/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.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:22:55,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:22:55,819 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 [2023-08-25 18:22:55,823 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:22:55,824 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:22:55,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:22:55,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:22:55,856 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:22:55,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:22:55,857 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:22:55,858 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:22:55,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:22:55,858 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:22:55,859 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:22:55,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:22:55,859 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:22:55,859 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:22:55,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:22:55,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:22:55,860 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:22:55,861 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:22:55,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:22:55,870 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:22:55,870 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:22:55,871 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:22:55,871 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:22:55,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:22:55,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:22:55,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:22:55,872 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:22:55,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:22:55,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:22:55,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:22:55,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:22:55,874 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:22:55,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:22:56,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:22:56,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:22:56,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:22:56,219 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:22:56,219 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:22:56,220 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-25 18:22:57,416 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:22:57,702 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:22:57,702 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-25 18:22:57,730 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/582c015b6/a9f542b0d3dc425280e0824d9020e69d/FLAG7c245357a [2023-08-25 18:22:57,744 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/582c015b6/a9f542b0d3dc425280e0824d9020e69d [2023-08-25 18:22:57,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:22:57,751 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:22:57,754 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:22:57,754 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:22:57,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:22:57,757 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:22:57" (1/1) ... [2023-08-25 18:22:57,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@401fd313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:57, skipping insertion in model container [2023-08-25 18:22:57,758 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:22:57" (1/1) ... [2023-08-25 18:22:57,808 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:22:58,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:22:58,128 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:22:58,141 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:22:58,143 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:22:58,151 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-25 18:22:58,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:22:58,225 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:22:58,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58 WrapperNode [2023-08-25 18:22:58,227 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:22:58,229 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:22:58,229 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:22:58,229 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:22:58,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,313 INFO L138 Inliner]: procedures = 270, calls = 42, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 265 [2023-08-25 18:22:58,313 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:22:58,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:22:58,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:22:58,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:22:58,321 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,336 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,337 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,362 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,368 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,373 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,376 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:22:58,377 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:22:58,378 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:22:58,378 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:22:58,378 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (1/1) ... [2023-08-25 18:22:58,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:22:58,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:22:58,409 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) [2023-08-25 18:22:58,428 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 [2023-08-25 18:22:58,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:22:58,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:22:58,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:22:58,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:22:58,447 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:22:58,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:22:58,447 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:22:58,447 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:22:58,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:22:58,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:22:58,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:22:58,450 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-25 18:22:58,572 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:22:58,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:22:58,916 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:22:58,924 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:22:58,924 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-25 18:22:58,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:22:58 BoogieIcfgContainer [2023-08-25 18:22:58,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:22:58,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:22:58,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:22:58,931 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:22:58,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:22:57" (1/3) ... [2023-08-25 18:22:58,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18934846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:22:58, skipping insertion in model container [2023-08-25 18:22:58,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:22:58" (2/3) ... [2023-08-25 18:22:58,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18934846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:22:58, skipping insertion in model container [2023-08-25 18:22:58,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:22:58" (3/3) ... [2023-08-25 18:22:58,933 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-08-25 18:22:58,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:22:58,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-25 18:22:58,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:22:59,049 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 18:22:59,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 278 transitions, 564 flow [2023-08-25 18:22:59,245 INFO L124 PetriNetUnfolderBase]: 48/394 cut-off events. [2023-08-25 18:22:59,246 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 18:22:59,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 394 events. 48/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1614 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 230. Up to 8 conditions per place. [2023-08-25 18:22:59,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 278 transitions, 564 flow [2023-08-25 18:22:59,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 273 transitions, 551 flow [2023-08-25 18:22:59,270 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:22:59,284 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 273 transitions, 551 flow [2023-08-25 18:22:59,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 273 transitions, 551 flow [2023-08-25 18:22:59,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 273 transitions, 551 flow [2023-08-25 18:22:59,357 INFO L124 PetriNetUnfolderBase]: 47/389 cut-off events. [2023-08-25 18:22:59,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:22:59,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 389 events. 47/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1553 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 230. Up to 8 conditions per place. [2023-08-25 18:22:59,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 26596 [2023-08-25 18:23:02,438 INFO L134 LiptonReduction]: Checked pairs total: 89366 [2023-08-25 18:23:02,439 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-08-25 18:23:02,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:23:02,455 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;@19633b89, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:23:02,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:23:02,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:23:02,460 INFO L124 PetriNetUnfolderBase]: 9/40 cut-off events. [2023-08-25 18:23:02,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:23:02,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:02,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-25 18:23:02,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:02,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:02,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1659826767, now seen corresponding path program 1 times [2023-08-25 18:23:02,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:02,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388963618] [2023-08-25 18:23:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:02,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:23:02,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:23:02,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388963618] [2023-08-25 18:23:02,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388963618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 18:23:02,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 18:23:02,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 18:23:02,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152260525] [2023-08-25 18:23:02,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 18:23:02,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 18:23:02,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:23:02,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 18:23:02,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 18:23:02,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 460 [2023-08-25 18:23:02,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:02,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:23:02,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 460 [2023-08-25 18:23:02,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:23:02,961 INFO L124 PetriNetUnfolderBase]: 420/1591 cut-off events. [2023-08-25 18:23:02,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:23:02,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2417 conditions, 1591 events. 420/1591 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 11521 event pairs, 378 based on Foata normal form. 163/1565 useless extension candidates. Maximal degree in co-relation 2324. Up to 820 conditions per place. [2023-08-25 18:23:02,967 INFO L140 encePairwiseOnDemand]: 435/460 looper letters, 24 selfloop transitions, 2 changer transitions 54/111 dead transitions. [2023-08-25 18:23:02,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 315 flow [2023-08-25 18:23:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 18:23:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 18:23:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 778 transitions. [2023-08-25 18:23:02,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563768115942029 [2023-08-25 18:23:02,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 778 transitions. [2023-08-25 18:23:02,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 778 transitions. [2023-08-25 18:23:02,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:23:02,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 778 transitions. [2023-08-25 18:23:02,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:02,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:02,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:02,998 INFO L175 Difference]: Start difference. First operand has 111 places, 132 transitions, 269 flow. Second operand 3 states and 778 transitions. [2023-08-25 18:23:02,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 315 flow [2023-08-25 18:23:03,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 111 transitions, 315 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 18:23:03,004 INFO L231 Difference]: Finished difference. Result has 113 places, 57 transitions, 129 flow [2023-08-25 18:23:03,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=113, PETRI_TRANSITIONS=57} [2023-08-25 18:23:03,008 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, 2 predicate places. [2023-08-25 18:23:03,008 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 57 transitions, 129 flow [2023-08-25 18:23:03,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:03,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:03,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-25 18:23:03,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:23:03,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:03,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2056122601, now seen corresponding path program 1 times [2023-08-25 18:23:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:03,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924575370] [2023-08-25 18:23:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:23:03,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:23:03,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924575370] [2023-08-25 18:23:03,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924575370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:23:03,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680125470] [2023-08-25 18:23:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:03,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:23:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:23:03,101 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) [2023-08-25 18:23:03,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-25 18:23:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:03,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-25 18:23:03,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:23:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:23:03,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:23:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:23:03,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680125470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:23:03,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:23:03,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-25 18:23:03,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242494308] [2023-08-25 18:23:03,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:23:03,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-25 18:23:03,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:23:03,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-25 18:23:03,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-25 18:23:03,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 460 [2023-08-25 18:23:03,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 57 transitions, 129 flow. Second operand has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:03,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:23:03,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 460 [2023-08-25 18:23:03,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:23:03,356 INFO L124 PetriNetUnfolderBase]: 59/260 cut-off events. [2023-08-25 18:23:03,356 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:23:03,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 260 events. 59/260 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 895 event pairs, 54 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 403. Up to 136 conditions per place. [2023-08-25 18:23:03,357 INFO L140 encePairwiseOnDemand]: 457/460 looper letters, 24 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-25 18:23:03,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 199 flow [2023-08-25 18:23:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-25 18:23:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-25 18:23:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1454 transitions. [2023-08-25 18:23:03,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268115942028986 [2023-08-25 18:23:03,362 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1454 transitions. [2023-08-25 18:23:03,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1454 transitions. [2023-08-25 18:23:03,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:23:03,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1454 transitions. [2023-08-25 18:23:03,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 242.33333333333334) internal successors, (1454), 6 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:03,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:03,372 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:03,372 INFO L175 Difference]: Start difference. First operand has 113 places, 57 transitions, 129 flow. Second operand 6 states and 1454 transitions. [2023-08-25 18:23:03,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 199 flow [2023-08-25 18:23:03,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 195 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-25 18:23:03,375 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 161 flow [2023-08-25 18:23:03,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-25 18:23:03,376 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -44 predicate places. [2023-08-25 18:23:03,376 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 161 flow [2023-08-25 18:23:03,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:03,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:03,377 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-25 18:23:03,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-25 18:23:03,583 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 [2023-08-25 18:23:03,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:03,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:03,584 INFO L85 PathProgramCache]: Analyzing trace with hash -771307313, now seen corresponding path program 2 times [2023-08-25 18:23:03,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:03,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231719705] [2023-08-25 18:23:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:03,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:23:03,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:23:03,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231719705] [2023-08-25 18:23:03,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231719705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:23:03,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327033221] [2023-08-25 18:23:03,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-25 18:23:03,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:23:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:23:03,774 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) [2023-08-25 18:23:03,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-25 18:23:03,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-25 18:23:03,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-25 18:23:03,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-25 18:23:03,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:23:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:23:03,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:23:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-25 18:23:03,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327033221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:23:03,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:23:03,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-25 18:23:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74895953] [2023-08-25 18:23:03,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:23:03,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-25 18:23:03,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:23:03,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-25 18:23:03,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-25 18:23:03,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 460 [2023-08-25 18:23:03,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 161 flow. Second operand has 13 states, 13 states have (on average 238.30769230769232) internal successors, (3098), 13 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:03,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:23:03,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 460 [2023-08-25 18:23:03,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:23:04,046 INFO L124 PetriNetUnfolderBase]: 59/266 cut-off events. [2023-08-25 18:23:04,047 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-25 18:23:04,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 266 events. 59/266 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 895 event pairs, 54 based on Foata normal form. 6/236 useless extension candidates. Maximal degree in co-relation 394. Up to 136 conditions per place. [2023-08-25 18:23:04,048 INFO L140 encePairwiseOnDemand]: 457/460 looper letters, 24 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-08-25 18:23:04,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 66 transitions, 267 flow [2023-08-25 18:23:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-25 18:23:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-25 18:23:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2885 transitions. [2023-08-25 18:23:04,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226449275362319 [2023-08-25 18:23:04,056 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2885 transitions. [2023-08-25 18:23:04,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2885 transitions. [2023-08-25 18:23:04,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:23:04,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2885 transitions. [2023-08-25 18:23:04,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 240.41666666666666) internal successors, (2885), 12 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:04,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 460.0) internal successors, (5980), 13 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:04,075 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 460.0) internal successors, (5980), 13 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:04,076 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 161 flow. Second operand 12 states and 2885 transitions. [2023-08-25 18:23:04,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 66 transitions, 267 flow [2023-08-25 18:23:04,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 66 transitions, 253 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-25 18:23:04,081 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 231 flow [2023-08-25 18:23:04,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=231, PETRI_PLACES=83, PETRI_TRANSITIONS=66} [2023-08-25 18:23:04,082 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -28 predicate places. [2023-08-25 18:23:04,082 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 231 flow [2023-08-25 18:23:04,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 238.30769230769232) internal successors, (3098), 13 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:04,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:04,084 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-25 18:23:04,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-25 18:23:04,293 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 [2023-08-25 18:23:04,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:04,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash -909643121, now seen corresponding path program 3 times [2023-08-25 18:23:04,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:04,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994886408] [2023-08-25 18:23:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:04,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:04,333 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:23:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:04,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:23:04,385 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:23:04,386 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:23:04,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:23:04,388 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-25 18:23:04,389 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:23:04,390 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:23:04,390 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:23:04,467 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 18:23:04,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 389 transitions, 796 flow [2023-08-25 18:23:04,579 INFO L124 PetriNetUnfolderBase]: 80/652 cut-off events. [2023-08-25 18:23:04,579 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-08-25 18:23:04,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 652 events. 80/652 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3285 event pairs, 0 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2023-08-25 18:23:04,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 389 transitions, 796 flow [2023-08-25 18:23:04,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 389 transitions, 796 flow [2023-08-25 18:23:04,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:23:04,595 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 346 places, 389 transitions, 796 flow [2023-08-25 18:23:04,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 346 places, 389 transitions, 796 flow [2023-08-25 18:23:04,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 389 transitions, 796 flow [2023-08-25 18:23:04,725 INFO L124 PetriNetUnfolderBase]: 80/652 cut-off events. [2023-08-25 18:23:04,726 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-08-25 18:23:04,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 652 events. 80/652 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3285 event pairs, 0 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2023-08-25 18:23:04,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 79352 [2023-08-25 18:23:08,499 INFO L134 LiptonReduction]: Checked pairs total: 306727 [2023-08-25 18:23:08,499 INFO L136 LiptonReduction]: Total number of compositions: 261 [2023-08-25 18:23:08,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:23:08,502 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;@19633b89, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:23:08,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:23:08,511 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:23:08,511 INFO L124 PetriNetUnfolderBase]: 21/124 cut-off events. [2023-08-25 18:23:08,511 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 18:23:08,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:08,511 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 18:23:08,511 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:08,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:08,512 INFO L85 PathProgramCache]: Analyzing trace with hash -343846265, now seen corresponding path program 1 times [2023-08-25 18:23:08,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:08,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267014565] [2023-08-25 18:23:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:08,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:23:08,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:23:08,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267014565] [2023-08-25 18:23:08,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267014565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 18:23:08,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 18:23:08,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 18:23:08,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080615046] [2023-08-25 18:23:08,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 18:23:08,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 18:23:08,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:23:08,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 18:23:08,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 18:23:08,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 650 [2023-08-25 18:23:08,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 196 transitions, 410 flow. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:08,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:23:08,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 650 [2023-08-25 18:23:08,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:23:12,349 INFO L124 PetriNetUnfolderBase]: 17084/40028 cut-off events. [2023-08-25 18:23:12,349 INFO L125 PetriNetUnfolderBase]: For 244/320 co-relation queries the response was YES. [2023-08-25 18:23:12,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64911 conditions, 40028 events. 17084/40028 cut-off events. For 244/320 co-relation queries the response was YES. Maximal size of possible extension queue 1145. Compared 444395 event pairs, 15876 based on Foata normal form. 4636/39816 useless extension candidates. Maximal degree in co-relation 22729. Up to 24758 conditions per place. [2023-08-25 18:23:12,467 INFO L140 encePairwiseOnDemand]: 616/650 looper letters, 43 selfloop transitions, 2 changer transitions 59/166 dead transitions. [2023-08-25 18:23:12,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 166 transitions, 484 flow [2023-08-25 18:23:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 18:23:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 18:23:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1095 transitions. [2023-08-25 18:23:12,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2023-08-25 18:23:12,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1095 transitions. [2023-08-25 18:23:12,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1095 transitions. [2023-08-25 18:23:12,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:23:12,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1095 transitions. [2023-08-25 18:23:12,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:12,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:12,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 650.0) internal successors, (2600), 4 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:12,477 INFO L175 Difference]: Start difference. First operand has 164 places, 196 transitions, 410 flow. Second operand 3 states and 1095 transitions. [2023-08-25 18:23:12,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 166 transitions, 484 flow [2023-08-25 18:23:12,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 166 transitions, 484 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 18:23:12,482 INFO L231 Difference]: Finished difference. Result has 167 places, 107 transitions, 236 flow [2023-08-25 18:23:12,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=167, PETRI_TRANSITIONS=107} [2023-08-25 18:23:12,483 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 3 predicate places. [2023-08-25 18:23:12,483 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 107 transitions, 236 flow [2023-08-25 18:23:12,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:12,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:12,483 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-25 18:23:12,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:23:12,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:12,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1772424646, now seen corresponding path program 1 times [2023-08-25 18:23:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:12,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521012700] [2023-08-25 18:23:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:23:12,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:23:12,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521012700] [2023-08-25 18:23:12,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521012700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:23:12,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469582522] [2023-08-25 18:23:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:12,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:23:12,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:23:12,519 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) [2023-08-25 18:23:12,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-25 18:23:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:12,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-25 18:23:12,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:23:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:23:12,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:23:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:23:12,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469582522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:23:12,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:23:12,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-25 18:23:12,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101096200] [2023-08-25 18:23:12,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:23:12,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-25 18:23:12,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:23:12,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-25 18:23:12,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-25 18:23:12,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 650 [2023-08-25 18:23:12,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 107 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 333.7142857142857) internal successors, (2336), 7 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:12,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:23:12,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 650 [2023-08-25 18:23:12,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:23:13,208 INFO L124 PetriNetUnfolderBase]: 2601/6468 cut-off events. [2023-08-25 18:23:13,208 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-08-25 18:23:13,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10540 conditions, 6468 events. 2601/6468 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 54725 event pairs, 2448 based on Foata normal form. 0/5616 useless extension candidates. Maximal degree in co-relation 10527. Up to 3974 conditions per place. [2023-08-25 18:23:13,238 INFO L140 encePairwiseOnDemand]: 647/650 looper letters, 43 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2023-08-25 18:23:13,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 110 transitions, 344 flow [2023-08-25 18:23:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-25 18:23:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-25 18:23:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2043 transitions. [2023-08-25 18:23:13,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238461538461539 [2023-08-25 18:23:13,244 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2043 transitions. [2023-08-25 18:23:13,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2043 transitions. [2023-08-25 18:23:13,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:23:13,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2043 transitions. [2023-08-25 18:23:13,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 340.5) internal successors, (2043), 6 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:13,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 650.0) internal successors, (4550), 7 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:13,254 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 650.0) internal successors, (4550), 7 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:13,254 INFO L175 Difference]: Start difference. First operand has 167 places, 107 transitions, 236 flow. Second operand 6 states and 2043 transitions. [2023-08-25 18:23:13,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 110 transitions, 344 flow [2023-08-25 18:23:13,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 110 transitions, 338 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-25 18:23:13,257 INFO L231 Difference]: Finished difference. Result has 118 places, 110 transitions, 266 flow [2023-08-25 18:23:13,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=118, PETRI_TRANSITIONS=110} [2023-08-25 18:23:13,258 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, -46 predicate places. [2023-08-25 18:23:13,258 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 110 transitions, 266 flow [2023-08-25 18:23:13,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 333.7142857142857) internal successors, (2336), 7 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:13,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:13,259 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 18:23:13,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-25 18:23:13,464 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 [2023-08-25 18:23:13,464 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:13,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:13,465 INFO L85 PathProgramCache]: Analyzing trace with hash 875932231, now seen corresponding path program 2 times [2023-08-25 18:23:13,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:13,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727780065] [2023-08-25 18:23:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:13,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:23:13,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:23:13,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727780065] [2023-08-25 18:23:13,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727780065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:23:13,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826855248] [2023-08-25 18:23:13,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-25 18:23:13,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:23:13,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:23:13,538 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) [2023-08-25 18:23:13,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-25 18:23:13,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-25 18:23:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-25 18:23:13,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-25 18:23:13,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:23:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:23:13,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:23:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-25 18:23:13,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826855248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:23:13,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:23:13,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-25 18:23:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497135555] [2023-08-25 18:23:13,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:23:13,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-25 18:23:13,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:23:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-25 18:23:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-25 18:23:13,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 650 [2023-08-25 18:23:13,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 110 transitions, 266 flow. Second operand has 13 states, 13 states have (on average 333.38461538461536) internal successors, (4334), 13 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:13,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:23:13,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 650 [2023-08-25 18:23:13,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:23:14,171 INFO L124 PetriNetUnfolderBase]: 2601/6474 cut-off events. [2023-08-25 18:23:14,171 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-08-25 18:23:14,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10566 conditions, 6474 events. 2601/6474 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 54728 event pairs, 2448 based on Foata normal form. 6/5629 useless extension candidates. Maximal degree in co-relation 10507. Up to 3974 conditions per place. [2023-08-25 18:23:14,195 INFO L140 encePairwiseOnDemand]: 647/650 looper letters, 43 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-08-25 18:23:14,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 116 transitions, 410 flow [2023-08-25 18:23:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-25 18:23:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-25 18:23:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4044 transitions. [2023-08-25 18:23:14,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5184615384615384 [2023-08-25 18:23:14,205 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4044 transitions. [2023-08-25 18:23:14,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4044 transitions. [2023-08-25 18:23:14,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:23:14,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4044 transitions. [2023-08-25 18:23:14,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 337.0) internal successors, (4044), 12 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:14,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 650.0) internal successors, (8450), 13 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:14,226 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 650.0) internal successors, (8450), 13 states have internal predecessors, (8450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:14,226 INFO L175 Difference]: Start difference. First operand has 118 places, 110 transitions, 266 flow. Second operand 12 states and 4044 transitions. [2023-08-25 18:23:14,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 116 transitions, 410 flow [2023-08-25 18:23:14,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 396 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-25 18:23:14,229 INFO L231 Difference]: Finished difference. Result has 134 places, 116 transitions, 336 flow [2023-08-25 18:23:14,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=650, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=336, PETRI_PLACES=134, PETRI_TRANSITIONS=116} [2023-08-25 18:23:14,229 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, -30 predicate places. [2023-08-25 18:23:14,230 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 116 transitions, 336 flow [2023-08-25 18:23:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 333.38461538461536) internal successors, (4334), 13 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:14,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:14,231 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 18:23:14,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-25 18:23:14,436 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 [2023-08-25 18:23:14,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:14,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2038016487, now seen corresponding path program 3 times [2023-08-25 18:23:14,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:14,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511401869] [2023-08-25 18:23:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:14,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:14,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:23:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:14,488 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:23:14,488 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:23:14,488 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:23:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:23:14,489 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-25 18:23:14,489 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:23:14,489 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:23:14,489 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:23:14,543 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 18:23:14,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 444 places, 500 transitions, 1030 flow [2023-08-25 18:23:14,713 INFO L124 PetriNetUnfolderBase]: 117/955 cut-off events. [2023-08-25 18:23:14,713 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-25 18:23:14,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 955 events. 117/955 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5414 event pairs, 1 based on Foata normal form. 0/784 useless extension candidates. Maximal degree in co-relation 660. Up to 16 conditions per place. [2023-08-25 18:23:14,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 444 places, 500 transitions, 1030 flow [2023-08-25 18:23:14,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 500 transitions, 1030 flow [2023-08-25 18:23:14,745 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:23:14,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 444 places, 500 transitions, 1030 flow [2023-08-25 18:23:14,745 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 444 places, 500 transitions, 1030 flow [2023-08-25 18:23:14,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 444 places, 500 transitions, 1030 flow [2023-08-25 18:23:14,936 INFO L124 PetriNetUnfolderBase]: 117/955 cut-off events. [2023-08-25 18:23:14,937 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-25 18:23:14,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 955 events. 117/955 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5414 event pairs, 1 based on Foata normal form. 0/784 useless extension candidates. Maximal degree in co-relation 660. Up to 16 conditions per place. [2023-08-25 18:23:15,006 INFO L119 LiptonReduction]: Number of co-enabled transitions 155652 [2023-08-25 18:23:19,773 INFO L134 LiptonReduction]: Checked pairs total: 609574 [2023-08-25 18:23:19,773 INFO L136 LiptonReduction]: Total number of compositions: 340 [2023-08-25 18:23:19,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:23:19,776 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;@19633b89, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:23:19,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:23:19,794 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:23:19,795 INFO L124 PetriNetUnfolderBase]: 36/228 cut-off events. [2023-08-25 18:23:19,795 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-25 18:23:19,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:19,795 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-25 18:23:19,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:19,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash -361938873, now seen corresponding path program 1 times [2023-08-25 18:23:19,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:19,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523358912] [2023-08-25 18:23:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:19,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:23:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:23:19,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:23:19,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523358912] [2023-08-25 18:23:19,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523358912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 18:23:19,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 18:23:19,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 18:23:19,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856180501] [2023-08-25 18:23:19,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 18:23:19,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 18:23:19,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:23:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 18:23:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 18:23:19,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 427 out of 840 [2023-08-25 18:23:19,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 256 transitions, 542 flow. Second operand has 3 states, 3 states have (on average 429.3333333333333) internal successors, (1288), 3 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:23:19,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:23:19,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 427 of 840 [2023-08-25 18:23:19,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:24:41,052 INFO L124 PetriNetUnfolderBase]: 494639/926538 cut-off events. [2023-08-25 18:24:41,052 INFO L125 PetriNetUnfolderBase]: For 6499/8067 co-relation queries the response was YES. [2023-08-25 18:24:43,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1563894 conditions, 926538 events. 494639/926538 cut-off events. For 6499/8067 co-relation queries the response was YES. Maximal size of possible extension queue 20522. Compared 12401658 event pairs, 463987 based on Foata normal form. 125597/937897 useless extension candidates. Maximal degree in co-relation 250598. Up to 634351 conditions per place. [2023-08-25 18:24:45,173 INFO L140 encePairwiseOnDemand]: 796/840 looper letters, 62 selfloop transitions, 2 changer transitions 60/216 dead transitions. [2023-08-25 18:24:45,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 216 transitions, 636 flow [2023-08-25 18:24:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 18:24:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 18:24:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1410 transitions. [2023-08-25 18:24:45,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2023-08-25 18:24:45,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1410 transitions. [2023-08-25 18:24:45,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1410 transitions. [2023-08-25 18:24:45,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:24:45,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1410 transitions. [2023-08-25 18:24:45,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 470.0) internal successors, (1410), 3 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:24:45,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 840.0) internal successors, (3360), 4 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:24:45,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 840.0) internal successors, (3360), 4 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:24:45,199 INFO L175 Difference]: Start difference. First operand has 214 places, 256 transitions, 542 flow. Second operand 3 states and 1410 transitions. [2023-08-25 18:24:45,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 216 transitions, 636 flow [2023-08-25 18:24:45,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 216 transitions, 636 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 18:24:45,208 INFO L231 Difference]: Finished difference. Result has 217 places, 156 transitions, 343 flow [2023-08-25 18:24:45,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=217, PETRI_TRANSITIONS=156} [2023-08-25 18:24:45,209 INFO L281 CegarLoopForPetriNet]: 214 programPoint places, 3 predicate places. [2023-08-25 18:24:45,209 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 156 transitions, 343 flow [2023-08-25 18:24:45,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 429.3333333333333) internal successors, (1288), 3 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:24:45,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:24:45,210 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:24:45,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 18:24:45,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:24:45,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:24:45,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1830798911, now seen corresponding path program 1 times [2023-08-25 18:24:45,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:24:45,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493067668] [2023-08-25 18:24:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:24:45,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:24:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:24:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:24:45,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:24:45,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493067668] [2023-08-25 18:24:45,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493067668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:24:45,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396630202] [2023-08-25 18:24:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:24:45,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:24:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:24:45,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-25 18:24:45,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-25 18:24:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:24:45,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-25 18:24:45,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:24:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:24:45,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:24:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:24:45,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396630202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:24:45,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:24:45,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-25 18:24:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318797105] [2023-08-25 18:24:45,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:24:45,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-25 18:24:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:24:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-25 18:24:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-25 18:24:45,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 427 out of 840 [2023-08-25 18:24:45,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 156 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 428.85714285714283) internal successors, (3002), 7 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:24:45,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:24:45,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 427 of 840 [2023-08-25 18:24:45,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:25:01,715 INFO L124 PetriNetUnfolderBase]: 78187/151067 cut-off events. [2023-08-25 18:25:01,715 INFO L125 PetriNetUnfolderBase]: For 2491/2491 co-relation queries the response was YES. [2023-08-25 18:25:02,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255773 conditions, 151067 events. 78187/151067 cut-off events. For 2491/2491 co-relation queries the response was YES. Maximal size of possible extension queue 3661. Compared 1714595 event pairs, 73926 based on Foata normal form. 0/130424 useless extension candidates. Maximal degree in co-relation 255759. Up to 102888 conditions per place. [2023-08-25 18:25:02,556 INFO L140 encePairwiseOnDemand]: 837/840 looper letters, 62 selfloop transitions, 5 changer transitions 0/159 dead transitions. [2023-08-25 18:25:02,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 159 transitions, 489 flow [2023-08-25 18:25:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-25 18:25:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-25 18:25:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2632 transitions. [2023-08-25 18:25:02,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2023-08-25 18:25:02,580 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2632 transitions. [2023-08-25 18:25:02,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2632 transitions. [2023-08-25 18:25:02,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:25:02,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2632 transitions. [2023-08-25 18:25:02,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 438.6666666666667) internal successors, (2632), 6 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:25:02,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 840.0) internal successors, (5880), 7 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:25:02,612 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 840.0) internal successors, (5880), 7 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:25:02,613 INFO L175 Difference]: Start difference. First operand has 217 places, 156 transitions, 343 flow. Second operand 6 states and 2632 transitions. [2023-08-25 18:25:02,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 159 transitions, 489 flow [2023-08-25 18:25:02,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 159 transitions, 479 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-25 18:25:02,617 INFO L231 Difference]: Finished difference. Result has 168 places, 159 transitions, 369 flow [2023-08-25 18:25:02,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=369, PETRI_PLACES=168, PETRI_TRANSITIONS=159} [2023-08-25 18:25:02,626 INFO L281 CegarLoopForPetriNet]: 214 programPoint places, -46 predicate places. [2023-08-25 18:25:02,626 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 159 transitions, 369 flow [2023-08-25 18:25:02,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 428.85714285714283) internal successors, (3002), 7 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:25:02,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:25:02,627 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-25 18:25:02,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-25 18:25:02,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-25 18:25:02,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:25:02,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:25:02,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1171979847, now seen corresponding path program 2 times [2023-08-25 18:25:02,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:25:02,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783887643] [2023-08-25 18:25:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:25:02,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:25:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:25:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:25:02,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:25:02,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783887643] [2023-08-25 18:25:02,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783887643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:25:02,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202402070] [2023-08-25 18:25:02,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-25 18:25:02,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:25:02,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:25:02,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-25 18:25:02,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-25 18:25:03,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-25 18:25:03,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-25 18:25:03,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-25 18:25:03,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:25:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:25:03,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:25:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-25 18:25:03,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202402070] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:25:03,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:25:03,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-25 18:25:03,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639361340] [2023-08-25 18:25:03,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:25:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-25 18:25:03,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:25:03,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-25 18:25:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-25 18:25:03,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 427 out of 840 [2023-08-25 18:25:03,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 159 transitions, 369 flow. Second operand has 13 states, 13 states have (on average 428.46153846153845) internal successors, (5570), 13 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:25:03,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:25:03,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 427 of 840 [2023-08-25 18:25:03,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:25:18,560 INFO L124 PetriNetUnfolderBase]: 78187/151073 cut-off events. [2023-08-25 18:25:18,560 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2023-08-25 18:25:19,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255251 conditions, 151073 events. 78187/151073 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 3661. Compared 1714470 event pairs, 73926 based on Foata normal form. 6/130437 useless extension candidates. Maximal degree in co-relation 255191. Up to 102888 conditions per place. [2023-08-25 18:25:19,547 INFO L140 encePairwiseOnDemand]: 837/840 looper letters, 62 selfloop transitions, 11 changer transitions 0/165 dead transitions. [2023-08-25 18:25:19,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 165 transitions, 551 flow [2023-08-25 18:25:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-25 18:25:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-25 18:25:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 5203 transitions. [2023-08-25 18:25:19,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516170634920635 [2023-08-25 18:25:19,557 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 5203 transitions. [2023-08-25 18:25:19,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 5203 transitions. [2023-08-25 18:25:19,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:25:19,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 5203 transitions. [2023-08-25 18:25:19,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 433.5833333333333) internal successors, (5203), 12 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:25:19,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 840.0) internal successors, (10920), 13 states have internal predecessors, (10920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:25:19,583 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 840.0) internal successors, (10920), 13 states have internal predecessors, (10920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:25:19,583 INFO L175 Difference]: Start difference. First operand has 168 places, 159 transitions, 369 flow. Second operand 12 states and 5203 transitions. [2023-08-25 18:25:19,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 165 transitions, 551 flow [2023-08-25 18:25:19,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 165 transitions, 537 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-25 18:25:19,587 INFO L231 Difference]: Finished difference. Result has 184 places, 165 transitions, 439 flow [2023-08-25 18:25:19,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=840, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=439, PETRI_PLACES=184, PETRI_TRANSITIONS=165} [2023-08-25 18:25:19,588 INFO L281 CegarLoopForPetriNet]: 214 programPoint places, -30 predicate places. [2023-08-25 18:25:19,588 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 165 transitions, 439 flow [2023-08-25 18:25:19,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 428.46153846153845) internal successors, (5570), 13 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-25 18:25:19,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:25:19,590 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-25 18:25:19,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-25 18:25:19,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:25:19,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:25:19,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:25:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1386513593, now seen corresponding path program 3 times [2023-08-25 18:25:19,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:25:19,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983274885] [2023-08-25 18:25:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:25:19,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:25:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:25:19,839 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:25:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:25:19,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:25:19,882 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:25:19,882 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:25:19,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 18:25:19,883 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-25 18:25:19,883 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:25:19,883 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:25:19,883 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 18:25:19,948 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-25 18:25:19,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 611 transitions, 1266 flow [2023-08-25 18:25:20,459 INFO L124 PetriNetUnfolderBase]: 166/1350 cut-off events. [2023-08-25 18:25:20,459 INFO L125 PetriNetUnfolderBase]: For 48/50 co-relation queries the response was YES. [2023-08-25 18:25:20,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1405 conditions, 1350 events. 166/1350 cut-off events. For 48/50 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 8105 event pairs, 6 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 975. Up to 32 conditions per place. [2023-08-25 18:25:20,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 542 places, 611 transitions, 1266 flow [2023-08-25 18:25:20,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 542 places, 611 transitions, 1266 flow [2023-08-25 18:25:20,508 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:25:20,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 542 places, 611 transitions, 1266 flow [2023-08-25 18:25:20,509 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 542 places, 611 transitions, 1266 flow [2023-08-25 18:25:20,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 542 places, 611 transitions, 1266 flow [2023-08-25 18:25:20,799 INFO L124 PetriNetUnfolderBase]: 166/1350 cut-off events. [2023-08-25 18:25:20,799 INFO L125 PetriNetUnfolderBase]: For 48/50 co-relation queries the response was YES. [2023-08-25 18:25:20,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1405 conditions, 1350 events. 166/1350 cut-off events. For 48/50 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 8105 event pairs, 6 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 975. Up to 32 conditions per place. [2023-08-25 18:25:21,000 INFO L119 LiptonReduction]: Number of co-enabled transitions 256368