Maximal degree in co-relation 180. Up to 30 conditions per place. [2023-11-30 04:57:37,407 INFO L140 encePairwiseOnDemand]: 181/187 looper letters, 22 selfloop transitions, 2 changer transitions 1/190 dead transitions. [2023-11-30 04:57:37,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 190 transitions, 431 flow [2023-11-30 04:57:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 04:57:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 04:57:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-11-30 04:57:37,420 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.9447415329768271 [2023-11-30 04:57:37,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-11-30 04:57:37,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-11-30 04:57:37,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:37,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-11-30 04:57:37,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,436 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 2 predicate places. [2023-11-30 04:57:37,437 INFO L500 AbstractCegarLoop]: Abstraction has has 188 places, 190 transitions, 431 flow [2023-11-30 04:57:37,437 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,437 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:37,437 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:37,438 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 04:57:37,438 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:37,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:37,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1563098668, now seen corresponding path program 1 times [2023-11-30 04:57:37,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:37,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308241685] [2023-11-30 04:57:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:37,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:37,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:37,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308241685] [2023-11-30 04:57:37,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308241685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:57:37,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:57:37,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 04:57:37,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713321228] [2023-11-30 04:57:37,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:57:37,604 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 04:57:37,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:37,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 04:57:37,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-30 04:57:37,606 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 187 [2023-11-30 04:57:37,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 190 transitions, 431 flow. Second operand has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:37,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 187 [2023-11-30 04:57:37,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:37,826 INFO L124 PetriNetUnfolderBase]: 138/761 cut-off events. [2023-11-30 04:57:37,826 INFO L125 PetriNetUnfolderBase]: For 55/61 co-relation queries the response was YES. [2023-11-30 04:57:37,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 761 events. 138/761 cut-off events. For 55/61 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4252 event pairs, 137 based on Foata normal form. 0/622 useless extension candidates. Maximal degree in co-relation 962. Up to 332 conditions per place. [2023-11-30 04:57:37,833 INFO L140 encePairwiseOnDemand]: 175/187 looper letters, 55 selfloop transitions, 8 changer transitions 1/186 dead transitions. [2023-11-30 04:57:37,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 186 transitions, 549 flow [2023-11-30 04:57:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-30 04:57:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-30 04:57:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 660 transitions. [2023-11-30 04:57:37,835 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2023-11-30 04:57:37,836 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 660 transitions. [2023-11-30 04:57:37,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 660 transitions. [2023-11-30 04:57:37,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:37,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 660 transitions. [2023-11-30 04:57:37,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,840 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,841 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 2 predicate places. [2023-11-30 04:57:37,841 INFO L500 AbstractCegarLoop]: Abstraction has has 188 places, 186 transitions, 549 flow [2023-11-30 04:57:37,841 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:37,841 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:37,841 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:37,841 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 04:57:37,842 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:37,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1563098667, now seen corresponding path program 1 times [2023-11-30 04:57:37,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:37,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195711584] [2023-11-30 04:57:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:37,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:38,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:38,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195711584] [2023-11-30 04:57:38,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195711584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:57:38,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:57:38,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 04:57:38,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348376949] [2023-11-30 04:57:38,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:57:38,003 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 04:57:38,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 04:57:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-30 04:57:38,007 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 187 [2023-11-30 04:57:38,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 186 transitions, 549 flow. Second operand has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:38,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 187 [2023-11-30 04:57:38,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:38,210 INFO L124 PetriNetUnfolderBase]: 213/953 cut-off events. [2023-11-30 04:57:38,214 INFO L125 PetriNetUnfolderBase]: For 321/380 co-relation queries the response was YES. [2023-11-30 04:57:38,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 953 events. 213/953 cut-off events. For 321/380 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5930 event pairs, 212 based on Foata normal form. 0/929 useless extension candidates. Maximal degree in co-relation 1604. Up to 405 conditions per place. [2023-11-30 04:57:38,219 INFO L140 encePairwiseOnDemand]: 175/187 looper letters, 51 selfloop transitions, 8 changer transitions 1/182 dead transitions. [2023-11-30 04:57:38,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 182 transitions, 651 flow [2023-11-30 04:57:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-30 04:57:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-30 04:57:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-11-30 04:57:38,221 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7101604278074867 [2023-11-30 04:57:38,221 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-11-30 04:57:38,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-11-30 04:57:38,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:38,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-11-30 04:57:38,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,225 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,226 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 2 predicate places. [2023-11-30 04:57:38,226 INFO L500 AbstractCegarLoop]: Abstraction has has 188 places, 182 transitions, 651 flow [2023-11-30 04:57:38,226 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,226 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:38,227 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:38,227 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-30 04:57:38,227 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:38,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:38,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1811731681, now seen corresponding path program 1 times [2023-11-30 04:57:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:38,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807625262] [2023-11-30 04:57:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:38,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:38,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:38,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807625262] [2023-11-30 04:57:38,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807625262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:57:38,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:57:38,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:57:38,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403741867] [2023-11-30 04:57:38,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:57:38,447 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:57:38,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:57:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:57:38,449 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 187 [2023-11-30 04:57:38,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 182 transitions, 651 flow. Second operand has 7 states, 7 states have (on average 115.14285714285714) internal successors, (806), 7 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:38,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 187 [2023-11-30 04:57:38,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:38,623 INFO L124 PetriNetUnfolderBase]: 198/934 cut-off events. [2023-11-30 04:57:38,623 INFO L125 PetriNetUnfolderBase]: For 738/867 co-relation queries the response was YES. [2023-11-30 04:57:38,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 934 events. 198/934 cut-off events. For 738/867 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5738 event pairs, 181 based on Foata normal form. 32/944 useless extension candidates. Maximal degree in co-relation 1915. Up to 379 conditions per place. [2023-11-30 04:57:38,627 INFO L140 encePairwiseOnDemand]: 179/187 looper letters, 78 selfloop transitions, 4 changer transitions 5/201 dead transitions. [2023-11-30 04:57:38,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 201 transitions, 931 flow [2023-11-30 04:57:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-30 04:57:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-30 04:57:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 651 transitions. [2023-11-30 04:57:38,629 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6962566844919786 [2023-11-30 04:57:38,629 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 651 transitions. [2023-11-30 04:57:38,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 651 transitions. [2023-11-30 04:57:38,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:38,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 651 transitions. [2023-11-30 04:57:38,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,632 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,633 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 3 predicate places. [2023-11-30 04:57:38,633 INFO L500 AbstractCegarLoop]: Abstraction has has 189 places, 201 transitions, 931 flow [2023-11-30 04:57:38,633 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.14285714285714) internal successors, (806), 7 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,633 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:38,633 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:38,634 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 04:57:38,634 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:38,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:38,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1811731682, now seen corresponding path program 1 times [2023-11-30 04:57:38,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:38,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835062103] [2023-11-30 04:57:38,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:38,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:38,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:38,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835062103] [2023-11-30 04:57:38,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835062103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:57:38,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:57:38,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 04:57:38,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521552352] [2023-11-30 04:57:38,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:57:38,815 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 04:57:38,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:38,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 04:57:38,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-30 04:57:38,816 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 187 [2023-11-30 04:57:38,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 201 transitions, 931 flow. Second operand has 8 states, 8 states have (on average 98.125) internal successors, (785), 8 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:38,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:38,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 187 [2023-11-30 04:57:38,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:39,116 INFO L124 PetriNetUnfolderBase]: 269/1128 cut-off events. [2023-11-30 04:57:39,116 INFO L125 PetriNetUnfolderBase]: For 1571/1792 co-relation queries the response was YES. [2023-11-30 04:57:39,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 1128 events. 269/1128 cut-off events. For 1571/1792 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7368 event pairs, 201 based on Foata normal form. 13/1117 useless extension candidates. Maximal degree in co-relation 2939. Up to 504 conditions per place. [2023-11-30 04:57:39,172 INFO L140 encePairwiseOnDemand]: 178/187 looper letters, 140 selfloop transitions, 7 changer transitions 7/248 dead transitions. [2023-11-30 04:57:39,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 248 transitions, 1535 flow [2023-11-30 04:57:39,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 04:57:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 04:57:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 724 transitions. [2023-11-30 04:57:39,174 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6452762923351159 [2023-11-30 04:57:39,174 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 724 transitions. [2023-11-30 04:57:39,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 724 transitions. [2023-11-30 04:57:39,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:39,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 724 transitions. [2023-11-30 04:57:39,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:39,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:39,177 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:39,178 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 8 predicate places. [2023-11-30 04:57:39,178 INFO L500 AbstractCegarLoop]: Abstraction has has 194 places, 248 transitions, 1535 flow [2023-11-30 04:57:39,178 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.125) internal successors, (785), 8 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:39,178 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:39,178 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:39,178 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-30 04:57:39,178 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:39,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:39,179 INFO L85 PathProgramCache]: Analyzing trace with hash 16406645, now seen corresponding path program 1 times [2023-11-30 04:57:39,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:39,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456065534] [2023-11-30 04:57:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:39,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:39,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:39,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456065534] [2023-11-30 04:57:39,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456065534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:57:39,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:57:39,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-30 04:57:39,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335335984] [2023-11-30 04:57:39,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:57:39,511 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-30 04:57:39,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:39,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-30 04:57:39,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-30 04:57:39,513 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 187 [2023-11-30 04:57:39,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 248 transitions, 1535 flow. Second operand has 15 states, 15 states have (on average 94.4) internal successors, (1416), 15 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:39,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:39,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 187 [2023-11-30 04:57:39,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:40,499 INFO L124 PetriNetUnfolderBase]: 269/1124 cut-off events. [2023-11-30 04:57:40,499 INFO L125 PetriNetUnfolderBase]: For 2492/2784 co-relation queries the response was YES. [2023-11-30 04:57:40,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3905 conditions, 1124 events. 269/1124 cut-off events. For 2492/2784 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7340 event pairs, 201 based on Foata normal form. 15/1115 useless extension candidates. Maximal degree in co-relation 3420. Up to 502 conditions per place. [2023-11-30 04:57:40,517 INFO L140 encePairwiseOnDemand]: 161/187 looper letters, 102 selfloop transitions, 35 changer transitions 7/245 dead transitions. [2023-11-30 04:57:40,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 245 transitions, 1791 flow [2023-11-30 04:57:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-30 04:57:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-30 04:57:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2214 transitions. [2023-11-30 04:57:40,528 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5147640083701465 [2023-11-30 04:57:40,528 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2214 transitions. [2023-11-30 04:57:40,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2214 transitions. [2023-11-30 04:57:40,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:40,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2214 transitions. [2023-11-30 04:57:40,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 96.26086956521739) internal successors, (2214), 23 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:40,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 187.0) internal successors, (4488), 24 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:40,537 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 187.0) internal successors, (4488), 24 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:40,537 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 28 predicate places. [2023-11-30 04:57:40,538 INFO L500 AbstractCegarLoop]: Abstraction has has 214 places, 245 transitions, 1791 flow [2023-11-30 04:57:40,538 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 94.4) internal successors, (1416), 15 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:40,538 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:40,538 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:40,538 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-30 04:57:40,538 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:40,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:40,539 INFO L85 PathProgramCache]: Analyzing trace with hash 16406646, now seen corresponding path program 1 times [2023-11-30 04:57:40,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:40,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120381666] [2023-11-30 04:57:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:40,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:41,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:41,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120381666] [2023-11-30 04:57:41,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120381666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:57:41,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:57:41,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-30 04:57:41,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304499193] [2023-11-30 04:57:41,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:57:41,046 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-30 04:57:41,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:41,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-30 04:57:41,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-30 04:57:41,047 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 187 [2023-11-30 04:57:41,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 245 transitions, 1791 flow. Second operand has 14 states, 14 states have (on average 85.57142857142857) internal successors, (1198), 14 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:41,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:41,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 187 [2023-11-30 04:57:41,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:41,788 INFO L124 PetriNetUnfolderBase]: 269/1120 cut-off events. [2023-11-30 04:57:41,789 INFO L125 PetriNetUnfolderBase]: For 3547/3943 co-relation queries the response was YES. [2023-11-30 04:57:41,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4584 conditions, 1120 events. 269/1120 cut-off events. For 3547/3943 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7388 event pairs, 201 based on Foata normal form. 17/1113 useless extension candidates. Maximal degree in co-relation 4024. Up to 500 conditions per place. [2023-11-30 04:57:41,795 INFO L140 encePairwiseOnDemand]: 160/187 looper letters, 118 selfloop transitions, 38 changer transitions 7/244 dead transitions. [2023-11-30 04:57:41,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 244 transitions, 2101 flow [2023-11-30 04:57:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-30 04:57:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-30 04:57:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2102 transitions. [2023-11-30 04:57:41,799 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4683600713012478 [2023-11-30 04:57:41,799 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2102 transitions. [2023-11-30 04:57:41,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2102 transitions. [2023-11-30 04:57:41,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:41,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2102 transitions. [2023-11-30 04:57:41,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 87.58333333333333) internal successors, (2102), 24 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:41,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 187.0) internal successors, (4675), 25 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:41,807 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 187.0) internal successors, (4675), 25 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:41,808 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 49 predicate places. [2023-11-30 04:57:41,808 INFO L500 AbstractCegarLoop]: Abstraction has has 235 places, 244 transitions, 2101 flow [2023-11-30 04:57:41,808 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 85.57142857142857) internal successors, (1198), 14 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:41,808 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:41,809 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:41,809 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-30 04:57:41,809 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:41,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:41,809 INFO L85 PathProgramCache]: Analyzing trace with hash -754239621, now seen corresponding path program 1 times [2023-11-30 04:57:41,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:41,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744203392] [2023-11-30 04:57:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:41,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:41,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:41,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744203392] [2023-11-30 04:57:41,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744203392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:57:41,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:57:41,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 04:57:41,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265204809] [2023-11-30 04:57:41,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:57:41,966 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 04:57:41,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:41,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 04:57:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-30 04:57:41,967 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 187 [2023-11-30 04:57:41,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 244 transitions, 2101 flow. Second operand has 8 states, 8 states have (on average 112.0) internal successors, (896), 8 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:41,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:41,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 187 [2023-11-30 04:57:41,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:42,265 INFO L124 PetriNetUnfolderBase]: 269/1118 cut-off events. [2023-11-30 04:57:42,265 INFO L125 PetriNetUnfolderBase]: For 4742/5189 co-relation queries the response was YES. [2023-11-30 04:57:42,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5106 conditions, 1118 events. 269/1118 cut-off events. For 4742/5189 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7328 event pairs, 201 based on Foata normal form. 3/1097 useless extension candidates. Maximal degree in co-relation 4480. Up to 499 conditions per place. [2023-11-30 04:57:42,271 INFO L140 encePairwiseOnDemand]: 168/187 looper letters, 91 selfloop transitions, 26 changer transitions 7/242 dead transitions. [2023-11-30 04:57:42,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 242 transitions, 2331 flow [2023-11-30 04:57:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-30 04:57:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-30 04:57:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1255 transitions. [2023-11-30 04:57:42,275 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6101118133203695 [2023-11-30 04:57:42,275 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1255 transitions. [2023-11-30 04:57:42,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1255 transitions. [2023-11-30 04:57:42,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:42,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1255 transitions. [2023-11-30 04:57:42,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 114.0909090909091) internal successors, (1255), 11 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,280 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,280 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 58 predicate places. [2023-11-30 04:57:42,281 INFO L500 AbstractCegarLoop]: Abstraction has has 244 places, 242 transitions, 2331 flow [2023-11-30 04:57:42,281 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 112.0) internal successors, (896), 8 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,281 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:42,281 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:42,281 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-30 04:57:42,281 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:42,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:42,282 INFO L85 PathProgramCache]: Analyzing trace with hash -754239622, now seen corresponding path program 1 times [2023-11-30 04:57:42,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:42,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153480796] [2023-11-30 04:57:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:42,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:42,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:42,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153480796] [2023-11-30 04:57:42,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153480796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 04:57:42,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 04:57:42,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-30 04:57:42,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862961155] [2023-11-30 04:57:42,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 04:57:42,354 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-30 04:57:42,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-30 04:57:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-30 04:57:42,355 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 187 [2023-11-30 04:57:42,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 242 transitions, 2331 flow. Second operand has 7 states, 7 states have (on average 112.42857142857143) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:42,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 187 [2023-11-30 04:57:42,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:42,590 INFO L124 PetriNetUnfolderBase]: 269/1116 cut-off events. [2023-11-30 04:57:42,590 INFO L125 PetriNetUnfolderBase]: For 6211/6730 co-relation queries the response was YES. [2023-11-30 04:57:42,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5604 conditions, 1116 events. 269/1116 cut-off events. For 6211/6730 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7315 event pairs, 201 based on Foata normal form. 12/1104 useless extension candidates. Maximal degree in co-relation 4925. Up to 498 conditions per place. [2023-11-30 04:57:42,596 INFO L140 encePairwiseOnDemand]: 171/187 looper letters, 90 selfloop transitions, 19 changer transitions 7/240 dead transitions. [2023-11-30 04:57:42,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 240 transitions, 2533 flow [2023-11-30 04:57:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-30 04:57:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-30 04:57:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1049 transitions. [2023-11-30 04:57:42,598 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6232917409387998 [2023-11-30 04:57:42,598 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1049 transitions. [2023-11-30 04:57:42,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1049 transitions. [2023-11-30 04:57:42,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:42,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1049 transitions. [2023-11-30 04:57:42,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.55555555555556) internal successors, (1049), 9 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,630 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,631 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 65 predicate places. [2023-11-30 04:57:42,631 INFO L500 AbstractCegarLoop]: Abstraction has has 251 places, 240 transitions, 2533 flow [2023-11-30 04:57:42,631 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 112.42857142857143) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,631 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:42,631 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:42,631 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-30 04:57:42,631 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:42,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:42,632 INFO L85 PathProgramCache]: Analyzing trace with hash 431392053, now seen corresponding path program 1 times [2023-11-30 04:57:42,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:42,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167795246] [2023-11-30 04:57:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:42,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:42,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:42,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167795246] [2023-11-30 04:57:42,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167795246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:57:42,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355086809] [2023-11-30 04:57:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:42,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:57:42,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:57:42,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:57:42,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-30 04:57:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:42,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-30 04:57:42,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:57:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:42,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 04:57:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:42,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355086809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 04:57:42,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 04:57:42,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-30 04:57:42,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424827869] [2023-11-30 04:57:42,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 04:57:42,958 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-30 04:57:42,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:42,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-30 04:57:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-30 04:57:42,961 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 187 [2023-11-30 04:57:42,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 240 transitions, 2533 flow. Second operand has 10 states, 10 states have (on average 168.4) internal successors, (1684), 10 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:42,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:42,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 187 [2023-11-30 04:57:42,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:43,172 INFO L124 PetriNetUnfolderBase]: 269/1166 cut-off events. [2023-11-30 04:57:43,173 INFO L125 PetriNetUnfolderBase]: For 7354/7869 co-relation queries the response was YES. [2023-11-30 04:57:43,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6046 conditions, 1166 events. 269/1166 cut-off events. For 7354/7869 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6996 event pairs, 201 based on Foata normal form. 1/1143 useless extension candidates. Maximal degree in co-relation 5050. Up to 523 conditions per place. [2023-11-30 04:57:43,180 INFO L140 encePairwiseOnDemand]: 181/187 looper letters, 27 selfloop transitions, 9 changer transitions 7/250 dead transitions. [2023-11-30 04:57:43,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 250 transitions, 2727 flow [2023-11-30 04:57:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-30 04:57:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-30 04:57:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1529 transitions. [2023-11-30 04:57:43,184 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.9084967320261438 [2023-11-30 04:57:43,184 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1529 transitions. [2023-11-30 04:57:43,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1529 transitions. [2023-11-30 04:57:43,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:43,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1529 transitions. [2023-11-30 04:57:43,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.88888888888889) internal successors, (1529), 9 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:43,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:43,190 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 187.0) internal successors, (1870), 10 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:43,191 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 73 predicate places. [2023-11-30 04:57:43,191 INFO L500 AbstractCegarLoop]: Abstraction has has 259 places, 250 transitions, 2727 flow [2023-11-30 04:57:43,192 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 168.4) internal successors, (1684), 10 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:43,192 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:43,192 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:43,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-30 04:57:43,404 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-30 04:57:43,404 INFO L425 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:43,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:43,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1447950121, now seen corresponding path program 1 times [2023-11-30 04:57:43,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:43,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983848835] [2023-11-30 04:57:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:43,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:43,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983848835] [2023-11-30 04:57:43,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983848835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:57:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355981452] [2023-11-30 04:57:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:43,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:57:43,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:57:43,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:57:43,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-30 04:57:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:44,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-30 04:57:44,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:57:44,235 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-30 04:57:44,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-30 04:57:44,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 04:57:44,421 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-30 04:57:44,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-30 04:57:44,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 04:57:44,578 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:57:44,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-30 04:57:44,592 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:57:44,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 04:57:44,846 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:57:44,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-30 04:57:44,858 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:57:44,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 04:57:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:45,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 04:57:45,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 04:57:45,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-30 04:57:45,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 04:57:45,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-30 04:57:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:46,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355981452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 04:57:46,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 04:57:46,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 31 [2023-11-30 04:57:46,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349557880] [2023-11-30 04:57:46,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 04:57:46,480 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-30 04:57:46,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-30 04:57:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-11-30 04:57:46,483 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 187 [2023-11-30 04:57:46,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 250 transitions, 2727 flow. Second operand has 32 states, 32 states have (on average 96.90625) internal successors, (3101), 32 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:46,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:46,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 187 [2023-11-30 04:57:46,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:47,363 INFO L124 PetriNetUnfolderBase]: 269/1177 cut-off events. [2023-11-30 04:57:47,363 INFO L125 PetriNetUnfolderBase]: For 9211/9841 co-relation queries the response was YES. [2023-11-30 04:57:47,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6818 conditions, 1177 events. 269/1177 cut-off events. For 9211/9841 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7080 event pairs, 201 based on Foata normal form. 19/1172 useless extension candidates. Maximal degree in co-relation 5654. Up to 528 conditions per place. [2023-11-30 04:57:47,372 INFO L140 encePairwiseOnDemand]: 170/187 looper letters, 154 selfloop transitions, 24 changer transitions 7/277 dead transitions. [2023-11-30 04:57:47,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 277 transitions, 3569 flow [2023-11-30 04:57:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-30 04:57:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-30 04:57:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1676 transitions. [2023-11-30 04:57:47,374 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.5601604278074866 [2023-11-30 04:57:47,375 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1676 transitions. [2023-11-30 04:57:47,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1676 transitions. [2023-11-30 04:57:47,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:47,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1676 transitions. [2023-11-30 04:57:47,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 104.75) internal successors, (1676), 16 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:47,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 187.0) internal successors, (3179), 17 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:47,380 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 187.0) internal successors, (3179), 17 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:47,380 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 87 predicate places. [2023-11-30 04:57:47,381 INFO L500 AbstractCegarLoop]: Abstraction has has 273 places, 277 transitions, 3569 flow [2023-11-30 04:57:47,382 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 96.90625) internal successors, (3101), 32 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:47,382 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:47,382 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:47,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-30 04:57:47,587 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-30 04:57:47,588 INFO L425 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:47,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash -478128509, now seen corresponding path program 2 times [2023-11-30 04:57:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:47,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950980132] [2023-11-30 04:57:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:47,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:47,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:47,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950980132] [2023-11-30 04:57:47,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950980132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:57:47,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102290595] [2023-11-30 04:57:47,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-30 04:57:47,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:57:47,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:57:47,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:57:47,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-30 04:57:47,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-30 04:57:47,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-30 04:57:47,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-30 04:57:47,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:57:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:48,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 04:57:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:48,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102290595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 04:57:48,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 04:57:48,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-30 04:57:48,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326155861] [2023-11-30 04:57:48,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 04:57:48,386 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-30 04:57:48,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-30 04:57:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-30 04:57:48,388 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 187 [2023-11-30 04:57:48,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 277 transitions, 3569 flow. Second operand has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:48,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:48,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 187 [2023-11-30 04:57:48,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:48,825 INFO L124 PetriNetUnfolderBase]: 269/1350 cut-off events. [2023-11-30 04:57:48,825 INFO L125 PetriNetUnfolderBase]: For 11486/12108 co-relation queries the response was YES. [2023-11-30 04:57:48,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 1350 events. 269/1350 cut-off events. For 11486/12108 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7005 event pairs, 201 based on Foata normal form. 0/1326 useless extension candidates. Maximal degree in co-relation 5779. Up to 611 conditions per place. [2023-11-30 04:57:48,834 INFO L140 encePairwiseOnDemand]: 181/187 looper letters, 39 selfloop transitions, 21 changer transitions 7/303 dead transitions. [2023-11-30 04:57:48,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 303 transitions, 4115 flow [2023-11-30 04:57:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-30 04:57:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-30 04:57:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3547 transitions. [2023-11-30 04:57:48,838 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.9032340208810797 [2023-11-30 04:57:48,838 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3547 transitions. [2023-11-30 04:57:48,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3547 transitions. [2023-11-30 04:57:48,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:48,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3547 transitions. [2023-11-30 04:57:48,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 168.9047619047619) internal successors, (3547), 21 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:48,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 187.0) internal successors, (4114), 22 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:48,857 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 187.0) internal successors, (4114), 22 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:48,857 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 107 predicate places. [2023-11-30 04:57:48,857 INFO L500 AbstractCegarLoop]: Abstraction has has 293 places, 303 transitions, 4115 flow [2023-11-30 04:57:48,858 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:48,858 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:48,858 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:48,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-30 04:57:49,065 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:57:49,066 INFO L425 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:49,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:49,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1282735863, now seen corresponding path program 2 times [2023-11-30 04:57:49,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:49,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65605746] [2023-11-30 04:57:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:49,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:50,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:50,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65605746] [2023-11-30 04:57:50,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65605746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:57:50,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375360288] [2023-11-30 04:57:50,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-30 04:57:50,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:57:50,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:57:50,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:57:50,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-30 04:57:50,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-30 04:57:50,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-30 04:57:50,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-30 04:57:50,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 04:57:50,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 04:57:50,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 04:57:50,834 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:57:50,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-30 04:57:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 04:57:50,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 04:57:51,039 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:57:51,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 04:57:51,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 04:57:51,252 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:57:51,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 04:57:51,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 04:57:51,343 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:57:51,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-30 04:57:51,355 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:57:51,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 04:57:51,522 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:57:51,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 04:57:51,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 04:57:51,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-30 04:57:51,706 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:57:51,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-30 04:57:51,715 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 04:57:51,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 04:57:51,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-30 04:57:51,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-30 04:57:51,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-30 04:57:52,022 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 04:57:52,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-30 04:57:52,037 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 04:57:52,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-30 04:57:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:52,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 04:57:52,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 04:57:52,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-30 04:57:52,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 04:57:52,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-30 04:57:53,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 04:57:53,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-30 04:57:53,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 04:57:53,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-30 04:57:54,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 04:57:54,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-30 04:57:54,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 04:57:54,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-30 04:57:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:54,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375360288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 04:57:54,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 04:57:54,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 16] total 62 [2023-11-30 04:57:54,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057821250] [2023-11-30 04:57:54,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 04:57:54,846 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-30 04:57:54,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 04:57:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-30 04:57:54,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=3356, Unknown=0, NotChecked=0, Total=3906 [2023-11-30 04:57:54,869 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 187 [2023-11-30 04:57:54,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 303 transitions, 4115 flow. Second operand has 63 states, 63 states have (on average 88.76190476190476) internal successors, (5592), 63 states have internal predecessors, (5592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:54,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 04:57:54,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 187 [2023-11-30 04:57:54,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 04:57:58,516 INFO L124 PetriNetUnfolderBase]: 269/1361 cut-off events. [2023-11-30 04:57:58,516 INFO L125 PetriNetUnfolderBase]: For 13930/14667 co-relation queries the response was YES. [2023-11-30 04:57:58,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9053 conditions, 1361 events. 269/1361 cut-off events. For 13930/14667 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 7091 event pairs, 201 based on Foata normal form. 17/1354 useless extension candidates. Maximal degree in co-relation 6383. Up to 616 conditions per place. [2023-11-30 04:57:58,522 INFO L140 encePairwiseOnDemand]: 160/187 looper letters, 282 selfloop transitions, 62 changer transitions 7/432 dead transitions. [2023-11-30 04:57:58,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 432 transitions, 6741 flow [2023-11-30 04:57:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-30 04:57:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-30 04:57:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4390 transitions. [2023-11-30 04:57:58,532 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.47910073120157154 [2023-11-30 04:57:58,532 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4390 transitions. [2023-11-30 04:57:58,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4390 transitions. [2023-11-30 04:57:58,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 04:57:58,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4390 transitions. [2023-11-30 04:57:58,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 89.59183673469387) internal successors, (4390), 49 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:58,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 187.0) internal successors, (9350), 50 states have internal predecessors, (9350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:58,547 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 187.0) internal successors, (9350), 50 states have internal predecessors, (9350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:58,548 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 155 predicate places. [2023-11-30 04:57:58,548 INFO L500 AbstractCegarLoop]: Abstraction has has 341 places, 432 transitions, 6741 flow [2023-11-30 04:57:58,549 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 88.76190476190476) internal successors, (5592), 63 states have internal predecessors, (5592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 04:57:58,549 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 04:57:58,549 INFO L232 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 04:57:58,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-30 04:57:58,755 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:57:58,755 INFO L425 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 04:57:58,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 04:57:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash 335513119, now seen corresponding path program 3 times [2023-11-30 04:57:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 04:57:58,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889287111] [2023-11-30 04:57:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 04:57:58,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 04:57:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 04:57:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 973 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 04:57:59,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 04:57:59,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889287111] [2023-11-30 04:57:59,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889287111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 04:57:59,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038492761] [2023-11-30 04:57:59,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-30 04:57:59,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 04:57:59,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 04:57:59,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 04:57:59,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-30 05:05:16,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-30 05:05:16,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-30 05:05:16,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-30 05:05:16,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:05:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 973 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:05:17,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:05:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 973 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:05:17,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038492761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:05:17,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:05:17,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-11-30 05:05:17,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800516442] [2023-11-30 05:05:17,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:05:17,511 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-30 05:05:17,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:05:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-30 05:05:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-11-30 05:05:17,513 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 187 [2023-11-30 05:05:17,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 432 transitions, 6741 flow. Second operand has 23 states, 23 states have (on average 168.8695652173913) internal successors, (3884), 23 states have internal predecessors, (3884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:05:17,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:05:17,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 187 [2023-11-30 05:05:17,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:05:18,253 INFO L124 PetriNetUnfolderBase]: 269/1487 cut-off events. [2023-11-30 05:05:18,253 INFO L125 PetriNetUnfolderBase]: For 16393/17124 co-relation queries the response was YES. [2023-11-30 05:05:18,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10168 conditions, 1487 events. 269/1487 cut-off events. For 16393/17124 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7002 event pairs, 201 based on Foata normal form. 0/1463 useless extension candidates. Maximal degree in co-relation 6508. Up to 676 conditions per place. [2023-11-30 05:05:18,260 INFO L140 encePairwiseOnDemand]: 181/187 looper letters, 47 selfloop transitions, 30 changer transitions 7/451 dead transitions. [2023-11-30 05:05:18,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 451 transitions, 7281 flow [2023-11-30 05:05:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-30 05:05:18,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-30 05:05:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5057 transitions. [2023-11-30 05:05:18,264 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.9014260249554367 [2023-11-30 05:05:18,264 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5057 transitions. [2023-11-30 05:05:18,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5057 transitions. [2023-11-30 05:05:18,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:05:18,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5057 transitions. [2023-11-30 05:05:18,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 168.56666666666666) internal successors, (5057), 30 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:05:18,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 187.0) internal successors, (5797), 31 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:05:18,275 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 187.0) internal successors, (5797), 31 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:05:18,275 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 184 predicate places. [2023-11-30 05:05:18,275 INFO L500 AbstractCegarLoop]: Abstraction has has 370 places, 451 transitions, 7281 flow [2023-11-30 05:05:18,276 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 168.8695652173913) internal successors, (3884), 23 states have internal predecessors, (3884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:05:18,276 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:05:18,276 INFO L232 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:05:18,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-30 05:05:18,494 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-30 05:05:18,494 INFO L425 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 05:05:18,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:05:18,495 INFO L85 PathProgramCache]: Analyzing trace with hash -496870509, now seen corresponding path program 3 times [2023-11-30 05:05:18,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:05:18,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962628870] [2023-11-30 05:05:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:05:18,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:05:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:05:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:05:22,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:05:22,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962628870] [2023-11-30 05:05:22,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962628870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:05:22,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331682463] [2023-11-30 05:05:22,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-30 05:05:22,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:05:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:05:22,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 05:05:22,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-30 05:06:08,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-30 05:06:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-30 05:06:08,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 291 conjunts are in the unsatisfiable core [2023-11-30 05:06:08,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:06:08,897 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-30 05:06:08,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-30 05:06:08,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:06:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:06:08,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:06:09,083 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:09,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:09,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:06:09,598 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 05:06:09,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-30 05:06:09,610 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:09,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:09,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-30 05:06:09,848 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 05:06:09,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-30 05:06:09,859 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:09,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:09,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-30 05:06:09,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-30 05:06:10,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2023-11-30 05:06:10,390 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 05:06:10,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-30 05:06:10,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-30 05:06:10,724 INFO L349 Elim1Store]: treesize reduction 40, result has 56.0 percent of original size [2023-11-30 05:06:10,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 69 [2023-11-30 05:06:10,757 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:10,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:10,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2023-11-30 05:06:10,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2023-11-30 05:06:11,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 29 [2023-11-30 05:06:12,051 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-30 05:06:12,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-11-30 05:06:12,065 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:12,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:12,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-30 05:06:12,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-30 05:06:12,706 INFO L349 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2023-11-30 05:06:12,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 26 [2023-11-30 05:06:12,713 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-30 05:06:12,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2023-11-30 05:06:12,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2023-11-30 05:06:12,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-30 05:06:12,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2023-11-30 05:06:12,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-30 05:06:13,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-30 05:06:13,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2023-11-30 05:06:13,808 INFO L349 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2023-11-30 05:06:13,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 29 [2023-11-30 05:06:14,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-30 05:06:14,499 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:14,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:14,520 INFO L349 Elim1Store]: treesize reduction 64, result has 44.3 percent of original size [2023-11-30 05:06:14,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 95 [2023-11-30 05:06:14,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 42 [2023-11-30 05:06:14,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 42 [2023-11-30 05:06:14,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2023-11-30 05:06:15,485 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:15,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:15,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-11-30 05:06:15,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-30 05:06:15,972 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:15,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:15,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-11-30 05:06:16,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-30 05:06:16,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-30 05:06:16,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2023-11-30 05:06:17,225 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:17,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:17,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-11-30 05:06:17,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-30 05:06:17,723 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-30 05:06:17,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-30 05:06:17,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:06:17,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-30 05:06:17,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-30 05:06:18,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2023-11-30 05:06:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:06:19,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:06:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:06:19,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:06:19,952 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:06:19,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:06:20,326 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:06:20,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:06:21,805 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:06:21,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:06:22,477 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:06:22,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:06:31,570 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:06:31,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:06:33,394 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:06:33,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:06:37,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 05:06:37,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2023-11-30 05:06:37,100 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-30 05:06:37,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2023-11-30 05:06:37,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-30 05:06:37,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-11-30 05:06:37,130 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-30 05:06:37,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-30 05:06:38,206 INFO L349 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-11-30 05:06:38,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 19 [2023-11-30 05:06:51,213 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-30 05:06:51,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-30 05:06:59,839 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:06:59,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:07:22,707 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:07:22,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:07:48,531 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:07:48,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:08:37,111 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-30 05:08:37,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-30 05:09:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:09:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331682463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:09:55,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:09:55,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 103, 52] total 189 [2023-11-30 05:09:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248933457] [2023-11-30 05:09:55,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:09:55,309 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2023-11-30 05:09:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:09:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2023-11-30 05:09:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3433, Invalid=32393, Unknown=84, NotChecked=0, Total=35910 [2023-11-30 05:09:55,335 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 187 [2023-11-30 05:09:55,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 451 transitions, 7281 flow. Second operand has 190 states, 190 states have (on average 83.5) internal successors, (15865), 190 states have internal predecessors, (15865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:09:55,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:09:55,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 187 [2023-11-30 05:09:55,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:10:48,580 INFO L124 PetriNetUnfolderBase]: 267/1501 cut-off events. [2023-11-30 05:10:48,580 INFO L125 PetriNetUnfolderBase]: For 19403/20249 co-relation queries the response was YES. [2023-11-30 05:10:48,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11273 conditions, 1501 events. 267/1501 cut-off events. For 19403/20249 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7124 event pairs, 200 based on Foata normal form. 16/1493 useless extension candidates. Maximal degree in co-relation 7114. Up to 682 conditions per place. [2023-11-30 05:10:48,618 INFO L140 encePairwiseOnDemand]: 147/187 looper letters, 285 selfloop transitions, 203 changer transitions 7/572 dead transitions. [2023-11-30 05:10:48,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 572 transitions, 10101 flow [2023-11-30 05:10:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-11-30 05:10:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2023-11-30 05:10:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 15633 transitions. [2023-11-30 05:10:48,633 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.4354110962566845 [2023-11-30 05:10:48,633 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 15633 transitions. [2023-11-30 05:10:48,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 15633 transitions. [2023-11-30 05:10:48,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:10:48,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 15633 transitions. [2023-11-30 05:10:48,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 81.421875) internal successors, (15633), 192 states have internal predecessors, (15633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:10:48,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 187.0) internal successors, (36091), 193 states have internal predecessors, (36091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:10:48,685 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 187.0) internal successors, (36091), 193 states have internal predecessors, (36091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:10:48,686 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 375 predicate places. [2023-11-30 05:10:48,687 INFO L500 AbstractCegarLoop]: Abstraction has has 561 places, 572 transitions, 10101 flow [2023-11-30 05:10:48,689 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 83.5) internal successors, (15865), 190 states have internal predecessors, (15865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:10:48,689 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:10:48,689 INFO L232 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:10:48,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-30 05:10:48,916 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-30 05:10:48,917 INFO L425 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 05:10:48,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:10:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1921633589, now seen corresponding path program 1 times [2023-11-30 05:10:48,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:10:48,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706643790] [2023-11-30 05:10:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:10:48,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:10:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:10:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 1269 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2023-11-30 05:10:52,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:10:52,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706643790] [2023-11-30 05:10:52,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706643790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:10:52,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744612155] [2023-11-30 05:10:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:10:52,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:10:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:10:52,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 05:10:52,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-30 05:10:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:10:53,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 2343 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-30 05:10:53,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:10:53,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-30 05:10:53,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:53,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:53,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:53,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:53,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:53,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-30 05:10:54,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-30 05:10:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 1845 trivial. 0 not checked. [2023-11-30 05:10:54,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:11:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 1845 trivial. 0 not checked. [2023-11-30 05:11:36,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744612155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:11:36,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:11:36,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 12 [2023-11-30 05:11:36,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481948204] [2023-11-30 05:11:36,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:11:36,152 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-30 05:11:36,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:11:36,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-30 05:11:36,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2023-11-30 05:11:36,153 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 187 [2023-11-30 05:11:36,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 572 transitions, 10101 flow. Second operand has 13 states, 13 states have (on average 111.38461538461539) internal successors, (1448), 13 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:36,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:11:36,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 187 [2023-11-30 05:11:36,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:11:36,858 INFO L124 PetriNetUnfolderBase]: 317/1612 cut-off events. [2023-11-30 05:11:36,858 INFO L125 PetriNetUnfolderBase]: For 24908/25867 co-relation queries the response was YES. [2023-11-30 05:11:36,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12763 conditions, 1612 events. 317/1612 cut-off events. For 24908/25867 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7938 event pairs, 200 based on Foata normal form. 21/1609 useless extension candidates. Maximal degree in co-relation 8414. Up to 691 conditions per place. [2023-11-30 05:11:36,891 INFO L140 encePairwiseOnDemand]: 177/187 looper letters, 286 selfloop transitions, 46 changer transitions 13/620 dead transitions. [2023-11-30 05:11:36,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 620 transitions, 11813 flow [2023-11-30 05:11:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-30 05:11:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-30 05:11:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 717 transitions. [2023-11-30 05:11:36,892 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6390374331550802 [2023-11-30 05:11:36,892 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 717 transitions. [2023-11-30 05:11:36,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 717 transitions. [2023-11-30 05:11:36,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:11:36,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 717 transitions. [2023-11-30 05:11:36,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 119.5) internal successors, (717), 6 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:36,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:36,894 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:36,894 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 378 predicate places. [2023-11-30 05:11:36,894 INFO L500 AbstractCegarLoop]: Abstraction has has 564 places, 620 transitions, 11813 flow [2023-11-30 05:11:36,895 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 111.38461538461539) internal successors, (1448), 13 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:36,895 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:11:36,895 INFO L232 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:11:36,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-30 05:11:37,103 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:11:37,103 INFO L425 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 05:11:37,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:11:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1016426432, now seen corresponding path program 1 times [2023-11-30 05:11:37,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:11:37,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261742869] [2023-11-30 05:11:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:11:37,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:11:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:11:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1536 proven. 544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:11:39,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:11:39,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261742869] [2023-11-30 05:11:39,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261742869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:11:39,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080879038] [2023-11-30 05:11:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:11:39,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:11:39,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:11:39,020 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-30 05:11:39,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-30 05:11:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:11:39,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 2378 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-30 05:11:39,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:11:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1926 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:11:42,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:11:42,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-30 05:11:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1926 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:11:43,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080879038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:11:43,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:11:43,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2023-11-30 05:11:43,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240497795] [2023-11-30 05:11:43,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:11:43,797 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-30 05:11:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:11:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-30 05:11:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=4508, Unknown=0, NotChecked=0, Total=5256 [2023-11-30 05:11:43,803 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 187 [2023-11-30 05:11:43,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 620 transitions, 11813 flow. Second operand has 73 states, 73 states have (on average 118.87671232876713) internal successors, (8678), 73 states have internal predecessors, (8678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:43,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:11:43,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 187 [2023-11-30 05:11:43,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:11:45,855 INFO L124 PetriNetUnfolderBase]: 517/2181 cut-off events. [2023-11-30 05:11:45,855 INFO L125 PetriNetUnfolderBase]: For 40912/42765 co-relation queries the response was YES. [2023-11-30 05:11:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18405 conditions, 2181 events. 517/2181 cut-off events. For 40912/42765 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13371 event pairs, 105 based on Foata normal form. 2/2142 useless extension candidates. Maximal degree in co-relation 13880. Up to 997 conditions per place. [2023-11-30 05:11:45,871 INFO L140 encePairwiseOnDemand]: 168/187 looper letters, 303 selfloop transitions, 55 changer transitions 27/728 dead transitions. [2023-11-30 05:11:45,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 728 transitions, 15155 flow [2023-11-30 05:11:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-30 05:11:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-30 05:11:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4722 transitions. [2023-11-30 05:11:45,874 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.631283422459893 [2023-11-30 05:11:45,874 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4722 transitions. [2023-11-30 05:11:45,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4722 transitions. [2023-11-30 05:11:45,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:11:45,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4722 transitions. [2023-11-30 05:11:45,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 118.05) internal successors, (4722), 40 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:45,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 187.0) internal successors, (7667), 41 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:45,883 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 187.0) internal successors, (7667), 41 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:45,883 INFO L307 CegarLoopForPetriNet]: 186 programPoint places, 417 predicate places. [2023-11-30 05:11:45,883 INFO L500 AbstractCegarLoop]: Abstraction has has 603 places, 728 transitions, 15155 flow [2023-11-30 05:11:45,884 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 118.87671232876713) internal successors, (8678), 73 states have internal predecessors, (8678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:11:45,884 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:11:45,884 INFO L232 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:11:45,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-30 05:11:46,093 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-30 05:11:46,093 INFO L425 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-30 05:11:46,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:11:46,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1444448094, now seen corresponding path program 1 times [2023-11-30 05:11:46,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:11:46,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907011784] [2023-11-30 05:11:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:11:46,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:11:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-11-30 05:11:58,382 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-30 05:11:58,393 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-30 05:11:58,394 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Termination requested (timeout or resource limit) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:152) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:869) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:793) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:283) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:296) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:219) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:148) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-30 05:11:58,397 INFO L158 Benchmark]: Toolchain (without parser) took 862445.55ms. Allocated memory was 314.6MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 262.3MB in the beginning and 704.0MB in the end (delta: -441.7MB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. [2023-11-30 05:11:58,397 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 314.6MB. Free memory is still 270.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-11-30 05:11:58,397 INFO L158 Benchmark]: CACSL2BoogieTranslator took 468.68ms. Allocated memory was 314.6MB in the beginning and 459.3MB in the end (delta: 144.7MB). Free memory was 262.3MB in the beginning and 427.7MB in the end (delta: -165.4MB). Peak memory consumption was 47.6MB. Max. memory is 16.0GB. [2023-11-30 05:11:58,397 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.98ms. Allocated memory is still 459.3MB. Free memory was 427.7MB in the beginning and 424.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-11-30 05:11:58,397 INFO L158 Benchmark]: Boogie Preprocessor took 19.31ms. Allocated memory is still 459.3MB. Free memory was 424.6MB in the beginning and 422.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-11-30 05:11:58,397 INFO L158 Benchmark]: RCFGBuilder took 384.79ms. Allocated memory is still 459.3MB. Free memory was 422.5MB in the beginning and 394.1MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-11-30 05:11:58,398 INFO L158 Benchmark]: TraceAbstraction took 861537.26ms. Allocated memory was 459.3MB in the beginning and 1.6GB in the end (delta: 1.2GB). Free memory was 393.1MB in the beginning and 704.0MB in the end (delta: -310.9MB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. [2023-11-30 05:11:58,401 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 314.6MB. Free memory is still 270.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 468.68ms. Allocated memory was 314.6MB in the beginning and 459.3MB in the end (delta: 144.7MB). Free memory was 262.3MB in the beginning and 427.7MB in the end (delta: -165.4MB). Peak memory consumption was 47.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.98ms. Allocated memory is still 459.3MB. Free memory was 427.7MB in the beginning and 424.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.31ms. Allocated memory is still 459.3MB. Free memory was 424.6MB in the beginning and 422.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 384.79ms. Allocated memory is still 459.3MB. Free memory was 422.5MB in the beginning and 394.1MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 861537.26ms. Allocated memory was 459.3MB in the beginning and 1.6GB in the end (delta: 1.2GB). Free memory was 393.1MB in the beginning and 704.0MB in the end (delta: -310.9MB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Termination requested (timeout or resource limit) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Termination requested (timeout or resource limit): de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown