/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 05:21:42,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 05:21:42,875 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-VariableLbe.epf [2023-08-27 05:21:42,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 05:21:42,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 05:21:42,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 05:21:42,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 05:21:42,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 05:21:42,906 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 05:21:42,910 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 05:21:42,910 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 05:21:42,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 05:21:42,911 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 05:21:42,912 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 05:21:42,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 05:21:42,912 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 05:21:42,912 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 05:21:42,912 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 05:21:42,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 05:21:42,912 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 05:21:42,913 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 05:21:42,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 05:21:42,913 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 05:21:42,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 05:21:42,914 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 05:21:42,914 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 05:21:42,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 05:21:42,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:21:42,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 05:21:42,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 05:21:42,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 05:21:42,916 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 05:21:42,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 05:21:42,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 05:21:42,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 05:21:42,917 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 05:21:43,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 05:21:43,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 05:21:43,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 05:21:43,159 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 05:21:43,159 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 05:21:43,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-27 05:21:44,056 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 05:21:44,322 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 05:21:44,322 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-27 05:21:44,336 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9ceb92e/7bcd79c4970b4cacae3c89b483ddad32/FLAGdfe8affbc [2023-08-27 05:21:44,344 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9ceb92e/7bcd79c4970b4cacae3c89b483ddad32 [2023-08-27 05:21:44,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 05:21:44,346 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 05:21:44,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 05:21:44,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 05:21:44,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 05:21:44,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a21e51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44, skipping insertion in model container [2023-08-27 05:21:44,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,389 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 05:21:44,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:21:44,621 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 05:21:44,630 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:21:44,631 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:21:44,636 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-27 05:21:44,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:21:44,692 INFO L206 MainTranslator]: Completed translation [2023-08-27 05:21:44,692 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44 WrapperNode [2023-08-27 05:21:44,692 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 05:21:44,693 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 05:21:44,693 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 05:21:44,693 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 05:21:44,698 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,763 INFO L138 Inliner]: procedures = 271, calls = 42, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 284 [2023-08-27 05:21:44,763 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 05:21:44,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 05:21:44,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 05:21:44,764 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 05:21:44,770 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,786 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,793 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,797 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,799 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,800 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 05:21:44,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 05:21:44,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 05:21:44,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 05:21:44,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (1/1) ... [2023-08-27 05:21:44,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:21:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:21:44,842 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) [2023-08-27 05:21:44,848 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 [2023-08-27 05:21:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 05:21:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 05:21:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 05:21:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 05:21:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 05:21:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 05:21:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-27 05:21:44,892 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-27 05:21:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 05:21:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 05:21:44,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 05:21:44,894 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 05:21:45,030 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 05:21:45,031 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 05:21:45,301 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 05:21:45,310 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 05:21:45,310 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-27 05:21:45,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:21:45 BoogieIcfgContainer [2023-08-27 05:21:45,312 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 05:21:45,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 05:21:45,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 05:21:45,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 05:21:45,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:21:44" (1/3) ... [2023-08-27 05:21:45,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbf2950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:21:45, skipping insertion in model container [2023-08-27 05:21:45,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:21:44" (2/3) ... [2023-08-27 05:21:45,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbf2950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:21:45, skipping insertion in model container [2023-08-27 05:21:45,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:21:45" (3/3) ... [2023-08-27 05:21:45,316 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-08-27 05:21:45,329 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 05:21:45,329 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2023-08-27 05:21:45,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 05:21:45,413 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-27 05:21:45,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 305 transitions, 618 flow [2023-08-27 05:21:45,514 INFO L124 PetriNetUnfolderBase]: 78/470 cut-off events. [2023-08-27 05:21:45,514 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 05:21:45,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 470 events. 78/470 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2283 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 259. Up to 8 conditions per place. [2023-08-27 05:21:45,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 305 transitions, 618 flow [2023-08-27 05:21:45,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 294 transitions, 593 flow [2023-08-27 05:21:45,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:21:45,557 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 250 places, 294 transitions, 593 flow [2023-08-27 05:21:45,559 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 250 places, 294 transitions, 593 flow [2023-08-27 05:21:45,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 294 transitions, 593 flow [2023-08-27 05:21:45,621 INFO L124 PetriNetUnfolderBase]: 77/459 cut-off events. [2023-08-27 05:21:45,621 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:21:45,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 459 events. 77/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2188 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 259. Up to 8 conditions per place. [2023-08-27 05:21:45,634 INFO L119 LiptonReduction]: Number of co-enabled transitions 29750 [2023-08-27 05:21:48,606 INFO L134 LiptonReduction]: Checked pairs total: 55345 [2023-08-27 05:21:48,606 INFO L136 LiptonReduction]: Total number of compositions: 273 [2023-08-27 05:21:48,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:21:48,619 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@649393e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:21:48,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:21:48,622 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:21:48,622 INFO L124 PetriNetUnfolderBase]: 14/51 cut-off events. [2023-08-27 05:21:48,622 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:21:48,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:21:48,623 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-27 05:21:48,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:21:48,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:21:48,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1789395022, now seen corresponding path program 1 times [2023-08-27 05:21:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:21:48,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402152089] [2023-08-27 05:21:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:21:48,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:21:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:21:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:21:48,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:21:48,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402152089] [2023-08-27 05:21:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402152089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:21:48,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:21:48,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:21:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123965894] [2023-08-27 05:21:48,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:21:48,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:21:48,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:21:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:21:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:21:48,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 578 [2023-08-27 05:21:48,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 118 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:48,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:21:48,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 578 [2023-08-27 05:21:48,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:21:49,102 INFO L124 PetriNetUnfolderBase]: 1149/2382 cut-off events. [2023-08-27 05:21:49,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:21:49,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4553 conditions, 2382 events. 1149/2382 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16190 event pairs, 990 based on Foata normal form. 304/1874 useless extension candidates. Maximal degree in co-relation 4440. Up to 2164 conditions per place. [2023-08-27 05:21:49,107 INFO L140 encePairwiseOnDemand]: 543/578 looper letters, 31 selfloop transitions, 2 changer transitions 49/87 dead transitions. [2023-08-27 05:21:49,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 87 transitions, 327 flow [2023-08-27 05:21:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 05:21:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 05:21:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 860 transitions. [2023-08-27 05:21:49,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49596309111880044 [2023-08-27 05:21:49,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 860 transitions. [2023-08-27 05:21:49,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 860 transitions. [2023-08-27 05:21:49,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:21:49,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 860 transitions. [2023-08-27 05:21:49,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,138 INFO L175 Difference]: Start difference. First operand has 83 places, 118 transitions, 241 flow. Second operand 3 states and 860 transitions. [2023-08-27 05:21:49,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 87 transitions, 327 flow [2023-08-27 05:21:49,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 327 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 05:21:49,142 INFO L231 Difference]: Finished difference. Result has 86 places, 38 transitions, 91 flow [2023-08-27 05:21:49,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=86, PETRI_TRANSITIONS=38} [2023-08-27 05:21:49,146 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 3 predicate places. [2023-08-27 05:21:49,146 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 38 transitions, 91 flow [2023-08-27 05:21:49,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:21:49,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 05:21:49,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 05:21:49,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:21:49,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:21:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1282996232, now seen corresponding path program 1 times [2023-08-27 05:21:49,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:21:49,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985032411] [2023-08-27 05:21:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:21:49,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:21:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:21:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:21:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:21:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985032411] [2023-08-27 05:21:49,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985032411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:21:49,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575157583] [2023-08-27 05:21:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:21:49,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:21:49,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:21:49,250 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) [2023-08-27 05:21:49,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 05:21:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:21:49,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 05:21:49,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:21:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:21:49,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:21:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:21:49,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575157583] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:21:49,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:21:49,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 05:21:49,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473113179] [2023-08-27 05:21:49,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:21:49,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 05:21:49,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:21:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 05:21:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 05:21:49,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 578 [2023-08-27 05:21:49,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 38 transitions, 91 flow. Second operand has 7 states, 7 states have (on average 252.57142857142858) internal successors, (1768), 7 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:21:49,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 578 [2023-08-27 05:21:49,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:21:49,468 INFO L124 PetriNetUnfolderBase]: 123/289 cut-off events. [2023-08-27 05:21:49,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:21:49,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 289 events. 123/289 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1132 event pairs, 110 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 557. Up to 260 conditions per place. [2023-08-27 05:21:49,469 INFO L140 encePairwiseOnDemand]: 575/578 looper letters, 31 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-08-27 05:21:49,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 175 flow [2023-08-27 05:21:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 05:21:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 05:21:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1545 transitions. [2023-08-27 05:21:49,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455017301038062 [2023-08-27 05:21:49,472 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1545 transitions. [2023-08-27 05:21:49,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1545 transitions. [2023-08-27 05:21:49,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:21:49,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1545 transitions. [2023-08-27 05:21:49,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 257.5) internal successors, (1545), 6 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,482 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,483 INFO L175 Difference]: Start difference. First operand has 86 places, 38 transitions, 91 flow. Second operand 6 states and 1545 transitions. [2023-08-27 05:21:49,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 175 flow [2023-08-27 05:21:49,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 171 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 05:21:49,486 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 123 flow [2023-08-27 05:21:49,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-08-27 05:21:49,487 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -36 predicate places. [2023-08-27 05:21:49,487 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 123 flow [2023-08-27 05:21:49,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 252.57142857142858) internal successors, (1768), 7 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:21:49,488 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-27 05:21:49,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 05:21:49,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:21:49,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:21:49,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:21:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash 771857102, now seen corresponding path program 2 times [2023-08-27 05:21:49,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:21:49,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729267606] [2023-08-27 05:21:49,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:21:49,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:21:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:21:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:21:49,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:21:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729267606] [2023-08-27 05:21:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729267606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:21:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237633995] [2023-08-27 05:21:49,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 05:21:49,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:21:49,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:21:49,767 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) [2023-08-27 05:21:49,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 05:21:49,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 05:21:49,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 05:21:49,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 05:21:49,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:21:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:21:49,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:21:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 05:21:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237633995] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:21:49,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:21:49,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 05:21:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576758021] [2023-08-27 05:21:49,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:21:49,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 05:21:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:21:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 05:21:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 05:21:49,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 578 [2023-08-27 05:21:49,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 123 flow. Second operand has 13 states, 13 states have (on average 252.30769230769232) internal successors, (3280), 13 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:49,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:21:49,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 578 [2023-08-27 05:21:49,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:21:49,989 INFO L124 PetriNetUnfolderBase]: 123/295 cut-off events. [2023-08-27 05:21:49,989 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-27 05:21:49,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 295 events. 123/295 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1137 event pairs, 110 based on Foata normal form. 6/183 useless extension candidates. Maximal degree in co-relation 548. Up to 260 conditions per place. [2023-08-27 05:21:49,990 INFO L140 encePairwiseOnDemand]: 575/578 looper letters, 31 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2023-08-27 05:21:49,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 243 flow [2023-08-27 05:21:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 05:21:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 05:21:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3060 transitions. [2023-08-27 05:21:49,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2023-08-27 05:21:49,995 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3060 transitions. [2023-08-27 05:21:49,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3060 transitions. [2023-08-27 05:21:49,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:21:49,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3060 transitions. [2023-08-27 05:21:50,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:50,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 578.0) internal successors, (7514), 13 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:50,011 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 578.0) internal successors, (7514), 13 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:50,011 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 123 flow. Second operand 12 states and 3060 transitions. [2023-08-27 05:21:50,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 243 flow [2023-08-27 05:21:50,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 229 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 05:21:50,013 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 193 flow [2023-08-27 05:21:50,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=193, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-08-27 05:21:50,015 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -20 predicate places. [2023-08-27 05:21:50,015 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 193 flow [2023-08-27 05:21:50,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 252.30769230769232) internal successors, (3280), 13 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:50,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:21:50,016 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-27 05:21:50,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 05:21:50,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-27 05:21:50,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:21:50,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:21:50,224 INFO L85 PathProgramCache]: Analyzing trace with hash -381572466, now seen corresponding path program 3 times [2023-08-27 05:21:50,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:21:50,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873846630] [2023-08-27 05:21:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:21:50,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:21:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:21:50,261 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:21:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:21:50,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:21:50,296 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:21:50,297 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:21:50,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 05:21:50,298 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-27 05:21:50,299 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:21:50,300 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:21:50,300 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 05:21:50,330 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 05:21:50,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 392 transitions, 802 flow [2023-08-27 05:21:50,392 INFO L124 PetriNetUnfolderBase]: 126/759 cut-off events. [2023-08-27 05:21:50,392 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:21:50,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 759 events. 126/759 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4121 event pairs, 0 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 472. Up to 12 conditions per place. [2023-08-27 05:21:50,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 392 transitions, 802 flow [2023-08-27 05:21:50,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 390 transitions, 798 flow [2023-08-27 05:21:50,404 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:21:50,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 331 places, 390 transitions, 798 flow [2023-08-27 05:21:50,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 331 places, 390 transitions, 798 flow [2023-08-27 05:21:50,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 390 transitions, 798 flow [2023-08-27 05:21:50,456 INFO L124 PetriNetUnfolderBase]: 126/757 cut-off events. [2023-08-27 05:21:50,457 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:21:50,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 757 events. 126/757 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4106 event pairs, 0 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 470. Up to 12 conditions per place. [2023-08-27 05:21:50,484 INFO L119 LiptonReduction]: Number of co-enabled transitions 77180 [2023-08-27 05:21:53,841 INFO L134 LiptonReduction]: Checked pairs total: 148565 [2023-08-27 05:21:53,841 INFO L136 LiptonReduction]: Total number of compositions: 339 [2023-08-27 05:21:53,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:21:53,843 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@649393e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:21:53,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:21:53,850 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:21:53,850 INFO L124 PetriNetUnfolderBase]: 55/186 cut-off events. [2023-08-27 05:21:53,850 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 05:21:53,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:21:53,850 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 05:21:53,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:21:53,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:21:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1566649997, now seen corresponding path program 1 times [2023-08-27 05:21:53,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:21:53,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097685251] [2023-08-27 05:21:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:21:53,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:21:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:21:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:21:53,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:21:53,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097685251] [2023-08-27 05:21:53,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097685251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:21:53,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:21:53,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:21:53,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639839825] [2023-08-27 05:21:53,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:21:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:21:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:21:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:21:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:21:53,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 731 [2023-08-27 05:21:53,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 162 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:53,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:21:53,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 731 [2023-08-27 05:21:53,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:21:58,227 INFO L124 PetriNetUnfolderBase]: 59056/89332 cut-off events. [2023-08-27 05:21:58,227 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2023-08-27 05:21:58,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175119 conditions, 89332 events. 59056/89332 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 3041. Compared 706141 event pairs, 53661 based on Foata normal form. 10154/67009 useless extension candidates. Maximal degree in co-relation 79292. Up to 85641 conditions per place. [2023-08-27 05:21:58,389 INFO L140 encePairwiseOnDemand]: 687/731 looper letters, 58 selfloop transitions, 2 changer transitions 55/122 dead transitions. [2023-08-27 05:21:58,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 122 transitions, 474 flow [2023-08-27 05:21:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 05:21:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 05:21:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1114 transitions. [2023-08-27 05:21:58,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079799361605107 [2023-08-27 05:21:58,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1114 transitions. [2023-08-27 05:21:58,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1114 transitions. [2023-08-27 05:21:58,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:21:58,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1114 transitions. [2023-08-27 05:21:58,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 371.3333333333333) internal successors, (1114), 3 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:58,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:58,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:58,397 INFO L175 Difference]: Start difference. First operand has 116 places, 162 transitions, 342 flow. Second operand 3 states and 1114 transitions. [2023-08-27 05:21:58,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 122 transitions, 474 flow [2023-08-27 05:21:58,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 05:21:58,402 INFO L231 Difference]: Finished difference. Result has 119 places, 67 transitions, 156 flow [2023-08-27 05:21:58,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=119, PETRI_TRANSITIONS=67} [2023-08-27 05:21:58,403 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 3 predicate places. [2023-08-27 05:21:58,403 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 67 transitions, 156 flow [2023-08-27 05:21:58,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:58,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:21:58,404 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 05:21:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 05:21:58,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:21:58,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:21:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash 894406631, now seen corresponding path program 1 times [2023-08-27 05:21:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:21:58,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526962244] [2023-08-27 05:21:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:21:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:21:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:21:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:21:58,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:21:58,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526962244] [2023-08-27 05:21:58,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526962244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:21:58,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971231964] [2023-08-27 05:21:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:21:58,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:21:58,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:21:58,433 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) [2023-08-27 05:21:58,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 05:21:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:21:58,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 05:21:58,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:21:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:21:58,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:21:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:21:58,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971231964] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:21:58,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:21:58,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 05:21:58,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584553521] [2023-08-27 05:21:58,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:21:58,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 05:21:58,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:21:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 05:21:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 05:21:58,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 731 [2023-08-27 05:21:58,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 67 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 323.7142857142857) internal successors, (2266), 7 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:58,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:21:58,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 731 [2023-08-27 05:21:58,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:21:58,997 INFO L124 PetriNetUnfolderBase]: 7016/10963 cut-off events. [2023-08-27 05:21:58,997 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-27 05:21:59,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21578 conditions, 10963 events. 7016/10963 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 71913 event pairs, 6451 based on Foata normal form. 0/6360 useless extension candidates. Maximal degree in co-relation 21565. Up to 10507 conditions per place. [2023-08-27 05:21:59,036 INFO L140 encePairwiseOnDemand]: 728/731 looper letters, 58 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-08-27 05:21:59,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 70 transitions, 294 flow [2023-08-27 05:21:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 05:21:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 05:21:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1998 transitions. [2023-08-27 05:21:59,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45554035567715456 [2023-08-27 05:21:59,040 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1998 transitions. [2023-08-27 05:21:59,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1998 transitions. [2023-08-27 05:21:59,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:21:59,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1998 transitions. [2023-08-27 05:21:59,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 333.0) internal successors, (1998), 6 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:59,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 731.0) internal successors, (5117), 7 states have internal predecessors, (5117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:59,048 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 731.0) internal successors, (5117), 7 states have internal predecessors, (5117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:59,048 INFO L175 Difference]: Start difference. First operand has 119 places, 67 transitions, 156 flow. Second operand 6 states and 1998 transitions. [2023-08-27 05:21:59,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 70 transitions, 294 flow [2023-08-27 05:21:59,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 288 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 05:21:59,050 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 186 flow [2023-08-27 05:21:59,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2023-08-27 05:21:59,051 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -40 predicate places. [2023-08-27 05:21:59,051 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 186 flow [2023-08-27 05:21:59,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 323.7142857142857) internal successors, (2266), 7 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:59,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:21:59,052 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 05:21:59,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-27 05:21:59,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:21:59,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:21:59,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:21:59,257 INFO L85 PathProgramCache]: Analyzing trace with hash 379303181, now seen corresponding path program 2 times [2023-08-27 05:21:59,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:21:59,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978256816] [2023-08-27 05:21:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:21:59,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:21:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:21:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:21:59,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:21:59,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978256816] [2023-08-27 05:21:59,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978256816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 05:21:59,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84507613] [2023-08-27 05:21:59,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 05:21:59,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:21:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:21:59,330 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) [2023-08-27 05:21:59,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 05:21:59,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 05:21:59,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 05:21:59,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 05:21:59,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 05:21:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:21:59,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 05:21:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 05:21:59,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84507613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 05:21:59,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 05:21:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 05:21:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051352282] [2023-08-27 05:21:59,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 05:21:59,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 05:21:59,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:21:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 05:21:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 05:21:59,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 731 [2023-08-27 05:21:59,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 186 flow. Second operand has 13 states, 13 states have (on average 323.38461538461536) internal successors, (4204), 13 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:21:59,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:21:59,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 731 [2023-08-27 05:21:59,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 05:22:00,016 INFO L124 PetriNetUnfolderBase]: 7016/10969 cut-off events. [2023-08-27 05:22:00,016 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-27 05:22:00,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21608 conditions, 10969 events. 7016/10969 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 71912 event pairs, 6451 based on Foata normal form. 6/6373 useless extension candidates. Maximal degree in co-relation 21549. Up to 10507 conditions per place. [2023-08-27 05:22:00,047 INFO L140 encePairwiseOnDemand]: 728/731 looper letters, 58 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2023-08-27 05:22:00,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 360 flow [2023-08-27 05:22:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 05:22:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 05:22:00,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3939 transitions. [2023-08-27 05:22:00,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490424076607387 [2023-08-27 05:22:00,053 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3939 transitions. [2023-08-27 05:22:00,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3939 transitions. [2023-08-27 05:22:00,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 05:22:00,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3939 transitions. [2023-08-27 05:22:00,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 328.25) internal successors, (3939), 12 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:22:00,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 731.0) internal successors, (9503), 13 states have internal predecessors, (9503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:22:00,067 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 731.0) internal successors, (9503), 13 states have internal predecessors, (9503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:22:00,068 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 186 flow. Second operand 12 states and 3939 transitions. [2023-08-27 05:22:00,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 360 flow [2023-08-27 05:22:00,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 76 transitions, 346 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 05:22:00,069 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 256 flow [2023-08-27 05:22:00,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=256, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2023-08-27 05:22:00,070 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -24 predicate places. [2023-08-27 05:22:00,070 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 256 flow [2023-08-27 05:22:00,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 323.38461538461536) internal successors, (4204), 13 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:22:00,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:22:00,071 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 05:22:00,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 05:22:00,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 05:22:00,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:22:00,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:22:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash 196863693, now seen corresponding path program 3 times [2023-08-27 05:22:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:22:00,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358841717] [2023-08-27 05:22:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:22:00,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:22:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:22:00,294 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:22:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:22:00,314 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:22:00,314 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:22:00,315 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:22:00,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 05:22:00,315 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-27 05:22:00,315 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:22:00,315 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:22:00,315 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-27 05:22:00,343 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 05:22:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 406 places, 479 transitions, 988 flow [2023-08-27 05:22:00,434 INFO L124 PetriNetUnfolderBase]: 179/1089 cut-off events. [2023-08-27 05:22:00,435 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:22:00,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 1089 events. 179/1089 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 6265 event pairs, 1 based on Foata normal form. 0/815 useless extension candidates. Maximal degree in co-relation 767. Up to 16 conditions per place. [2023-08-27 05:22:00,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 406 places, 479 transitions, 988 flow [2023-08-27 05:22:00,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 477 transitions, 984 flow [2023-08-27 05:22:00,457 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:22:00,457 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 404 places, 477 transitions, 984 flow [2023-08-27 05:22:00,457 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 404 places, 477 transitions, 984 flow [2023-08-27 05:22:00,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 404 places, 477 transitions, 984 flow [2023-08-27 05:22:00,557 INFO L124 PetriNetUnfolderBase]: 179/1087 cut-off events. [2023-08-27 05:22:00,557 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:22:00,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 1087 events. 179/1087 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 6236 event pairs, 1 based on Foata normal form. 0/815 useless extension candidates. Maximal degree in co-relation 765. Up to 16 conditions per place. [2023-08-27 05:22:00,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 138210 [2023-08-27 05:22:04,472 INFO L134 LiptonReduction]: Checked pairs total: 271985 [2023-08-27 05:22:04,472 INFO L136 LiptonReduction]: Total number of compositions: 423 [2023-08-27 05:22:04,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:22:04,474 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@649393e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:22:04,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:22:04,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:22:04,485 INFO L124 PetriNetUnfolderBase]: 91/295 cut-off events. [2023-08-27 05:22:04,485 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 05:22:04,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:22:04,485 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-27 05:22:04,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:22:04,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:22:04,486 INFO L85 PathProgramCache]: Analyzing trace with hash 194680842, now seen corresponding path program 1 times [2023-08-27 05:22:04,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:22:04,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895558149] [2023-08-27 05:22:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:22:04,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:22:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 05:22:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 05:22:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 05:22:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895558149] [2023-08-27 05:22:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895558149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 05:22:04,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 05:22:04,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 05:22:04,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001962381] [2023-08-27 05:22:04,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 05:22:04,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 05:22:04,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 05:22:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 05:22:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 05:22:04,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 393 out of 902 [2023-08-27 05:22:04,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 203 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 395.3333333333333) internal successors, (1186), 3 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 05:22:04,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 05:22:04,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 393 of 902 [2023-08-27 05:22:04,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand