/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_73-funloop_hard_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:21:32,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:21:32,607 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 18:21:32,612 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:21:32,613 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:21:32,641 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:21:32,642 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:21:32,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:21:32,643 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:21:32,647 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:21:32,647 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:21:32,647 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:21:32,648 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:21:32,649 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:21:32,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:21:32,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:21:32,650 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:21:32,650 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:21:32,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:21:32,650 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:21:32,651 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:21:32,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:21:32,653 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:21:32,654 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:21:32,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:21:32,654 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:21:32,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:21:32,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:21:32,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:21:32,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:21:32,656 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:21:32,656 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:21:32,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:21:32,657 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:21:32,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:21:32,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:21:32,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:21:32,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:21:32,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:21:33,000 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:21:33,001 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:21:33,002 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-25 18:21:34,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:21:34,459 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:21:34,460 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-08-25 18:21:34,475 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/725bd6687/8bd05f5e382c40d1bfd37fbe2d8746f2/FLAGf6193475e [2023-08-25 18:21:34,486 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/725bd6687/8bd05f5e382c40d1bfd37fbe2d8746f2 [2023-08-25 18:21:34,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:21:34,490 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:21:34,491 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:21:34,491 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:21:34,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:21:34,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:21:34" (1/1) ... [2023-08-25 18:21:34,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69aa2266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:34, skipping insertion in model container [2023-08-25 18:21:34,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:21:34" (1/1) ... [2023-08-25 18:21:34,538 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:21:35,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:21:35,034 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:21:35,060 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:21:35,062 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:21:35,067 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-25 18:21:35,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:21:35,174 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:21:35,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35 WrapperNode [2023-08-25 18:21:35,174 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:21:35,176 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:21:35,176 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:21:35,176 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:21:35,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,211 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,248 INFO L138 Inliner]: procedures = 271, calls = 42, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 354 [2023-08-25 18:21:35,249 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:21:35,249 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:21:35,249 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:21:35,249 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:21:35,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,267 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,267 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,298 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,324 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,328 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:21:35,329 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:21:35,329 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:21:35,329 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:21:35,330 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (1/1) ... [2023-08-25 18:21:35,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:21:35,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:35,356 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 18:21:35,366 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 18:21:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:21:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:21:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:21:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:21:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:21:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:21:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:21:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:21:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:21:35,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:21:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:21:35,390 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 18:21:35,516 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:21:35,517 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:21:35,924 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:21:35,931 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:21:35,931 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-25 18:21:35,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:21:35 BoogieIcfgContainer [2023-08-25 18:21:35,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:21:35,935 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:21:35,935 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:21:35,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:21:35,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:21:34" (1/3) ... [2023-08-25 18:21:35,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3240f7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:21:35, skipping insertion in model container [2023-08-25 18:21:35,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:21:35" (2/3) ... [2023-08-25 18:21:35,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3240f7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:21:35, skipping insertion in model container [2023-08-25 18:21:35,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:21:35" (3/3) ... [2023-08-25 18:21:35,940 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-08-25 18:21:35,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:21:35,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-08-25 18:21:35,956 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:21:36,034 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 18:21:36,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 369 transitions, 746 flow [2023-08-25 18:21:36,215 INFO L124 PetriNetUnfolderBase]: 78/588 cut-off events. [2023-08-25 18:21:36,215 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 18:21:36,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 588 events. 78/588 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3217 event pairs, 0 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 331. Up to 8 conditions per place. [2023-08-25 18:21:36,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 324 places, 369 transitions, 746 flow [2023-08-25 18:21:36,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 364 transitions, 733 flow [2023-08-25 18:21:36,271 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:21:36,280 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 364 transitions, 733 flow [2023-08-25 18:21:36,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 364 transitions, 733 flow [2023-08-25 18:21:36,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 364 transitions, 733 flow [2023-08-25 18:21:36,380 INFO L124 PetriNetUnfolderBase]: 77/583 cut-off events. [2023-08-25 18:21:36,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:21:36,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 583 events. 77/583 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3164 event pairs, 0 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 331. Up to 8 conditions per place. [2023-08-25 18:21:36,413 INFO L119 LiptonReduction]: Number of co-enabled transitions 48150 [2023-08-25 18:21:39,818 INFO L134 LiptonReduction]: Checked pairs total: 188918 [2023-08-25 18:21:39,819 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-08-25 18:21:39,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:21:39,836 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;@59e4b7a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:21:39,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:21:39,840 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:21:39,840 INFO L124 PetriNetUnfolderBase]: 9/40 cut-off events. [2023-08-25 18:21:39,840 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:21:39,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:39,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-25 18:21:39,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:39,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1653060188, now seen corresponding path program 1 times [2023-08-25 18:21:39,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:39,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458552812] [2023-08-25 18:21:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:39,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:40,029 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 18:21:40,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:40,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458552812] [2023-08-25 18:21:40,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458552812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 18:21:40,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 18:21:40,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 18:21:40,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814414336] [2023-08-25 18:21:40,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 18:21:40,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 18:21:40,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 18:21:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 18:21:40,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 595 [2023-08-25 18:21:40,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 195 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 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 18:21:40,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:40,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 595 [2023-08-25 18:21:40,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:40,516 INFO L124 PetriNetUnfolderBase]: 883/3126 cut-off events. [2023-08-25 18:21:40,516 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:21:40,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4777 conditions, 3126 events. 883/3126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 26237 event pairs, 741 based on Foata normal form. 393/3164 useless extension candidates. Maximal degree in co-relation 4614. Up to 1644 conditions per place. [2023-08-25 18:21:40,526 INFO L140 encePairwiseOnDemand]: 558/595 looper letters, 26 selfloop transitions, 2 changer transitions 103/162 dead transitions. [2023-08-25 18:21:40,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 162 transitions, 459 flow [2023-08-25 18:21:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 18:21:40,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 18:21:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1045 transitions. [2023-08-25 18:21:40,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854341736694678 [2023-08-25 18:21:40,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1045 transitions. [2023-08-25 18:21:40,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1045 transitions. [2023-08-25 18:21:40,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:40,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1045 transitions. [2023-08-25 18:21:40,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.3333333333333) internal successors, (1045), 3 states have internal predecessors, (1045), 0 states have call successors, (0), 0 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 18:21:40,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 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 18:21:40,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 595.0) internal successors, (2380), 4 states have internal predecessors, (2380), 0 states have call successors, (0), 0 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 18:21:40,570 INFO L175 Difference]: Start difference. First operand has 159 places, 195 transitions, 395 flow. Second operand 3 states and 1045 transitions. [2023-08-25 18:21:40,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 162 transitions, 459 flow [2023-08-25 18:21:40,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 162 transitions, 459 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 18:21:40,577 INFO L231 Difference]: Finished difference. Result has 161 places, 59 transitions, 133 flow [2023-08-25 18:21:40,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=161, PETRI_TRANSITIONS=59} [2023-08-25 18:21:40,582 INFO L281 CegarLoopForPetriNet]: 159 programPoint places, 2 predicate places. [2023-08-25 18:21:40,583 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 59 transitions, 133 flow [2023-08-25 18:21:40,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 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 18:21:40,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:40,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-25 18:21:40,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:21:40,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:40,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1159682808, now seen corresponding path program 1 times [2023-08-25 18:21:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979784017] [2023-08-25 18:21:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:40,692 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 18:21:40,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:40,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979784017] [2023-08-25 18:21:40,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979784017] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:21:40,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079643058] [2023-08-25 18:21:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:40,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:21:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:40,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-25 18:21:40,719 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 18:21:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:40,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-25 18:21:40,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:21:40,841 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 18:21:40,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:21:40,863 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 18:21:40,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079643058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:21:40,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:21:40,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-25 18:21:40,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979518474] [2023-08-25 18:21:40,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:21:40,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-25 18:21:40,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:40,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-25 18:21:40,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-25 18:21:40,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 595 [2023-08-25 18:21:40,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 59 transitions, 133 flow. Second operand has 7 states, 7 states have (on average 316.57142857142856) internal successors, (2216), 7 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 18:21:40,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:40,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 595 [2023-08-25 18:21:40,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:40,955 INFO L124 PetriNetUnfolderBase]: 66/272 cut-off events. [2023-08-25 18:21:40,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:21:40,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 272 events. 66/272 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 931 event pairs, 57 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 427. Up to 147 conditions per place. [2023-08-25 18:21:40,957 INFO L140 encePairwiseOnDemand]: 592/595 looper letters, 26 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-08-25 18:21:40,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 207 flow [2023-08-25 18:21:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-25 18:21:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-25 18:21:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1924 transitions. [2023-08-25 18:21:40,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5389355742296918 [2023-08-25 18:21:40,962 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1924 transitions. [2023-08-25 18:21:40,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1924 transitions. [2023-08-25 18:21:40,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:40,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1924 transitions. [2023-08-25 18:21:40,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 320.6666666666667) internal successors, (1924), 6 states have internal predecessors, (1924), 0 states have call successors, (0), 0 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 18:21:40,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 595.0) internal successors, (4165), 7 states have internal predecessors, (4165), 0 states have call successors, (0), 0 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 18:21:40,974 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 595.0) internal successors, (4165), 7 states have internal predecessors, (4165), 0 states have call successors, (0), 0 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 18:21:40,974 INFO L175 Difference]: Start difference. First operand has 161 places, 59 transitions, 133 flow. Second operand 6 states and 1924 transitions. [2023-08-25 18:21:40,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 207 flow [2023-08-25 18:21:40,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 203 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-25 18:21:40,976 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 165 flow [2023-08-25 18:21:40,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-08-25 18:21:40,977 INFO L281 CegarLoopForPetriNet]: 159 programPoint places, -91 predicate places. [2023-08-25 18:21:40,978 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 165 flow [2023-08-25 18:21:40,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 316.57142857142856) internal successors, (2216), 7 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 18:21:40,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:40,979 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-25 18:21:40,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-25 18:21:41,185 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 18:21:41,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:41,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash -713358684, now seen corresponding path program 2 times [2023-08-25 18:21:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:41,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568778724] [2023-08-25 18:21:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:41,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:41,342 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 18:21:41,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:41,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568778724] [2023-08-25 18:21:41,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568778724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:21:41,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898938807] [2023-08-25 18:21:41,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-25 18:21:41,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:21:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:41,344 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 18:21:41,347 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 18:21:41,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-25 18:21:41,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-25 18:21:41,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-25 18:21:41,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:21:41,456 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 18:21:41,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:21:41,509 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 18:21:41,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898938807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:21:41,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:21:41,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-25 18:21:41,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946769551] [2023-08-25 18:21:41,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:21:41,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-25 18:21:41,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:41,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-25 18:21:41,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-25 18:21:41,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 595 [2023-08-25 18:21:41,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 165 flow. Second operand has 13 states, 13 states have (on average 316.3076923076923) internal successors, (4112), 13 states have internal predecessors, (4112), 0 states have call successors, (0), 0 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 18:21:41,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:41,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 595 [2023-08-25 18:21:41,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:41,657 INFO L124 PetriNetUnfolderBase]: 66/278 cut-off events. [2023-08-25 18:21:41,658 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-25 18:21:41,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 278 events. 66/278 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 928 event pairs, 57 based on Foata normal form. 6/251 useless extension candidates. Maximal degree in co-relation 418. Up to 147 conditions per place. [2023-08-25 18:21:41,659 INFO L140 encePairwiseOnDemand]: 592/595 looper letters, 26 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2023-08-25 18:21:41,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 68 transitions, 275 flow [2023-08-25 18:21:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-25 18:21:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-25 18:21:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3823 transitions. [2023-08-25 18:21:41,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354341736694678 [2023-08-25 18:21:41,668 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3823 transitions. [2023-08-25 18:21:41,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3823 transitions. [2023-08-25 18:21:41,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:41,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3823 transitions. [2023-08-25 18:21:41,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 318.5833333333333) internal successors, (3823), 12 states have internal predecessors, (3823), 0 states have call successors, (0), 0 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 18:21:41,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 595.0) internal successors, (7735), 13 states have internal predecessors, (7735), 0 states have call successors, (0), 0 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 18:21:41,695 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 595.0) internal successors, (7735), 13 states have internal predecessors, (7735), 0 states have call successors, (0), 0 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 18:21:41,696 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 165 flow. Second operand 12 states and 3823 transitions. [2023-08-25 18:21:41,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 68 transitions, 275 flow [2023-08-25 18:21:41,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 68 transitions, 261 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-25 18:21:41,701 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 235 flow [2023-08-25 18:21:41,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=595, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=235, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-08-25 18:21:41,703 INFO L281 CegarLoopForPetriNet]: 159 programPoint places, -75 predicate places. [2023-08-25 18:21:41,704 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 235 flow [2023-08-25 18:21:41,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 316.3076923076923) internal successors, (4112), 13 states have internal predecessors, (4112), 0 states have call successors, (0), 0 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 18:21:41,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:41,707 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-25 18:21:41,713 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 18:21:41,913 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 18:21:41,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:41,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:41,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1256874532, now seen corresponding path program 3 times [2023-08-25 18:21:41,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:41,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966763637] [2023-08-25 18:21:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:41,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:21:41,939 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:21:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:21:41,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:21:41,995 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:21:41,996 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:21:41,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:21:41,998 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-25 18:21:41,999 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:21:42,000 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:21:42,000 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:21:42,047 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 18:21:42,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 419 places, 478 transitions, 974 flow [2023-08-25 18:21:42,187 INFO L124 PetriNetUnfolderBase]: 126/947 cut-off events. [2023-08-25 18:21:42,187 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:21:42,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 947 events. 126/947 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5983 event pairs, 0 based on Foata normal form. 0/765 useless extension candidates. Maximal degree in co-relation 590. Up to 12 conditions per place. [2023-08-25 18:21:42,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 419 places, 478 transitions, 974 flow [2023-08-25 18:21:42,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 419 places, 478 transitions, 974 flow [2023-08-25 18:21:42,214 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:21:42,214 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 419 places, 478 transitions, 974 flow [2023-08-25 18:21:42,214 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 419 places, 478 transitions, 974 flow [2023-08-25 18:21:42,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 419 places, 478 transitions, 974 flow [2023-08-25 18:21:42,373 INFO L124 PetriNetUnfolderBase]: 126/947 cut-off events. [2023-08-25 18:21:42,373 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:21:42,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 947 events. 126/947 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5983 event pairs, 0 based on Foata normal form. 0/765 useless extension candidates. Maximal degree in co-relation 590. Up to 12 conditions per place. [2023-08-25 18:21:42,432 INFO L119 LiptonReduction]: Number of co-enabled transitions 121552 [2023-08-25 18:21:46,432 INFO L134 LiptonReduction]: Checked pairs total: 484705 [2023-08-25 18:21:46,432 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-25 18:21:46,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:21:46,435 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;@59e4b7a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:21:46,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:21:46,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:21:46,444 INFO L124 PetriNetUnfolderBase]: 36/165 cut-off events. [2023-08-25 18:21:46,444 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 18:21:46,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:46,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 18:21:46,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:46,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:46,445 INFO L85 PathProgramCache]: Analyzing trace with hash 197471233, now seen corresponding path program 1 times [2023-08-25 18:21:46,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:46,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140043660] [2023-08-25 18:21:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:46,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:46,478 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 18:21:46,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:46,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140043660] [2023-08-25 18:21:46,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140043660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 18:21:46,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 18:21:46,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 18:21:46,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461851104] [2023-08-25 18:21:46,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 18:21:46,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 18:21:46,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 18:21:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 18:21:46,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 408 out of 775 [2023-08-25 18:21:46,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 260 transitions, 538 flow. Second operand has 3 states, 3 states have (on average 410.0) internal successors, (1230), 3 states have internal predecessors, (1230), 0 states have call successors, (0), 0 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 18:21:46,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:46,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 408 of 775 [2023-08-25 18:21:46,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:52,860 INFO L124 PetriNetUnfolderBase]: 36096/81889 cut-off events. [2023-08-25 18:21:52,860 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2023-08-25 18:21:53,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133147 conditions, 81889 events. 36096/81889 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 2168. Compared 972356 event pairs, 31635 based on Foata normal form. 9491/80705 useless extension candidates. Maximal degree in co-relation 56945. Up to 51128 conditions per place. [2023-08-25 18:21:53,229 INFO L140 encePairwiseOnDemand]: 730/775 looper letters, 47 selfloop transitions, 2 changer transitions 108/219 dead transitions. [2023-08-25 18:21:53,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 219 transitions, 636 flow [2023-08-25 18:21:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-25 18:21:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-25 18:21:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1357 transitions. [2023-08-25 18:21:53,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836559139784946 [2023-08-25 18:21:53,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1357 transitions. [2023-08-25 18:21:53,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1357 transitions. [2023-08-25 18:21:53,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:53,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1357 transitions. [2023-08-25 18:21:53,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 452.3333333333333) internal successors, (1357), 3 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 18:21:53,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 775.0) internal successors, (3100), 4 states have internal predecessors, (3100), 0 states have call successors, (0), 0 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 18:21:53,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 775.0) internal successors, (3100), 4 states have internal predecessors, (3100), 0 states have call successors, (0), 0 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 18:21:53,241 INFO L175 Difference]: Start difference. First operand has 213 places, 260 transitions, 538 flow. Second operand 3 states and 1357 transitions. [2023-08-25 18:21:53,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 219 transitions, 636 flow [2023-08-25 18:21:53,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 219 transitions, 636 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-25 18:21:53,245 INFO L231 Difference]: Finished difference. Result has 216 places, 111 transitions, 244 flow [2023-08-25 18:21:53,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=775, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=216, PETRI_TRANSITIONS=111} [2023-08-25 18:21:53,246 INFO L281 CegarLoopForPetriNet]: 213 programPoint places, 3 predicate places. [2023-08-25 18:21:53,247 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 111 transitions, 244 flow [2023-08-25 18:21:53,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 410.0) internal successors, (1230), 3 states have internal predecessors, (1230), 0 states have call successors, (0), 0 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 18:21:53,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:53,247 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-25 18:21:53,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:21:53,248 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:53,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash -292193261, now seen corresponding path program 1 times [2023-08-25 18:21:53,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:53,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045080109] [2023-08-25 18:21:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:53,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:53,302 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 18:21:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:53,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045080109] [2023-08-25 18:21:53,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045080109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:21:53,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738555650] [2023-08-25 18:21:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:53,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:21:53,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:53,309 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 18:21:53,331 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 18:21:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:53,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-25 18:21:53,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:21:53,413 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 18:21:53,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:21:53,425 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 18:21:53,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738555650] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:21:53,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:21:53,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-25 18:21:53,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271456762] [2023-08-25 18:21:53,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:21:53,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-25 18:21:53,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-25 18:21:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-25 18:21:53,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 408 out of 775 [2023-08-25 18:21:53,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 111 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 409.7142857142857) internal successors, (2868), 7 states have internal predecessors, (2868), 0 states have call successors, (0), 0 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 18:21:53,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:53,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 408 of 775 [2023-08-25 18:21:53,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:53,902 INFO L124 PetriNetUnfolderBase]: 3042/7381 cut-off events. [2023-08-25 18:21:53,902 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-25 18:21:53,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12049 conditions, 7381 events. 3042/7381 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 61706 event pairs, 2717 based on Foata normal form. 0/6288 useless extension candidates. Maximal degree in co-relation 12036. Up to 4567 conditions per place. [2023-08-25 18:21:53,936 INFO L140 encePairwiseOnDemand]: 772/775 looper letters, 47 selfloop transitions, 5 changer transitions 0/114 dead transitions. [2023-08-25 18:21:53,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 360 flow [2023-08-25 18:21:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-25 18:21:53,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-25 18:21:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2503 transitions. [2023-08-25 18:21:53,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382795698924732 [2023-08-25 18:21:53,943 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2503 transitions. [2023-08-25 18:21:53,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2503 transitions. [2023-08-25 18:21:53,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:53,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2503 transitions. [2023-08-25 18:21:53,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 417.1666666666667) internal successors, (2503), 6 states have internal predecessors, (2503), 0 states have call successors, (0), 0 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 18:21:53,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 775.0) internal successors, (5425), 7 states have internal predecessors, (5425), 0 states have call successors, (0), 0 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 18:21:53,958 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 775.0) internal successors, (5425), 7 states have internal predecessors, (5425), 0 states have call successors, (0), 0 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 18:21:53,958 INFO L175 Difference]: Start difference. First operand has 216 places, 111 transitions, 244 flow. Second operand 6 states and 2503 transitions. [2023-08-25 18:21:53,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 360 flow [2023-08-25 18:21:53,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 114 transitions, 354 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-25 18:21:53,961 INFO L231 Difference]: Finished difference. Result has 120 places, 114 transitions, 274 flow [2023-08-25 18:21:53,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=775, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=120, PETRI_TRANSITIONS=114} [2023-08-25 18:21:53,962 INFO L281 CegarLoopForPetriNet]: 213 programPoint places, -93 predicate places. [2023-08-25 18:21:53,962 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 114 transitions, 274 flow [2023-08-25 18:21:53,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 409.7142857142857) internal successors, (2868), 7 states have internal predecessors, (2868), 0 states have call successors, (0), 0 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 18:21:53,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:53,963 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 18:21:53,971 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 18:21:54,169 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 18:21:54,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:54,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:54,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1700896897, now seen corresponding path program 2 times [2023-08-25 18:21:54,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:54,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515083845] [2023-08-25 18:21:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:21:54,283 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 18:21:54,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:21:54,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515083845] [2023-08-25 18:21:54,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515083845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-25 18:21:54,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013013723] [2023-08-25 18:21:54,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-25 18:21:54,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-25 18:21:54,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:21:54,287 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 18:21:54,291 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 18:21:54,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-25 18:21:54,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-25 18:21:54,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-25 18:21:54,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-25 18:21:54,388 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 18:21:54,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-25 18:21:54,433 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 18:21:54,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013013723] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-25 18:21:54,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-25 18:21:54,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-25 18:21:54,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525538857] [2023-08-25 18:21:54,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-25 18:21:54,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-25 18:21:54,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:21:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-25 18:21:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-25 18:21:54,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 408 out of 775 [2023-08-25 18:21:54,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 114 transitions, 274 flow. Second operand has 13 states, 13 states have (on average 409.38461538461536) internal successors, (5322), 13 states have internal predecessors, (5322), 0 states have call successors, (0), 0 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 18:21:54,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:21:54,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 408 of 775 [2023-08-25 18:21:54,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-25 18:21:55,184 INFO L124 PetriNetUnfolderBase]: 3042/7387 cut-off events. [2023-08-25 18:21:55,184 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-08-25 18:21:55,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12075 conditions, 7387 events. 3042/7387 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 61692 event pairs, 2717 based on Foata normal form. 6/6301 useless extension candidates. Maximal degree in co-relation 12016. Up to 4567 conditions per place. [2023-08-25 18:21:55,217 INFO L140 encePairwiseOnDemand]: 772/775 looper letters, 47 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2023-08-25 18:21:55,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 120 transitions, 426 flow [2023-08-25 18:21:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-25 18:21:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-25 18:21:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4960 transitions. [2023-08-25 18:21:55,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-08-25 18:21:55,230 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4960 transitions. [2023-08-25 18:21:55,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4960 transitions. [2023-08-25 18:21:55,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-25 18:21:55,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4960 transitions. [2023-08-25 18:21:55,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 413.3333333333333) internal successors, (4960), 12 states have internal predecessors, (4960), 0 states have call successors, (0), 0 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 18:21:55,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 775.0) internal successors, (10075), 13 states have internal predecessors, (10075), 0 states have call successors, (0), 0 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 18:21:55,263 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 775.0) internal successors, (10075), 13 states have internal predecessors, (10075), 0 states have call successors, (0), 0 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 18:21:55,263 INFO L175 Difference]: Start difference. First operand has 120 places, 114 transitions, 274 flow. Second operand 12 states and 4960 transitions. [2023-08-25 18:21:55,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 120 transitions, 426 flow [2023-08-25 18:21:55,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 120 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-25 18:21:55,267 INFO L231 Difference]: Finished difference. Result has 136 places, 120 transitions, 344 flow [2023-08-25 18:21:55,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=775, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=344, PETRI_PLACES=136, PETRI_TRANSITIONS=120} [2023-08-25 18:21:55,267 INFO L281 CegarLoopForPetriNet]: 213 programPoint places, -77 predicate places. [2023-08-25 18:21:55,268 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 120 transitions, 344 flow [2023-08-25 18:21:55,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 409.38461538461536) internal successors, (5322), 13 states have internal predecessors, (5322), 0 states have call successors, (0), 0 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 18:21:55,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:21:55,269 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-25 18:21:55,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-25 18:21:55,475 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 18:21:55,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:21:55,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:21:55,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1152620353, now seen corresponding path program 3 times [2023-08-25 18:21:55,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:21:55,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376953230] [2023-08-25 18:21:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:21:55,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:21:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:21:55,507 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:21:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:21:55,528 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:21:55,529 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:21:55,529 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:21:55,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:21:55,529 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-25 18:21:55,530 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:21:55,530 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:21:55,530 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:21:55,588 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 18:21:55,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 514 places, 587 transitions, 1204 flow [2023-08-25 18:21:55,805 INFO L124 PetriNetUnfolderBase]: 179/1351 cut-off events. [2023-08-25 18:21:55,805 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:21:55,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 1351 events. 179/1351 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9039 event pairs, 1 based on Foata normal form. 0/1094 useless extension candidates. Maximal degree in co-relation 955. Up to 16 conditions per place. [2023-08-25 18:21:55,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 514 places, 587 transitions, 1204 flow [2023-08-25 18:21:55,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 514 places, 587 transitions, 1204 flow [2023-08-25 18:21:55,850 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:21:55,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 514 places, 587 transitions, 1204 flow [2023-08-25 18:21:55,851 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 514 places, 587 transitions, 1204 flow [2023-08-25 18:21:55,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 514 places, 587 transitions, 1204 flow [2023-08-25 18:21:56,086 INFO L124 PetriNetUnfolderBase]: 179/1351 cut-off events. [2023-08-25 18:21:56,086 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:21:56,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 1351 events. 179/1351 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9039 event pairs, 1 based on Foata normal form. 0/1094 useless extension candidates. Maximal degree in co-relation 955. Up to 16 conditions per place. [2023-08-25 18:21:56,199 INFO L119 LiptonReduction]: Number of co-enabled transitions 217638 [2023-08-25 18:22:00,468 INFO L134 LiptonReduction]: Checked pairs total: 871668 [2023-08-25 18:22:00,469 INFO L136 LiptonReduction]: Total number of compositions: 361 [2023-08-25 18:22:00,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:22:00,471 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;@59e4b7a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:22:00,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:22:00,487 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:22:00,487 INFO L124 PetriNetUnfolderBase]: 64/313 cut-off events. [2023-08-25 18:22:00,487 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-25 18:22:00,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:22:00,487 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-25 18:22:00,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:22:00,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:22:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1373252070, now seen corresponding path program 1 times [2023-08-25 18:22:00,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:22:00,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092121432] [2023-08-25 18:22:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:22:00,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:22:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-25 18:22:00,516 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 18:22:00,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-25 18:22:00,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092121432] [2023-08-25 18:22:00,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092121432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-25 18:22:00,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-25 18:22:00,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-25 18:22:00,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172407926] [2023-08-25 18:22:00,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-25 18:22:00,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-25 18:22:00,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-25 18:22:00,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-25 18:22:00,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-25 18:22:00,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 501 out of 948 [2023-08-25 18:22:00,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 324 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 503.3333333333333) internal successors, (1510), 3 states have internal predecessors, (1510), 0 states have call successors, (0), 0 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 18:22:00,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-25 18:22:00,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 501 of 948 [2023-08-25 18:22:00,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand