/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:02:10,615 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:02:10,700 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 [2023-08-24 00:02:10,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:02:10,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:02:10,738 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:02:10,739 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:02:10,739 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:02:10,740 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:02:10,744 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:02:10,744 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:02:10,744 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:02:10,744 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:02:10,746 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:02:10,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:02:10,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:02:10,746 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:02:10,746 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:02:10,747 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:02:10,747 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:02:10,747 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:02:10,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:02:10,748 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:02:10,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:02:10,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:02:10,749 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:02:10,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:02:10,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:02:10,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:02:10,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:02:10,751 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:02:10,751 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:02:10,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:02:10,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:02:10,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:02:10,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:02:11,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:02:11,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:02:11,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:02:11,149 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:02:11,149 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:02:11,150 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-08-24 00:02:12,372 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:02:12,639 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:02:12,640 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-08-24 00:02:12,660 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c334d2f61/a487aac16a2c45beb12a5ddada08dffd/FLAG403333911 [2023-08-24 00:02:12,673 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c334d2f61/a487aac16a2c45beb12a5ddada08dffd [2023-08-24 00:02:12,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:02:12,678 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:02:12,680 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:02:12,680 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:02:12,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:02:12,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:02:12" (1/1) ... [2023-08-24 00:02:12,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b3844f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:12, skipping insertion in model container [2023-08-24 00:02:12,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:02:12" (1/1) ... [2023-08-24 00:02:12,722 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:02:13,043 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2023-08-24 00:02:13,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:02:13,077 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:02:13,106 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:02:13,108 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:02:13,120 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2023-08-24 00:02:13,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:02:13,179 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:02:13,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13 WrapperNode [2023-08-24 00:02:13,180 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:02:13,181 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:02:13,182 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:02:13,182 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:02:13,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,217 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,244 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2023-08-24 00:02:13,245 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:02:13,245 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:02:13,245 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:02:13,246 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:02:13,254 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,267 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,268 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,284 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,291 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,292 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,293 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,295 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:02:13,296 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:02:13,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:02:13,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:02:13,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (1/1) ... [2023-08-24 00:02:13,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:02:13,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:02:13,334 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) [2023-08-24 00:02:13,351 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 [2023-08-24 00:02:13,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:02:13,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:02:13,377 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:02:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:02:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:02:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:02:13,378 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:02:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:02:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:02:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:02:13,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:02:13,380 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 00:02:13,521 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:02:13,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:02:13,707 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:02:13,714 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:02:13,714 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-24 00:02:13,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:02:13 BoogieIcfgContainer [2023-08-24 00:02:13,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:02:13,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:02:13,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:02:13,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:02:13,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:02:12" (1/3) ... [2023-08-24 00:02:13,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30774628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:02:13, skipping insertion in model container [2023-08-24 00:02:13,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:13" (2/3) ... [2023-08-24 00:02:13,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30774628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:02:13, skipping insertion in model container [2023-08-24 00:02:13,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:02:13" (3/3) ... [2023-08-24 00:02:13,724 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2023-08-24 00:02:13,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:02:13,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 00:02:13,741 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:02:13,805 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:02:13,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 113 transitions, 234 flow [2023-08-24 00:02:13,957 INFO L124 PetriNetUnfolderBase]: 17/150 cut-off events. [2023-08-24 00:02:13,958 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:02:13,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 150 events. 17/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 356 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-24 00:02:13,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 113 transitions, 234 flow [2023-08-24 00:02:13,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 108 transitions, 221 flow [2023-08-24 00:02:13,975 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:02:13,997 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 108 transitions, 221 flow [2023-08-24 00:02:13,999 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 108 transitions, 221 flow [2023-08-24 00:02:14,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 108 transitions, 221 flow [2023-08-24 00:02:14,053 INFO L124 PetriNetUnfolderBase]: 16/145 cut-off events. [2023-08-24 00:02:14,053 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:14,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 16/145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 341 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-24 00:02:14,056 INFO L119 LiptonReduction]: Number of co-enabled transitions 2752 [2023-08-24 00:02:17,228 INFO L134 LiptonReduction]: Checked pairs total: 4924 [2023-08-24 00:02:17,229 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-24 00:02:17,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:02:17,251 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;@2ab6ce5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:02:17,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:02:17,255 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:02:17,255 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-24 00:02:17,255 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:17,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:17,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:02:17,256 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:17,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash 13311391, now seen corresponding path program 1 times [2023-08-24 00:02:17,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:17,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137526463] [2023-08-24 00:02:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:17,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:17,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:17,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137526463] [2023-08-24 00:02:17,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137526463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:02:17,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:02:17,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:02:17,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763971334] [2023-08-24 00:02:17,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:02:17,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:02:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:17,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:02:17,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:02:17,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 204 [2023-08-24 00:02:17,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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) [2023-08-24 00:02:17,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:17,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 204 [2023-08-24 00:02:17,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:17,604 INFO L124 PetriNetUnfolderBase]: 80/188 cut-off events. [2023-08-24 00:02:17,604 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:17,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 641 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2023-08-24 00:02:17,607 INFO L140 encePairwiseOnDemand]: 192/204 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-08-24 00:02:17,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-08-24 00:02:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:02:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:02:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-24 00:02:17,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228758169934641 [2023-08-24 00:02:17,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-24 00:02:17,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-24 00:02:17,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:17,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-24 00:02:17,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2023-08-24 00:02:17,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2023-08-24 00:02:17,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2023-08-24 00:02:17,648 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 320 transitions. [2023-08-24 00:02:17,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-08-24 00:02:17,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:02:17,652 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-08-24 00:02:17,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-24 00:02:17,659 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-24 00:02:17,660 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-08-24 00:02:17,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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) [2023-08-24 00:02:17,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:17,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 00:02:17,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:02:17,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:17,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash -104804688, now seen corresponding path program 1 times [2023-08-24 00:02:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:17,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185917349] [2023-08-24 00:02:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:17,716 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:02:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:17,797 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:02:17,797 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:02:17,799 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:02:17,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:02:17,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:02:17,801 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 00:02:17,805 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:02:17,805 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:02:17,840 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:02:17,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 147 transitions, 312 flow [2023-08-24 00:02:17,899 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-24 00:02:17,899 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:02:17,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 731 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-24 00:02:17,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 147 transitions, 312 flow [2023-08-24 00:02:17,905 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 147 transitions, 312 flow [2023-08-24 00:02:17,906 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:02:17,906 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 147 transitions, 312 flow [2023-08-24 00:02:17,906 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 147 transitions, 312 flow [2023-08-24 00:02:17,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 147 transitions, 312 flow [2023-08-24 00:02:17,929 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-24 00:02:17,930 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:02:17,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 731 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-24 00:02:17,938 INFO L119 LiptonReduction]: Number of co-enabled transitions 8256 [2023-08-24 00:02:20,959 INFO L134 LiptonReduction]: Checked pairs total: 17909 [2023-08-24 00:02:20,960 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-24 00:02:20,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:02:20,963 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;@2ab6ce5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:02:20,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:02:20,965 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:02:20,965 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 00:02:20,965 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:20,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:20,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:02:20,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:20,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash 22298088, now seen corresponding path program 1 times [2023-08-24 00:02:20,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:20,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136967408] [2023-08-24 00:02:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:20,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:21,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:21,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136967408] [2023-08-24 00:02:21,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136967408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:02:21,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:02:21,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:02:21,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320870021] [2023-08-24 00:02:21,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:02:21,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:02:21,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:21,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:02:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:02:21,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 258 [2023-08-24 00:02:21,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-08-24 00:02:21,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:21,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 258 [2023-08-24 00:02:21,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:21,306 INFO L124 PetriNetUnfolderBase]: 1642/2949 cut-off events. [2023-08-24 00:02:21,307 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:02:21,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 17499 event pairs, 752 based on Foata normal form. 428/3078 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2023-08-24 00:02:21,322 INFO L140 encePairwiseOnDemand]: 241/258 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2023-08-24 00:02:21,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-24 00:02:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:02:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:02:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-24 00:02:21,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2023-08-24 00:02:21,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-24 00:02:21,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-24 00:02:21,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:21,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-24 00:02:21,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2023-08-24 00:02:21,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-08-24 00:02:21,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 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) [2023-08-24 00:02:21,329 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 414 transitions. [2023-08-24 00:02:21,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-24 00:02:21,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:02:21,331 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2023-08-24 00:02:21,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-24 00:02:21,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-24 00:02:21,332 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2023-08-24 00:02:21,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-08-24 00:02:21,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:21,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:02:21,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 00:02:21,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:21,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash -21976029, now seen corresponding path program 1 times [2023-08-24 00:02:21,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:21,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060842349] [2023-08-24 00:02:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:21,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:21,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:21,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060842349] [2023-08-24 00:02:21,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060842349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:02:21,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711301476] [2023-08-24 00:02:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:21,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:02:21,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:02:21,433 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) [2023-08-24 00:02:21,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 00:02:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:21,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:02:21,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:02:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:21,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:02:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:21,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711301476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:02:21,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:02:21,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:02:21,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491641311] [2023-08-24 00:02:21,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:02:21,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:02:21,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:02:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:02:21,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 258 [2023-08-24 00:02:21,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 119.28571428571429) internal successors, (835), 7 states have internal predecessors, (835), 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) [2023-08-24 00:02:21,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:21,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 258 [2023-08-24 00:02:21,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:21,745 INFO L124 PetriNetUnfolderBase]: 376/769 cut-off events. [2023-08-24 00:02:21,746 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-24 00:02:21,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3928 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2023-08-24 00:02:21,751 INFO L140 encePairwiseOnDemand]: 255/258 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-24 00:02:21,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2023-08-24 00:02:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:02:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:02:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 635 transitions. [2023-08-24 00:02:21,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49224806201550386 [2023-08-24 00:02:21,754 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 635 transitions. [2023-08-24 00:02:21,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 635 transitions. [2023-08-24 00:02:21,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:21,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 635 transitions. [2023-08-24 00:02:21,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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) [2023-08-24 00:02:21,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-08-24 00:02:21,759 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 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) [2023-08-24 00:02:21,760 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 635 transitions. [2023-08-24 00:02:21,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2023-08-24 00:02:21,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:02:21,763 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-24 00:02:21,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-24 00:02:21,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-08-24 00:02:21,764 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-24 00:02:21,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.28571428571429) internal successors, (835), 7 states have internal predecessors, (835), 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) [2023-08-24 00:02:21,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:21,765 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 00:02:21,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 00:02:21,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:02:21,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:21,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2078806508, now seen corresponding path program 1 times [2023-08-24 00:02:21,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:21,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383160003] [2023-08-24 00:02:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:22,038 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:02:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:22,064 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:02:22,065 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:02:22,065 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:02:22,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:02:22,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:02:22,065 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:02:22,066 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:02:22,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:02:22,098 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:02:22,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 181 transitions, 392 flow [2023-08-24 00:02:22,171 INFO L124 PetriNetUnfolderBase]: 50/375 cut-off events. [2023-08-24 00:02:22,171 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:02:22,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 375 events. 50/375 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1256 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-24 00:02:22,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 181 transitions, 392 flow [2023-08-24 00:02:22,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 181 transitions, 392 flow [2023-08-24 00:02:22,179 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:02:22,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 181 transitions, 392 flow [2023-08-24 00:02:22,180 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 181 transitions, 392 flow [2023-08-24 00:02:22,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 181 transitions, 392 flow [2023-08-24 00:02:22,224 INFO L124 PetriNetUnfolderBase]: 50/375 cut-off events. [2023-08-24 00:02:22,224 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:02:22,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 375 events. 50/375 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1256 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-08-24 00:02:22,243 INFO L119 LiptonReduction]: Number of co-enabled transitions 15744 [2023-08-24 00:02:26,474 INFO L134 LiptonReduction]: Checked pairs total: 37929 [2023-08-24 00:02:26,475 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-24 00:02:26,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:02:26,477 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;@2ab6ce5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:02:26,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:02:26,479 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:02:26,480 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:02:26,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:26,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:26,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:02:26,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:26,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash 32918286, now seen corresponding path program 1 times [2023-08-24 00:02:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:26,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867223369] [2023-08-24 00:02:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:26,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:26,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:26,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867223369] [2023-08-24 00:02:26,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867223369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:02:26,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:02:26,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:02:26,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238132096] [2023-08-24 00:02:26,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:02:26,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:02:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:02:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:02:26,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 311 [2023-08-24 00:02:26,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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) [2023-08-24 00:02:26,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:26,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 311 [2023-08-24 00:02:26,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:30,101 INFO L124 PetriNetUnfolderBase]: 32280/46590 cut-off events. [2023-08-24 00:02:30,102 INFO L125 PetriNetUnfolderBase]: For 1317/1317 co-relation queries the response was YES. [2023-08-24 00:02:30,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92819 conditions, 46590 events. 32280/46590 cut-off events. For 1317/1317 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 303274 event pairs, 21006 based on Foata normal form. 5103/47961 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-08-24 00:02:30,400 INFO L140 encePairwiseOnDemand]: 288/311 looper letters, 44 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-08-24 00:02:30,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2023-08-24 00:02:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:02:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:02:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-24 00:02:30,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476956055734191 [2023-08-24 00:02:30,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-24 00:02:30,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-24 00:02:30,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:30,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-24 00:02:30,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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) [2023-08-24 00:02:30,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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) [2023-08-24 00:02:30,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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) [2023-08-24 00:02:30,407 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 511 transitions. [2023-08-24 00:02:30,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2023-08-24 00:02:30,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:02:30,413 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2023-08-24 00:02:30,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-24 00:02:30,416 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-24 00:02:30,417 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2023-08-24 00:02:30,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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) [2023-08-24 00:02:30,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:30,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:02:30,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:02:30,419 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:30,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:30,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1134552862, now seen corresponding path program 1 times [2023-08-24 00:02:30,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:30,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996785267] [2023-08-24 00:02:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:30,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:30,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996785267] [2023-08-24 00:02:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996785267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:02:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852360475] [2023-08-24 00:02:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:30,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:02:30,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:02:30,477 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) [2023-08-24 00:02:30,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 00:02:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:30,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:02:30,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:02:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:30,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:02:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:30,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852360475] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:02:30,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:02:30,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:02:30,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407429799] [2023-08-24 00:02:30,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:02:30,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:02:30,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:30,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:02:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:02:30,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 311 [2023-08-24 00:02:30,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 145.28571428571428) internal successors, (1017), 7 states have internal predecessors, (1017), 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) [2023-08-24 00:02:30,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:30,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 311 [2023-08-24 00:02:30,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:31,463 INFO L124 PetriNetUnfolderBase]: 7582/12187 cut-off events. [2023-08-24 00:02:31,463 INFO L125 PetriNetUnfolderBase]: For 4374/4374 co-relation queries the response was YES. [2023-08-24 00:02:31,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81308 event pairs, 0 based on Foata normal form. 1098/13285 useless extension candidates. Maximal degree in co-relation 3138. Up to 7322 conditions per place. [2023-08-24 00:02:31,525 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-08-24 00:02:31,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 411 flow [2023-08-24 00:02:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:02:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:02:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 952 transitions. [2023-08-24 00:02:31,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101822079314041 [2023-08-24 00:02:31,528 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 952 transitions. [2023-08-24 00:02:31,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 952 transitions. [2023-08-24 00:02:31,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:31,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 952 transitions. [2023-08-24 00:02:31,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 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) [2023-08-24 00:02:31,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 311.0) internal successors, (2177), 7 states have internal predecessors, (2177), 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) [2023-08-24 00:02:31,537 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 311.0) internal successors, (2177), 7 states have internal predecessors, (2177), 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) [2023-08-24 00:02:31,537 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 952 transitions. [2023-08-24 00:02:31,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 411 flow [2023-08-24 00:02:31,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 403 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 00:02:31,555 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-24 00:02:31,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-24 00:02:31,557 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-08-24 00:02:31,557 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-24 00:02:31,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 145.28571428571428) internal successors, (1017), 7 states have internal predecessors, (1017), 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) [2023-08-24 00:02:31,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:31,560 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 00:02:31,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 00:02:31,766 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,SelfDestructingSolverStorable6 [2023-08-24 00:02:31,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:31,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash -194687650, now seen corresponding path program 1 times [2023-08-24 00:02:31,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:31,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595955755] [2023-08-24 00:02:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:31,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:31,782 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:02:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:31,794 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:02:31,794 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:02:31,794 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:02:31,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:02:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 00:02:31,795 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:02:31,796 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:02:31,796 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:02:31,816 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:02:31,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 215 transitions, 474 flow [2023-08-24 00:02:31,868 INFO L124 PetriNetUnfolderBase]: 81/572 cut-off events. [2023-08-24 00:02:31,868 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:02:31,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 572 events. 81/572 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2194 event pairs, 6 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2023-08-24 00:02:31,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 215 transitions, 474 flow [2023-08-24 00:02:31,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 215 transitions, 474 flow [2023-08-24 00:02:31,877 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:02:31,877 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 215 transitions, 474 flow [2023-08-24 00:02:31,878 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 215 transitions, 474 flow [2023-08-24 00:02:31,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 215 transitions, 474 flow [2023-08-24 00:02:31,927 INFO L124 PetriNetUnfolderBase]: 81/572 cut-off events. [2023-08-24 00:02:31,927 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:02:31,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 572 events. 81/572 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2194 event pairs, 6 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2023-08-24 00:02:31,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 25472 [2023-08-24 00:02:34,917 INFO L134 LiptonReduction]: Checked pairs total: 57900 [2023-08-24 00:02:34,917 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-24 00:02:34,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:02:34,920 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;@2ab6ce5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:02:34,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:02:34,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:02:34,922 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 00:02:34,922 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:34,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:34,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:02:34,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:34,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:34,923 INFO L85 PathProgramCache]: Analyzing trace with hash 45265308, now seen corresponding path program 1 times [2023-08-24 00:02:34,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:34,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851620304] [2023-08-24 00:02:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:34,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:34,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:34,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851620304] [2023-08-24 00:02:34,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851620304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:02:34,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:02:34,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:02:34,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674477180] [2023-08-24 00:02:34,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:02:34,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:02:34,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:34,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:02:34,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:02:34,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 367 [2023-08-24 00:02:34,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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) [2023-08-24 00:02:34,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:34,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 367 [2023-08-24 00:02:34,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:22,012 INFO L124 PetriNetUnfolderBase]: 411276/560855 cut-off events. [2023-08-24 00:03:22,013 INFO L125 PetriNetUnfolderBase]: For 20805/20805 co-relation queries the response was YES. [2023-08-24 00:03:23,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107559 conditions, 560855 events. 411276/560855 cut-off events. For 20805/20805 co-relation queries the response was YES. Maximal size of possible extension queue 10500. Compared 4242969 event pairs, 397881 based on Foata normal form. 85320/609167 useless extension candidates. Maximal degree in co-relation 94004. Up to 535317 conditions per place. [2023-08-24 00:03:25,233 INFO L140 encePairwiseOnDemand]: 338/367 looper letters, 54 selfloop transitions, 2 changer transitions 11/78 dead transitions. [2023-08-24 00:03:25,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 332 flow [2023-08-24 00:03:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:03:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:03:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2023-08-24 00:03:25,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504087193460491 [2023-08-24 00:03:25,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2023-08-24 00:03:25,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2023-08-24 00:03:25,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:25,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2023-08-24 00:03:25,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 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) [2023-08-24 00:03:25,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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) [2023-08-24 00:03:25,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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) [2023-08-24 00:03:25,240 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 606 transitions. [2023-08-24 00:03:25,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 332 flow [2023-08-24 00:03:25,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:03:25,251 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 156 flow [2023-08-24 00:03:25,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-08-24 00:03:25,252 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-24 00:03:25,252 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 156 flow [2023-08-24 00:03:25,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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) [2023-08-24 00:03:25,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:25,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:03:25,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 00:03:25,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:25,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:25,253 INFO L85 PathProgramCache]: Analyzing trace with hash -942296797, now seen corresponding path program 1 times [2023-08-24 00:03:25,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:25,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950684129] [2023-08-24 00:03:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:25,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:03:25,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950684129] [2023-08-24 00:03:25,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950684129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:03:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783919735] [2023-08-24 00:03:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:25,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:03:25,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:03:25,337 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) [2023-08-24 00:03:25,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 00:03:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:25,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:03:25,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:03:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:03:25,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:03:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:03:25,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783919735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:03:25,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:03:25,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:03:25,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992211198] [2023-08-24 00:03:25,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:03:25,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:03:25,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:03:25,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:03:25,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 367 [2023-08-24 00:03:25,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 171.28571428571428) internal successors, (1199), 7 states have internal predecessors, (1199), 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) [2023-08-24 00:03:25,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:25,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 367 [2023-08-24 00:03:25,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:46,178 INFO L124 PetriNetUnfolderBase]: 191482/256657 cut-off events. [2023-08-24 00:03:46,178 INFO L125 PetriNetUnfolderBase]: For 22240/22240 co-relation queries the response was YES. [2023-08-24 00:03:46,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533262 conditions, 256657 events. 191482/256657 cut-off events. For 22240/22240 co-relation queries the response was YES. Maximal size of possible extension queue 5456. Compared 1793649 event pairs, 7920 based on Foata normal form. 1110/257766 useless extension candidates. Maximal degree in co-relation 54456. Up to 163477 conditions per place. [2023-08-24 00:03:47,741 INFO L140 encePairwiseOnDemand]: 363/367 looper letters, 136 selfloop transitions, 6 changer transitions 0/153 dead transitions. [2023-08-24 00:03:47,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 153 transitions, 636 flow [2023-08-24 00:03:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:03:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:03:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1159 transitions. [2023-08-24 00:03:47,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263396911898274 [2023-08-24 00:03:47,749 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1159 transitions. [2023-08-24 00:03:47,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1159 transitions. [2023-08-24 00:03:47,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:47,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1159 transitions. [2023-08-24 00:03:47,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.16666666666666) internal successors, (1159), 6 states have internal predecessors, (1159), 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) [2023-08-24 00:03:47,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 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) [2023-08-24 00:03:47,755 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 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) [2023-08-24 00:03:47,755 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 156 flow. Second operand 6 states and 1159 transitions. [2023-08-24 00:03:47,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 153 transitions, 636 flow [2023-08-24 00:03:47,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 153 transitions, 622 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:03:47,830 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-24 00:03:47,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-24 00:03:47,831 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-24 00:03:47,831 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-24 00:03:47,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 171.28571428571428) internal successors, (1199), 7 states have internal predecessors, (1199), 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) [2023-08-24 00:03:47,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:47,832 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 00:03:47,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 00:03:48,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:03:48,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:48,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1754103210, now seen corresponding path program 1 times [2023-08-24 00:03:48,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:48,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372095218] [2023-08-24 00:03:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:48,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:48,050 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:03:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:48,065 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:03:48,065 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:03:48,065 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:03:48,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:03:48,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:03:48,065 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:03:48,066 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:03:48,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 00:03:48,092 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 00:03:48,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 249 transitions, 558 flow [2023-08-24 00:03:48,199 INFO L124 PetriNetUnfolderBase]: 140/909 cut-off events. [2023-08-24 00:03:48,199 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 00:03:48,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 909 events. 140/909 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4087 event pairs, 23 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 617. Up to 80 conditions per place. [2023-08-24 00:03:48,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 249 transitions, 558 flow [2023-08-24 00:03:48,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 249 transitions, 558 flow [2023-08-24 00:03:48,222 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:03:48,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 249 transitions, 558 flow [2023-08-24 00:03:48,222 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 249 transitions, 558 flow [2023-08-24 00:03:48,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 249 transitions, 558 flow [2023-08-24 00:03:48,323 INFO L124 PetriNetUnfolderBase]: 140/909 cut-off events. [2023-08-24 00:03:48,323 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 00:03:48,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 909 events. 140/909 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4087 event pairs, 23 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 617. Up to 80 conditions per place. [2023-08-24 00:03:48,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 37440 [2023-08-24 00:03:51,727 INFO L134 LiptonReduction]: Checked pairs total: 101347 [2023-08-24 00:03:51,728 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-24 00:03:51,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:03:51,729 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;@2ab6ce5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:03:51,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:03:51,731 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:03:51,731 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 00:03:51,731 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:03:51,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:51,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:03:51,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:51,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash 59174997, now seen corresponding path program 1 times [2023-08-24 00:03:51,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:51,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515914649] [2023-08-24 00:03:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:51,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:03:51,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:51,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515914649] [2023-08-24 00:03:51,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515914649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:03:51,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:03:51,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:03:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934348686] [2023-08-24 00:03:51,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:03:51,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:03:51,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:03:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:03:51,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 418 [2023-08-24 00:03:51,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 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) [2023-08-24 00:03:51,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:51,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 418 [2023-08-24 00:03:51,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand