/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:13:42,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:13:42,816 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:13:42,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:13:42,846 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:13:42,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:13:42,846 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:13:42,847 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:13:42,847 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:13:42,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:13:42,850 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:13:42,850 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:13:42,851 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:13:42,851 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:13:42,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:13:42,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:13:42,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:13:42,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:13:42,852 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:13:42,852 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:13:42,852 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:13:42,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:13:42,853 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:13:42,853 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:13:42,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:13:42,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:13:42,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:13:42,855 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:13:42,855 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:13:42,855 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:13:42,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:13:42,856 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:13:42,856 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:13:42,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:13:43,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:13:43,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:13:43,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:13:43,084 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:13:43,085 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:13:43,086 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-12-05 21:13:44,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:13:44,362 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:13:44,363 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_06-cond_racing1.i [2023-12-05 21:13:44,387 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12ff772e1/06beba7ddc8c471992af43d38da6eef3/FLAG859c4c576 [2023-12-05 21:13:44,400 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12ff772e1/06beba7ddc8c471992af43d38da6eef3 [2023-12-05 21:13:44,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:13:44,403 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:13:44,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:13:44,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:13:44,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:13:44,415 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,416 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c7a2e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44, skipping insertion in model container [2023-12-05 21:13:44,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,457 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:13:44,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:13:44,802 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:13:44,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:13:44,899 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:13:44,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44 WrapperNode [2023-12-05 21:13:44,900 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:13:44,901 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:13:44,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:13:44,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:13:44,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,926 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,942 INFO L138 Inliner]: procedures = 271, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 99 [2023-12-05 21:13:44,942 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:13:44,943 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:13:44,943 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:13:44,943 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:13:44,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,961 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,964 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,965 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,968 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:13:44,969 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:13:44,969 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:13:44,969 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:13:44,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (1/1) ... [2023-12-05 21:13:44,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:13:44,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:13:44,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:13:45,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:13:45,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:13:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:13:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:13:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:13:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:13:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:13:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:13:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:13:45,027 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:13:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:13:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:13:45,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:13:45,028 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:13:45,119 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:13:45,120 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:13:45,292 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:13:45,344 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:13:45,344 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-12-05 21:13:45,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:13:45 BoogieIcfgContainer [2023-12-05 21:13:45,345 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:13:45,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:13:45,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:13:45,349 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:13:45,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:13:44" (1/3) ... [2023-12-05 21:13:45,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e14bc8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:13:45, skipping insertion in model container [2023-12-05 21:13:45,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:13:44" (2/3) ... [2023-12-05 21:13:45,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e14bc8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:13:45, skipping insertion in model container [2023-12-05 21:13:45,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:13:45" (3/3) ... [2023-12-05 21:13:45,351 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2023-12-05 21:13:45,364 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:13:45,364 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-12-05 21:13:45,364 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:13:45,401 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-05 21:13:45,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 136 transitions, 279 flow [2023-12-05 21:13:45,498 INFO L124 PetriNetUnfolderBase]: 25/193 cut-off events. [2023-12-05 21:13:45,498 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-05 21:13:45,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 193 events. 25/193 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 543 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2023-12-05 21:13:45,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 136 transitions, 279 flow [2023-12-05 21:13:45,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 136 transitions, 279 flow [2023-12-05 21:13:45,514 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:13:45,518 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;@446c15d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:13:45,518 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-05 21:13:45,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:13:45,527 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2023-12-05 21:13:45,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:13:45,527 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:45,540 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:45,541 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:45,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash 900065039, now seen corresponding path program 1 times [2023-12-05 21:13:45,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:45,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154916387] [2023-12-05 21:13:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:45,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154916387] [2023-12-05 21:13:45,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154916387] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:45,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:45,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:13:45,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417402096] [2023-12-05 21:13:45,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:45,836 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:13:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:45,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:13:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:13:45,864 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 136 [2023-12-05 21:13:45,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 136 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:45,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:45,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 136 [2023-12-05 21:13:45,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:46,025 INFO L124 PetriNetUnfolderBase]: 73/453 cut-off events. [2023-12-05 21:13:46,026 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-12-05 21:13:46,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 453 events. 73/453 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2691 event pairs, 48 based on Foata normal form. 79/484 useless extension candidates. Maximal degree in co-relation 513. Up to 121 conditions per place. [2023-12-05 21:13:46,033 INFO L140 encePairwiseOnDemand]: 120/136 looper letters, 23 selfloop transitions, 1 changer transitions 17/125 dead transitions. [2023-12-05 21:13:46,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 125 transitions, 323 flow [2023-12-05 21:13:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:13:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:13:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-12-05 21:13:46,050 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.821078431372549 [2023-12-05 21:13:46,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-12-05 21:13:46,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-12-05 21:13:46,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:46,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-12-05 21:13:46,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:46,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:46,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:46,071 INFO L308 CegarLoopForPetriNet]: 123 programPoint places, -3 predicate places. [2023-12-05 21:13:46,071 INFO L500 AbstractCegarLoop]: Abstraction has has 120 places, 125 transitions, 323 flow [2023-12-05 21:13:46,072 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:46,072 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:46,072 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:46,072 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:13:46,073 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:46,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash 900065040, now seen corresponding path program 1 times [2023-12-05 21:13:46,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:46,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936620681] [2023-12-05 21:13:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:46,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:46,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:46,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936620681] [2023-12-05 21:13:46,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936620681] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:46,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:46,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:13:46,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386537457] [2023-12-05 21:13:46,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:46,239 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:13:46,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:46,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:13:46,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:13:46,240 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 136 [2023-12-05 21:13:46,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 125 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:46,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:46,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 136 [2023-12-05 21:13:46,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:46,366 INFO L124 PetriNetUnfolderBase]: 117/548 cut-off events. [2023-12-05 21:13:46,366 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-12-05 21:13:46,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 548 events. 117/548 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3068 event pairs, 6 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 877. Up to 174 conditions per place. [2023-12-05 21:13:46,371 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 34 selfloop transitions, 3 changer transitions 17/139 dead transitions. [2023-12-05 21:13:46,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 139 transitions, 481 flow [2023-12-05 21:13:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:13:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:13:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 404 transitions. [2023-12-05 21:13:46,374 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7426470588235294 [2023-12-05 21:13:46,374 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 404 transitions. [2023-12-05 21:13:46,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 404 transitions. [2023-12-05 21:13:46,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:46,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 404 transitions. [2023-12-05 21:13:46,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:46,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:46,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:46,379 INFO L308 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2023-12-05 21:13:46,379 INFO L500 AbstractCegarLoop]: Abstraction has has 123 places, 139 transitions, 481 flow [2023-12-05 21:13:46,380 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:46,380 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:46,380 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:46,380 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:13:46,381 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:46,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:46,382 INFO L85 PathProgramCache]: Analyzing trace with hash -789545811, now seen corresponding path program 1 times [2023-12-05 21:13:46,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:46,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133040512] [2023-12-05 21:13:46,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:46,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:46,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:46,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133040512] [2023-12-05 21:13:46,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133040512] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:13:46,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444638894] [2023-12-05 21:13:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:46,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:13:46,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:13:46,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:13:46,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:13:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:46,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-05 21:13:46,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:13:46,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:13:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:46,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:13:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:46,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444638894] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:13:46,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:13:46,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-12-05 21:13:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755105446] [2023-12-05 21:13:46,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:13:46,998 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-05 21:13:46,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:46,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-05 21:13:46,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-05 21:13:47,001 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 136 [2023-12-05 21:13:47,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 481 flow. Second operand has 14 states, 14 states have (on average 90.57142857142857) internal successors, (1268), 14 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:47,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 136 [2023-12-05 21:13:47,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:47,159 INFO L124 PetriNetUnfolderBase]: 30/188 cut-off events. [2023-12-05 21:13:47,159 INFO L125 PetriNetUnfolderBase]: For 122/142 co-relation queries the response was YES. [2023-12-05 21:13:47,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 188 events. 30/188 cut-off events. For 122/142 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 539 event pairs, 6 based on Foata normal form. 3/187 useless extension candidates. Maximal degree in co-relation 318. Up to 46 conditions per place. [2023-12-05 21:13:47,160 INFO L140 encePairwiseOnDemand]: 129/136 looper letters, 35 selfloop transitions, 5 changer transitions 0/92 dead transitions. [2023-12-05 21:13:47,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 92 transitions, 416 flow [2023-12-05 21:13:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:13:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:13:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 658 transitions. [2023-12-05 21:13:47,161 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6911764705882353 [2023-12-05 21:13:47,161 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 658 transitions. [2023-12-05 21:13:47,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 658 transitions. [2023-12-05 21:13:47,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:47,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 658 transitions. [2023-12-05 21:13:47,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.0) internal successors, (658), 7 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,165 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,166 INFO L308 CegarLoopForPetriNet]: 123 programPoint places, -37 predicate places. [2023-12-05 21:13:47,166 INFO L500 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 416 flow [2023-12-05 21:13:47,167 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 90.57142857142857) internal successors, (1268), 14 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,167 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:47,167 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:47,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-05 21:13:47,373 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:13:47,374 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:47,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1293883984, now seen corresponding path program 1 times [2023-12-05 21:13:47,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:47,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92526116] [2023-12-05 21:13:47,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:13:47,404 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:13:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:13:47,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:13:47,433 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:13:47,434 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-05 21:13:47,436 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-12-05 21:13:47,436 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-12-05 21:13:47,436 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-12-05 21:13:47,436 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-12-05 21:13:47,436 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:13:47,437 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-05 21:13:47,438 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:13:47,438 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:13:47,461 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:13:47,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 169 transitions, 354 flow [2023-12-05 21:13:47,491 INFO L124 PetriNetUnfolderBase]: 43/311 cut-off events. [2023-12-05 21:13:47,491 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-05 21:13:47,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 311 events. 43/311 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1062 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-12-05 21:13:47,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 169 transitions, 354 flow [2023-12-05 21:13:47,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 169 transitions, 354 flow [2023-12-05 21:13:47,497 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:13:47,498 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;@446c15d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:13:47,498 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-05 21:13:47,500 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:13:47,500 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2023-12-05 21:13:47,501 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:13:47,501 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:47,501 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:47,502 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:47,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1843716721, now seen corresponding path program 1 times [2023-12-05 21:13:47,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:47,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938075130] [2023-12-05 21:13:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:47,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938075130] [2023-12-05 21:13:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938075130] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:47,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:47,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:13:47,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889208179] [2023-12-05 21:13:47,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:47,558 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:13:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:13:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:13:47,559 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 169 [2023-12-05 21:13:47,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 169 transitions, 354 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:47,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 169 [2023-12-05 21:13:47,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:47,908 INFO L124 PetriNetUnfolderBase]: 1122/3750 cut-off events. [2023-12-05 21:13:47,908 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-12-05 21:13:47,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5627 conditions, 3750 events. 1122/3750 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 35252 event pairs, 786 based on Foata normal form. 970/4357 useless extension candidates. Maximal degree in co-relation 749. Up to 1341 conditions per place. [2023-12-05 21:13:47,925 INFO L140 encePairwiseOnDemand]: 147/169 looper letters, 31 selfloop transitions, 1 changer transitions 17/158 dead transitions. [2023-12-05 21:13:47,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 158 transitions, 426 flow [2023-12-05 21:13:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:13:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:13:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-12-05 21:13:47,927 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8244575936883629 [2023-12-05 21:13:47,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-12-05 21:13:47,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-12-05 21:13:47,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:47,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-12-05 21:13:47,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,929 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,930 INFO L308 CegarLoopForPetriNet]: 151 programPoint places, -3 predicate places. [2023-12-05 21:13:47,930 INFO L500 AbstractCegarLoop]: Abstraction has has 148 places, 158 transitions, 426 flow [2023-12-05 21:13:47,930 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,930 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:47,930 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:47,930 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:13:47,930 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:47,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:47,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1843716720, now seen corresponding path program 1 times [2023-12-05 21:13:47,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:47,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238785079] [2023-12-05 21:13:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:47,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:47,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:47,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238785079] [2023-12-05 21:13:47,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238785079] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:47,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:47,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:13:47,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96727129] [2023-12-05 21:13:47,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:47,980 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:13:47,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:47,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:13:47,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:13:47,981 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 169 [2023-12-05 21:13:47,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 158 transitions, 426 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:47,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:47,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 169 [2023-12-05 21:13:47,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:48,543 INFO L124 PetriNetUnfolderBase]: 1700/4889 cut-off events. [2023-12-05 21:13:48,544 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2023-12-05 21:13:48,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9736 conditions, 4889 events. 1700/4889 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 44284 event pairs, 570 based on Foata normal form. 0/4325 useless extension candidates. Maximal degree in co-relation 1249. Up to 2193 conditions per place. [2023-12-05 21:13:48,567 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 44 selfloop transitions, 3 changer transitions 29/180 dead transitions. [2023-12-05 21:13:48,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 180 transitions, 656 flow [2023-12-05 21:13:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:13:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:13:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 496 transitions. [2023-12-05 21:13:48,569 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7337278106508875 [2023-12-05 21:13:48,569 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 496 transitions. [2023-12-05 21:13:48,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 496 transitions. [2023-12-05 21:13:48,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:48,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 496 transitions. [2023-12-05 21:13:48,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:48,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:48,571 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:48,573 INFO L308 CegarLoopForPetriNet]: 151 programPoint places, 0 predicate places. [2023-12-05 21:13:48,573 INFO L500 AbstractCegarLoop]: Abstraction has has 151 places, 180 transitions, 656 flow [2023-12-05 21:13:48,574 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:48,574 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:48,574 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:48,574 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:13:48,574 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:48,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:48,574 INFO L85 PathProgramCache]: Analyzing trace with hash -211492978, now seen corresponding path program 1 times [2023-12-05 21:13:48,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:48,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573816820] [2023-12-05 21:13:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:48,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:48,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:48,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573816820] [2023-12-05 21:13:48,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573816820] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:13:48,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314000012] [2023-12-05 21:13:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:48,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:13:48,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:13:48,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:13:48,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:13:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:48,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-05 21:13:48,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:13:48,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:13:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:48,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:13:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:48,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314000012] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:13:48,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:13:48,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-12-05 21:13:48,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435637833] [2023-12-05 21:13:48,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:13:48,965 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-05 21:13:48,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:48,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-05 21:13:48,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-05 21:13:48,978 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 169 [2023-12-05 21:13:48,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 180 transitions, 656 flow. Second operand has 14 states, 14 states have (on average 109.57142857142857) internal successors, (1534), 14 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:48,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:48,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 169 [2023-12-05 21:13:48,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:49,231 INFO L124 PetriNetUnfolderBase]: 492/1305 cut-off events. [2023-12-05 21:13:49,232 INFO L125 PetriNetUnfolderBase]: For 1076/1226 co-relation queries the response was YES. [2023-12-05 21:13:49,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3567 conditions, 1305 events. 492/1305 cut-off events. For 1076/1226 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8528 event pairs, 0 based on Foata normal form. 3/1283 useless extension candidates. Maximal degree in co-relation 468. Up to 753 conditions per place. [2023-12-05 21:13:49,239 INFO L140 encePairwiseOnDemand]: 162/169 looper letters, 80 selfloop transitions, 8 changer transitions 0/159 dead transitions. [2023-12-05 21:13:49,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 159 transitions, 834 flow [2023-12-05 21:13:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-05 21:13:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-12-05 21:13:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1162 transitions. [2023-12-05 21:13:49,242 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6875739644970414 [2023-12-05 21:13:49,242 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1162 transitions. [2023-12-05 21:13:49,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1162 transitions. [2023-12-05 21:13:49,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:49,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1162 transitions. [2023-12-05 21:13:49,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.2) internal successors, (1162), 10 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:49,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 169.0) internal successors, (1859), 11 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:49,246 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 169.0) internal successors, (1859), 11 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:49,247 INFO L308 CegarLoopForPetriNet]: 151 programPoint places, -34 predicate places. [2023-12-05 21:13:49,247 INFO L500 AbstractCegarLoop]: Abstraction has has 117 places, 159 transitions, 834 flow [2023-12-05 21:13:49,247 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.57142857142857) internal successors, (1534), 14 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:49,247 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:49,248 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2023-12-05 21:13:49,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-05 21:13:49,452 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,SelfDestructingSolverStorable6 [2023-12-05 21:13:49,453 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:49,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:49,454 INFO L85 PathProgramCache]: Analyzing trace with hash -987661734, now seen corresponding path program 1 times [2023-12-05 21:13:49,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:49,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605868594] [2023-12-05 21:13:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:49,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:13:49,470 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:13:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:13:49,486 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:13:49,488 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:13:49,488 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-05 21:13:49,489 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-12-05 21:13:49,490 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-12-05 21:13:49,490 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-12-05 21:13:49,491 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-12-05 21:13:49,491 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:13:49,491 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-05 21:13:49,492 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:13:49,492 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:13:49,514 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-05 21:13:49,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 202 transitions, 431 flow [2023-12-05 21:13:49,575 INFO L124 PetriNetUnfolderBase]: 66/468 cut-off events. [2023-12-05 21:13:49,575 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-12-05 21:13:49,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 468 events. 66/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1765 event pairs, 1 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 319. Up to 16 conditions per place. [2023-12-05 21:13:49,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 202 transitions, 431 flow [2023-12-05 21:13:49,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 202 transitions, 431 flow [2023-12-05 21:13:49,581 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:13:49,581 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;@446c15d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:13:49,581 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-05 21:13:49,583 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:13:49,583 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2023-12-05 21:13:49,583 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:13:49,584 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:49,584 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:49,584 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:49,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1133267313, now seen corresponding path program 1 times [2023-12-05 21:13:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:49,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399776051] [2023-12-05 21:13:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:49,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:49,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399776051] [2023-12-05 21:13:49,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399776051] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:49,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:49,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:13:49,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53150626] [2023-12-05 21:13:49,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:49,619 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:13:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:13:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:13:49,620 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 202 [2023-12-05 21:13:49,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 202 transitions, 431 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:49,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:49,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 202 [2023-12-05 21:13:49,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:52,821 INFO L124 PetriNetUnfolderBase]: 12842/32102 cut-off events. [2023-12-05 21:13:52,822 INFO L125 PetriNetUnfolderBase]: For 925/925 co-relation queries the response was YES. [2023-12-05 21:13:52,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50713 conditions, 32102 events. 12842/32102 cut-off events. For 925/925 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 373110 event pairs, 9043 based on Foata normal form. 10178/39586 useless extension candidates. Maximal degree in co-relation 5616. Up to 13148 conditions per place. [2023-12-05 21:13:52,996 INFO L140 encePairwiseOnDemand]: 174/202 looper letters, 39 selfloop transitions, 1 changer transitions 23/191 dead transitions. [2023-12-05 21:13:52,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 191 transitions, 531 flow [2023-12-05 21:13:52,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:13:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:13:52,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-12-05 21:13:52,998 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8267326732673267 [2023-12-05 21:13:52,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-12-05 21:13:52,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-12-05 21:13:52,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:52,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-12-05 21:13:53,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:53,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:53,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:53,002 INFO L308 CegarLoopForPetriNet]: 179 programPoint places, -3 predicate places. [2023-12-05 21:13:53,002 INFO L500 AbstractCegarLoop]: Abstraction has has 176 places, 191 transitions, 531 flow [2023-12-05 21:13:53,002 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:53,002 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:53,002 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:53,002 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:13:53,002 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:53,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1133267312, now seen corresponding path program 1 times [2023-12-05 21:13:53,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:53,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189672018] [2023-12-05 21:13:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:53,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:53,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189672018] [2023-12-05 21:13:53,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189672018] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:13:53,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:13:53,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:13:53,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840544069] [2023-12-05 21:13:53,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:13:53,053 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:13:53,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:13:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:13:53,054 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 202 [2023-12-05 21:13:53,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 191 transitions, 531 flow. Second operand has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:53,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:53,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 202 [2023-12-05 21:13:53,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:13:57,181 INFO L124 PetriNetUnfolderBase]: 17746/43195 cut-off events. [2023-12-05 21:13:57,182 INFO L125 PetriNetUnfolderBase]: For 7454/8772 co-relation queries the response was YES. [2023-12-05 21:13:57,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91420 conditions, 43195 events. 17746/43195 cut-off events. For 7454/8772 co-relation queries the response was YES. Maximal size of possible extension queue 1324. Compared 507401 event pairs, 8953 based on Foata normal form. 0/40685 useless extension candidates. Maximal degree in co-relation 9905. Up to 21545 conditions per place. [2023-12-05 21:13:57,474 INFO L140 encePairwiseOnDemand]: 196/202 looper letters, 52 selfloop transitions, 3 changer transitions 41/219 dead transitions. [2023-12-05 21:13:57,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 219 transitions, 825 flow [2023-12-05 21:13:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:13:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:13:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 586 transitions. [2023-12-05 21:13:57,478 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7252475247524752 [2023-12-05 21:13:57,479 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 586 transitions. [2023-12-05 21:13:57,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 586 transitions. [2023-12-05 21:13:57,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:13:57,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 586 transitions. [2023-12-05 21:13:57,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:57,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:57,481 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:57,482 INFO L308 CegarLoopForPetriNet]: 179 programPoint places, 0 predicate places. [2023-12-05 21:13:57,482 INFO L500 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 825 flow [2023-12-05 21:13:57,483 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:13:57,483 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:13:57,483 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:13:57,483 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:13:57,483 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:13:57,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:13:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash 754076047, now seen corresponding path program 1 times [2023-12-05 21:13:57,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:13:57,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557315917] [2023-12-05 21:13:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:57,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:13:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:57,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:13:57,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557315917] [2023-12-05 21:13:57,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557315917] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:13:57,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642262780] [2023-12-05 21:13:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:13:57,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:13:57,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:13:57,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:13:57,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-05 21:13:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:13:57,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-05 21:13:57,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:13:57,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:13:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:57,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:13:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:13:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642262780] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:13:57,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:13:57,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:13:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404900918] [2023-12-05 21:13:57,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:13:57,790 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-05 21:13:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:13:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-05 21:13:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:13:57,792 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 202 [2023-12-05 21:13:57,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 825 flow. Second operand has 11 states, 11 states have (on average 128.72727272727272) internal successors, (1416), 11 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) [2023-12-05 21:13:57,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:13:57,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 202 [2023-12-05 21:13:57,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:02,112 INFO L124 PetriNetUnfolderBase]: 19446/42573 cut-off events. [2023-12-05 21:14:02,113 INFO L125 PetriNetUnfolderBase]: For 22196/25886 co-relation queries the response was YES. [2023-12-05 21:14:02,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118358 conditions, 42573 events. 19446/42573 cut-off events. For 22196/25886 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 461493 event pairs, 623 based on Foata normal form. 3/38628 useless extension candidates. Maximal degree in co-relation 12589. Up to 22293 conditions per place. [2023-12-05 21:14:02,400 INFO L140 encePairwiseOnDemand]: 192/202 looper letters, 121 selfloop transitions, 11 changer transitions 41/295 dead transitions. [2023-12-05 21:14:02,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 295 transitions, 1603 flow [2023-12-05 21:14:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-05 21:14:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-12-05 21:14:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1416 transitions. [2023-12-05 21:14:02,404 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.700990099009901 [2023-12-05 21:14:02,404 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1416 transitions. [2023-12-05 21:14:02,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1416 transitions. [2023-12-05 21:14:02,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:02,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1416 transitions. [2023-12-05 21:14:02,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.6) internal successors, (1416), 10 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) [2023-12-05 21:14:02,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 202.0) internal successors, (2222), 11 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:02,409 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 202.0) internal successors, (2222), 11 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:02,410 INFO L308 CegarLoopForPetriNet]: 179 programPoint places, 9 predicate places. [2023-12-05 21:14:02,410 INFO L500 AbstractCegarLoop]: Abstraction has has 188 places, 295 transitions, 1603 flow [2023-12-05 21:14:02,411 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 128.72727272727272) internal successors, (1416), 11 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) [2023-12-05 21:14:02,411 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:02,411 INFO L233 CegarLoopForPetriNet]: trace histogram [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] [2023-12-05 21:14:02,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-05 21:14:02,615 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:02,616 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:14:02,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1518832379, now seen corresponding path program 1 times [2023-12-05 21:14:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:02,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164988621] [2023-12-05 21:14:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:02,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-05 21:14:02,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:02,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164988621] [2023-12-05 21:14:02,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164988621] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:14:02,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766793190] [2023-12-05 21:14:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:02,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:14:02,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:14:02,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-05 21:14:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:02,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-05 21:14:02,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:14:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:02,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:14:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:02,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766793190] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:14:02,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:14:02,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2023-12-05 21:14:02,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283840029] [2023-12-05 21:14:02,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:14:02,899 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-05 21:14:02,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:02,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-05 21:14:02,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-12-05 21:14:02,901 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 202 [2023-12-05 21:14:02,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 295 transitions, 1603 flow. Second operand has 17 states, 17 states have (on average 123.29411764705883) internal successors, (2096), 17 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:02,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:02,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 202 [2023-12-05 21:14:02,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:04,289 INFO L124 PetriNetUnfolderBase]: 6372/12072 cut-off events. [2023-12-05 21:14:04,290 INFO L125 PetriNetUnfolderBase]: For 13818/15969 co-relation queries the response was YES. [2023-12-05 21:14:04,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46779 conditions, 12072 events. 6372/12072 cut-off events. For 13818/15969 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 100176 event pairs, 216 based on Foata normal form. 368/12016 useless extension candidates. Maximal degree in co-relation 4985. Up to 8691 conditions per place. [2023-12-05 21:14:04,382 INFO L140 encePairwiseOnDemand]: 196/202 looper letters, 162 selfloop transitions, 11 changer transitions 0/263 dead transitions. [2023-12-05 21:14:04,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 263 transitions, 1896 flow [2023-12-05 21:14:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-05 21:14:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-12-05 21:14:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1717 transitions. [2023-12-05 21:14:04,386 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2023-12-05 21:14:04,386 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1717 transitions. [2023-12-05 21:14:04,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1717 transitions. [2023-12-05 21:14:04,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:04,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1717 transitions. [2023-12-05 21:14:04,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 132.07692307692307) internal successors, (1717), 13 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:04,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 202.0) internal successors, (2828), 14 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:04,402 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 202.0) internal successors, (2828), 14 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:04,403 INFO L308 CegarLoopForPetriNet]: 179 programPoint places, -21 predicate places. [2023-12-05 21:14:04,403 INFO L500 AbstractCegarLoop]: Abstraction has has 158 places, 263 transitions, 1896 flow [2023-12-05 21:14:04,403 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 123.29411764705883) internal successors, (2096), 17 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:04,404 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:04,404 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:04,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-05 21:14:04,607 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:04,608 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:14:04,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash 868433898, now seen corresponding path program 1 times [2023-12-05 21:14:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:04,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189262725] [2023-12-05 21:14:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:04,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:04,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:04,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189262725] [2023-12-05 21:14:04,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189262725] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:14:04,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780897142] [2023-12-05 21:14:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:04,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:04,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:14:04,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:14:04,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-05 21:14:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:04,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-05 21:14:04,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:14:04,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:14:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:05,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:14:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780897142] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:14:05,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:14:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-12-05 21:14:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180392601] [2023-12-05 21:14:05,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:14:05,286 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-05 21:14:05,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-05 21:14:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-12-05 21:14:05,289 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 202 [2023-12-05 21:14:05,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 263 transitions, 1896 flow. Second operand has 27 states, 27 states have (on average 128.66666666666666) internal successors, (3474), 27 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:05,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:05,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 202 [2023-12-05 21:14:05,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:07,164 INFO L124 PetriNetUnfolderBase]: 5490/10534 cut-off events. [2023-12-05 21:14:07,164 INFO L125 PetriNetUnfolderBase]: For 17986/20054 co-relation queries the response was YES. [2023-12-05 21:14:07,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48236 conditions, 10534 events. 5490/10534 cut-off events. For 17986/20054 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 86941 event pairs, 216 based on Foata normal form. 750/11251 useless extension candidates. Maximal degree in co-relation 5352. Up to 7466 conditions per place. [2023-12-05 21:14:07,269 INFO L140 encePairwiseOnDemand]: 196/202 looper letters, 161 selfloop transitions, 11 changer transitions 0/262 dead transitions. [2023-12-05 21:14:07,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 262 transitions, 2230 flow [2023-12-05 21:14:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-05 21:14:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-12-05 21:14:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1793 transitions. [2023-12-05 21:14:07,273 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6827875095201827 [2023-12-05 21:14:07,273 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1793 transitions. [2023-12-05 21:14:07,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1793 transitions. [2023-12-05 21:14:07,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:07,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1793 transitions. [2023-12-05 21:14:07,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:07,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 202.0) internal successors, (2828), 14 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:07,280 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 202.0) internal successors, (2828), 14 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:07,281 INFO L308 CegarLoopForPetriNet]: 179 programPoint places, -10 predicate places. [2023-12-05 21:14:07,281 INFO L500 AbstractCegarLoop]: Abstraction has has 169 places, 262 transitions, 2230 flow [2023-12-05 21:14:07,282 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 128.66666666666666) internal successors, (3474), 27 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:07,282 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:07,282 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:07,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-05 21:14:07,486 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,SelfDestructingSolverStorable12 [2023-12-05 21:14:07,486 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:14:07,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1151647844, now seen corresponding path program 1 times [2023-12-05 21:14:07,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:07,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786420205] [2023-12-05 21:14:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:07,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:14:07,505 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:14:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:14:07,524 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:14:07,525 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:14:07,525 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-05 21:14:07,525 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-12-05 21:14:07,525 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-12-05 21:14:07,525 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-12-05 21:14:07,525 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 5 remaining) [2023-12-05 21:14:07,525 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-05 21:14:07,526 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-12-05 21:14:07,527 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:14:07,527 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-05 21:14:07,547 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-12-05 21:14:07,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 235 transitions, 510 flow [2023-12-05 21:14:07,608 INFO L124 PetriNetUnfolderBase]: 101/705 cut-off events. [2023-12-05 21:14:07,608 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-12-05 21:14:07,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 705 events. 101/705 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2978 event pairs, 6 based on Foata normal form. 0/562 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-12-05 21:14:07,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 235 transitions, 510 flow [2023-12-05 21:14:07,617 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 235 transitions, 510 flow [2023-12-05 21:14:07,619 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:14:07,620 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;@446c15d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:14:07,620 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-05 21:14:07,622 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:14:07,622 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2023-12-05 21:14:07,622 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:14:07,622 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:07,622 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:07,622 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-05 21:14:07,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1263554033, now seen corresponding path program 1 times [2023-12-05 21:14:07,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:07,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859135851] [2023-12-05 21:14:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:07,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:07,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:07,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859135851] [2023-12-05 21:14:07,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859135851] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:14:07,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:14:07,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:14:07,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480102329] [2023-12-05 21:14:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:14:07,648 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:14:07,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:14:07,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:14:07,649 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 235 [2023-12-05 21:14:07,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 235 transitions, 510 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:14:07,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:07,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 235 [2023-12-05 21:14:07,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:41,450 INFO L124 PetriNetUnfolderBase]: 130164/273016 cut-off events. [2023-12-05 21:14:41,450 INFO L125 PetriNetUnfolderBase]: For 10376/10376 co-relation queries the response was YES. [2023-12-05 21:14:43,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447696 conditions, 273016 events. 130164/273016 cut-off events. For 10376/10376 co-relation queries the response was YES. Maximal size of possible extension queue 8165. Compared 3596646 event pairs, 90828 based on Foata normal form. 98486/351497 useless extension candidates. Maximal degree in co-relation 50726. Up to 121191 conditions per place.