/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_02-simple_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 23:53:06,744 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 23:53:06,815 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 [2023-08-23 23:53:06,820 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 23:53:06,821 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 23:53:06,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 23:53:06,861 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 23:53:06,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 23:53:06,862 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 23:53:06,865 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 23:53:06,866 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 23:53:06,866 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 23:53:06,866 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 23:53:06,867 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 23:53:06,867 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 23:53:06,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 23:53:06,868 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 23:53:06,868 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 23:53:06,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 23:53:06,868 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 23:53:06,869 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 23:53:06,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 23:53:06,871 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 23:53:06,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 23:53:06,871 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 23:53:06,871 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 23:53:06,871 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 23:53:06,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:53:06,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 23:53:06,872 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 23:53:06,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 23:53:06,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 23:53:06,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 23:53:06,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 23:53:06,874 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 23:53:06,874 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 23:53:07,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 23:53:07,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 23:53:07,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 23:53:07,202 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 23:53:07,204 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 23:53:07,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-08-23 23:53:08,423 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 23:53:08,745 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 23:53:08,746 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-08-23 23:53:08,765 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3563c47/f6b23533d583461a8351cdb0343be024/FLAG3e48ea689 [2023-08-23 23:53:08,781 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3563c47/f6b23533d583461a8351cdb0343be024 [2023-08-23 23:53:08,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 23:53:08,788 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 23:53:08,790 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 23:53:08,790 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 23:53:08,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 23:53:08,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:53:08" (1/1) ... [2023-08-23 23:53:08,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2cf2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:08, skipping insertion in model container [2023-08-23 23:53:08,795 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:53:08" (1/1) ... [2023-08-23 23:53:08,842 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 23:53:09,119 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_02-simple_racefree.i[30176,30189] [2023-08-23 23:53:09,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:53:09,148 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 23:53:09,177 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-23 23:53:09,179 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-23 23:53:09,200 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_02-simple_racefree.i[30176,30189] [2023-08-23 23:53:09,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:53:09,256 INFO L206 MainTranslator]: Completed translation [2023-08-23 23:53:09,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09 WrapperNode [2023-08-23 23:53:09,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 23:53:09,257 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 23:53:09,258 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 23:53:09,258 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 23:53:09,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,290 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,310 INFO L138 Inliner]: procedures = 170, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2023-08-23 23:53:09,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 23:53:09,311 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 23:53:09,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 23:53:09,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 23:53:09,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,324 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,324 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,332 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,335 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,337 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,338 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,340 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 23:53:09,353 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 23:53:09,354 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 23:53:09,354 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 23:53:09,354 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (1/1) ... [2023-08-23 23:53:09,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:53:09,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:53:09,380 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) [2023-08-23 23:53:09,384 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 [2023-08-23 23:53:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 23:53:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 23:53:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-23 23:53:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 23:53:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 23:53:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-23 23:53:09,408 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-23 23:53:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 23:53:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 23:53:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 23:53:09,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 23:53:09,410 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 23:53:09,567 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 23:53:09,571 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 23:53:09,824 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 23:53:09,832 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 23:53:09,832 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-23 23:53:09,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:53:09 BoogieIcfgContainer [2023-08-23 23:53:09,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 23:53:09,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 23:53:09,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 23:53:09,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 23:53:09,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 11:53:08" (1/3) ... [2023-08-23 23:53:09,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75215c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:53:09, skipping insertion in model container [2023-08-23 23:53:09,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:53:09" (2/3) ... [2023-08-23 23:53:09,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75215c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:53:09, skipping insertion in model container [2023-08-23 23:53:09,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:53:09" (3/3) ... [2023-08-23 23:53:09,843 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2023-08-23 23:53:09,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 23:53:09,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 23:53:09,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 23:53:09,935 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-23 23:53:09,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 110 transitions, 228 flow [2023-08-23 23:53:10,063 INFO L124 PetriNetUnfolderBase]: 17/145 cut-off events. [2023-08-23 23:53:10,064 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 23:53:10,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 145 events. 17/145 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 311 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-08-23 23:53:10,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 110 transitions, 228 flow [2023-08-23 23:53:10,076 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 105 transitions, 215 flow [2023-08-23 23:53:10,080 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:53:10,087 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 105 transitions, 215 flow [2023-08-23 23:53:10,089 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 105 transitions, 215 flow [2023-08-23 23:53:10,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 105 transitions, 215 flow [2023-08-23 23:53:10,111 INFO L124 PetriNetUnfolderBase]: 16/140 cut-off events. [2023-08-23 23:53:10,111 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:53:10,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 16/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 305 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-08-23 23:53:10,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 2296 [2023-08-23 23:53:12,691 INFO L134 LiptonReduction]: Checked pairs total: 4241 [2023-08-23 23:53:12,691 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-23 23:53:12,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:53:12,717 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;@7533326f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:53:12,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:53:12,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:53:12,728 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-23 23:53:12,729 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:53:12,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:12,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:53:12,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:12,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:12,735 INFO L85 PathProgramCache]: Analyzing trace with hash 12882215, now seen corresponding path program 1 times [2023-08-23 23:53:12,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:12,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77079599] [2023-08-23 23:53:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:12,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:12,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:53:12,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77079599] [2023-08-23 23:53:12,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77079599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:53:12,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:53:12,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:53:12,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085955794] [2023-08-23 23:53:12,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:53:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:53:12,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:53:12,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:53:12,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:53:12,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 197 [2023-08-23 23:53:12,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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) [2023-08-23 23:53:12,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:53:12,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 197 [2023-08-23 23:53:12,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:53:13,088 INFO L124 PetriNetUnfolderBase]: 80/191 cut-off events. [2023-08-23 23:53:13,088 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:53:13,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 191 events. 80/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 790 event pairs, 0 based on Foata normal form. 20/184 useless extension candidates. Maximal degree in co-relation 357. Up to 171 conditions per place. [2023-08-23 23:53:13,091 INFO L140 encePairwiseOnDemand]: 184/197 looper letters, 22 selfloop transitions, 2 changer transitions 5/31 dead transitions. [2023-08-23 23:53:13,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 125 flow [2023-08-23 23:53:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:53:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:53:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-23 23:53:13,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245346869712352 [2023-08-23 23:53:13,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-23 23:53:13,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-23 23:53:13,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:53:13,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-23 23:53:13,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2023-08-23 23:53:13,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2023-08-23 23:53:13,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2023-08-23 23:53:13,118 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 310 transitions. [2023-08-23 23:53:13,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 125 flow [2023-08-23 23:53:13,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:53:13,121 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 47 flow [2023-08-23 23:53:13,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2023-08-23 23:53:13,126 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-08-23 23:53:13,126 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 47 flow [2023-08-23 23:53:13,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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) [2023-08-23 23:53:13,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:13,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-23 23:53:13,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 23:53:13,127 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:13,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:13,128 INFO L85 PathProgramCache]: Analyzing trace with hash -514232300, now seen corresponding path program 1 times [2023-08-23 23:53:13,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:13,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959143985] [2023-08-23 23:53:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:13,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:53:13,169 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:53:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:53:13,222 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:53:13,222 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:53:13,224 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:53:13,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:53:13,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 23:53:13,226 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 23:53:13,228 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:53:13,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 23:53:13,256 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-23 23:53:13,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 140 transitions, 298 flow [2023-08-23 23:53:13,295 INFO L124 PetriNetUnfolderBase]: 31/235 cut-off events. [2023-08-23 23:53:13,295 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-23 23:53:13,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 235 events. 31/235 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 631 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-08-23 23:53:13,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 140 transitions, 298 flow [2023-08-23 23:53:13,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 140 transitions, 298 flow [2023-08-23 23:53:13,302 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:53:13,302 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 140 transitions, 298 flow [2023-08-23 23:53:13,302 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 140 transitions, 298 flow [2023-08-23 23:53:13,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 140 transitions, 298 flow [2023-08-23 23:53:13,328 INFO L124 PetriNetUnfolderBase]: 31/235 cut-off events. [2023-08-23 23:53:13,328 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-23 23:53:13,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 235 events. 31/235 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 631 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-08-23 23:53:13,335 INFO L119 LiptonReduction]: Number of co-enabled transitions 6776 [2023-08-23 23:53:15,931 INFO L134 LiptonReduction]: Checked pairs total: 15680 [2023-08-23 23:53:15,931 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-23 23:53:15,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:53:15,934 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;@7533326f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:53:15,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:53:15,937 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:53:15,937 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-23 23:53:15,937 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:53:15,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:15,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:53:15,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:15,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash 21163698, now seen corresponding path program 1 times [2023-08-23 23:53:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:15,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622753646] [2023-08-23 23:53:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:15,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:15,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:53:15,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622753646] [2023-08-23 23:53:15,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622753646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:53:15,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:53:15,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:53:15,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938938800] [2023-08-23 23:53:15,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:53:15,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:53:15,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:53:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:53:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:53:15,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 239 [2023-08-23 23:53:15,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2023-08-23 23:53:15,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:53:15,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 239 [2023-08-23 23:53:15,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:53:16,211 INFO L124 PetriNetUnfolderBase]: 1376/2498 cut-off events. [2023-08-23 23:53:16,211 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-23 23:53:16,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4822 conditions, 2498 events. 1376/2498 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 15200 event pairs, 648 based on Foata normal form. 569/2763 useless extension candidates. Maximal degree in co-relation 645. Up to 2257 conditions per place. [2023-08-23 23:53:16,220 INFO L140 encePairwiseOnDemand]: 221/239 looper letters, 28 selfloop transitions, 2 changer transitions 10/50 dead transitions. [2023-08-23 23:53:16,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 196 flow [2023-08-23 23:53:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:53:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:53:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 391 transitions. [2023-08-23 23:53:16,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5453277545327755 [2023-08-23 23:53:16,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 391 transitions. [2023-08-23 23:53:16,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 391 transitions. [2023-08-23 23:53:16,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:53:16,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 391 transitions. [2023-08-23 23:53:16,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 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) [2023-08-23 23:53:16,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 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) [2023-08-23 23:53:16,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 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) [2023-08-23 23:53:16,228 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 391 transitions. [2023-08-23 23:53:16,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 196 flow [2023-08-23 23:53:16,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:53:16,230 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 88 flow [2023-08-23 23:53:16,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-08-23 23:53:16,231 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-23 23:53:16,231 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 88 flow [2023-08-23 23:53:16,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2023-08-23 23:53:16,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:16,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:53:16,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 23:53:16,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:16,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:16,233 INFO L85 PathProgramCache]: Analyzing trace with hash 832707092, now seen corresponding path program 1 times [2023-08-23 23:53:16,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:16,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153048164] [2023-08-23 23:53:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:16,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:53:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153048164] [2023-08-23 23:53:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153048164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:53:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052164547] [2023-08-23 23:53:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:16,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:53:16,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:53:16,312 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) [2023-08-23 23:53:16,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-23 23:53:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:16,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-23 23:53:16,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:53:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:16,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:53:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:16,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052164547] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:53:16,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:53:16,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-23 23:53:16,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841129405] [2023-08-23 23:53:16,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:53:16,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:53:16,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:53:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:53:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:53:16,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 239 [2023-08-23 23:53:16,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 112.28571428571429) internal successors, (786), 7 states have internal predecessors, (786), 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) [2023-08-23 23:53:16,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:53:16,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 239 [2023-08-23 23:53:16,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:53:16,598 INFO L124 PetriNetUnfolderBase]: 286/595 cut-off events. [2023-08-23 23:53:16,599 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-08-23 23:53:16,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 595 events. 286/595 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3036 event pairs, 0 based on Foata normal form. 70/665 useless extension candidates. Maximal degree in co-relation 191. Up to 346 conditions per place. [2023-08-23 23:53:16,602 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-23 23:53:16,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 208 flow [2023-08-23 23:53:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 23:53:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 23:53:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 594 transitions. [2023-08-23 23:53:16,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.497071129707113 [2023-08-23 23:53:16,605 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 594 transitions. [2023-08-23 23:53:16,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 594 transitions. [2023-08-23 23:53:16,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:53:16,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 594 transitions. [2023-08-23 23:53:16,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 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) [2023-08-23 23:53:16,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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) [2023-08-23 23:53:16,611 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 239.0) internal successors, (1434), 6 states have internal predecessors, (1434), 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) [2023-08-23 23:53:16,611 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 88 flow. Second operand 5 states and 594 transitions. [2023-08-23 23:53:16,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 208 flow [2023-08-23 23:53:16,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-23 23:53:16,615 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-23 23:53:16,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, 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} [2023-08-23 23:53:16,617 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-08-23 23:53:16,618 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-23 23:53:16,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 112.28571428571429) internal successors, (786), 7 states have internal predecessors, (786), 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) [2023-08-23 23:53:16,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:16,618 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-23 23:53:16,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-23 23:53:16,824 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 [2023-08-23 23:53:16,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:16,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash -900799872, now seen corresponding path program 1 times [2023-08-23 23:53:16,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:16,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291210037] [2023-08-23 23:53:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:53:16,856 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:53:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:53:16,879 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:53:16,879 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:53:16,880 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:53:16,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:53:16,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 23:53:16,881 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 23:53:16,884 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:53:16,885 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 23:53:16,904 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-23 23:53:16,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 170 transitions, 370 flow [2023-08-23 23:53:16,938 INFO L124 PetriNetUnfolderBase]: 50/358 cut-off events. [2023-08-23 23:53:16,938 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-23 23:53:16,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 358 events. 50/358 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1107 event pairs, 1 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-23 23:53:16,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 170 transitions, 370 flow [2023-08-23 23:53:16,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 170 transitions, 370 flow [2023-08-23 23:53:16,943 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:53:16,943 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 170 transitions, 370 flow [2023-08-23 23:53:16,943 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 170 transitions, 370 flow [2023-08-23 23:53:16,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 170 transitions, 370 flow [2023-08-23 23:53:16,974 INFO L124 PetriNetUnfolderBase]: 50/358 cut-off events. [2023-08-23 23:53:16,974 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-23 23:53:16,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 358 events. 50/358 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1107 event pairs, 1 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-23 23:53:16,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2023-08-23 23:53:19,567 INFO L134 LiptonReduction]: Checked pairs total: 37083 [2023-08-23 23:53:19,567 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-23 23:53:19,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:53:19,569 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;@7533326f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:53:19,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:53:19,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:53:19,571 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-23 23:53:19,571 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:53:19,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:19,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:53:19,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:19,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash 30830590, now seen corresponding path program 1 times [2023-08-23 23:53:19,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:19,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981550696] [2023-08-23 23:53:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:19,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:19,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:53:19,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981550696] [2023-08-23 23:53:19,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981550696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:53:19,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:53:19,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:53:19,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362983839] [2023-08-23 23:53:19,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:53:19,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:53:19,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:53:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:53:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:53:19,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 284 [2023-08-23 23:53:19,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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) [2023-08-23 23:53:19,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:53:19,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 284 [2023-08-23 23:53:19,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:53:22,813 INFO L124 PetriNetUnfolderBase]: 25911/38674 cut-off events. [2023-08-23 23:53:22,813 INFO L125 PetriNetUnfolderBase]: For 1017/1017 co-relation queries the response was YES. [2023-08-23 23:53:22,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75932 conditions, 38674 events. 25911/38674 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 265128 event pairs, 24657 based on Foata normal form. 8575/43461 useless extension candidates. Maximal degree in co-relation 29456. Up to 36545 conditions per place. [2023-08-23 23:53:22,969 INFO L140 encePairwiseOnDemand]: 260/284 looper letters, 41 selfloop transitions, 2 changer transitions 11/65 dead transitions. [2023-08-23 23:53:22,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 266 flow [2023-08-23 23:53:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:53:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:53:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-23 23:53:22,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598591549295775 [2023-08-23 23:53:22,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-23 23:53:22,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-23 23:53:22,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:53:22,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-23 23:53:22,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 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) [2023-08-23 23:53:22,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 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) [2023-08-23 23:53:22,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 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) [2023-08-23 23:53:22,977 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 182 flow. Second operand 3 states and 477 transitions. [2023-08-23 23:53:22,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 266 flow [2023-08-23 23:53:22,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:53:22,982 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 121 flow [2023-08-23 23:53:22,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2023-08-23 23:53:22,986 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-23 23:53:22,986 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 121 flow [2023-08-23 23:53:22,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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) [2023-08-23 23:53:22,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:22,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:53:22,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 23:53:22,987 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:22,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1118948408, now seen corresponding path program 1 times [2023-08-23 23:53:22,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:22,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41830107] [2023-08-23 23:53:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:22,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:23,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:53:23,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41830107] [2023-08-23 23:53:23,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41830107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:53:23,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37204806] [2023-08-23 23:53:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:23,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:53:23,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:53:23,065 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) [2023-08-23 23:53:23,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-23 23:53:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:23,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-23 23:53:23,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:53:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:23,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:53:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:23,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37204806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:53:23,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:53:23,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-23 23:53:23,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414932782] [2023-08-23 23:53:23,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:53:23,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 23:53:23,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:53:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 23:53:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-23 23:53:23,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 284 [2023-08-23 23:53:23,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 134.0) internal successors, (804), 6 states have internal predecessors, (804), 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) [2023-08-23 23:53:23,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:53:23,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 284 [2023-08-23 23:53:23,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:53:23,921 INFO L124 PetriNetUnfolderBase]: 5560/9112 cut-off events. [2023-08-23 23:53:23,922 INFO L125 PetriNetUnfolderBase]: For 3258/3258 co-relation queries the response was YES. [2023-08-23 23:53:23,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20507 conditions, 9112 events. 5560/9112 cut-off events. For 3258/3258 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 60702 event pairs, 0 based on Foata normal form. 819/9930 useless extension candidates. Maximal degree in co-relation 2333. Up to 5346 conditions per place. [2023-08-23 23:53:23,965 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 79 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-08-23 23:53:23,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 385 flow [2023-08-23 23:53:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 23:53:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 23:53:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 878 transitions. [2023-08-23 23:53:23,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152582159624414 [2023-08-23 23:53:23,968 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 878 transitions. [2023-08-23 23:53:23,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 878 transitions. [2023-08-23 23:53:23,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:53:23,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 878 transitions. [2023-08-23 23:53:23,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.33333333333334) internal successors, (878), 6 states have internal predecessors, (878), 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) [2023-08-23 23:53:23,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 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) [2023-08-23 23:53:23,976 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 284.0) internal successors, (1988), 7 states have internal predecessors, (1988), 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) [2023-08-23 23:53:23,976 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 121 flow. Second operand 6 states and 878 transitions. [2023-08-23 23:53:23,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 385 flow [2023-08-23 23:53:23,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 377 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-23 23:53:23,986 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-23 23:53:23,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, 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} [2023-08-23 23:53:23,987 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-08-23 23:53:23,989 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-23 23:53:23,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.0) internal successors, (804), 6 states have internal predecessors, (804), 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) [2023-08-23 23:53:23,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:23,990 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 23:53:23,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-23 23:53:24,194 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 [2023-08-23 23:53:24,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:24,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1813567792, now seen corresponding path program 1 times [2023-08-23 23:53:24,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:24,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116137149] [2023-08-23 23:53:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:24,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:53:24,218 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:53:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:53:24,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:53:24,241 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:53:24,241 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:53:24,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:53:24,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 23:53:24,241 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 23:53:24,242 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:53:24,242 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 23:53:24,286 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-23 23:53:24,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 200 transitions, 444 flow [2023-08-23 23:53:24,345 INFO L124 PetriNetUnfolderBase]: 81/549 cut-off events. [2023-08-23 23:53:24,345 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-23 23:53:24,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 549 events. 81/549 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1993 event pairs, 6 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 378. Up to 32 conditions per place. [2023-08-23 23:53:24,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 200 transitions, 444 flow [2023-08-23 23:53:24,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 200 transitions, 444 flow [2023-08-23 23:53:24,352 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:53:24,352 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 200 transitions, 444 flow [2023-08-23 23:53:24,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 200 transitions, 444 flow [2023-08-23 23:53:24,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 200 transitions, 444 flow [2023-08-23 23:53:24,403 INFO L124 PetriNetUnfolderBase]: 81/549 cut-off events. [2023-08-23 23:53:24,403 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-23 23:53:24,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 549 events. 81/549 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1993 event pairs, 6 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 378. Up to 32 conditions per place. [2023-08-23 23:53:24,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 20496 [2023-08-23 23:53:27,205 INFO L134 LiptonReduction]: Checked pairs total: 62569 [2023-08-23 23:53:27,205 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-23 23:53:27,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:53:27,207 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;@7533326f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:53:27,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:53:27,209 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:53:27,209 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2023-08-23 23:53:27,209 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:53:27,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:27,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:53:27,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:27,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:27,209 INFO L85 PathProgramCache]: Analyzing trace with hash 41881764, now seen corresponding path program 1 times [2023-08-23 23:53:27,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:27,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408261294] [2023-08-23 23:53:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:27,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:27,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:53:27,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408261294] [2023-08-23 23:53:27,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408261294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:53:27,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:53:27,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:53:27,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702823007] [2023-08-23 23:53:27,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:53:27,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:53:27,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:53:27,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:53:27,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:53:27,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 329 [2023-08-23 23:53:27,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 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) [2023-08-23 23:53:27,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:53:27,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 329 [2023-08-23 23:53:27,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:53:47,945 INFO L124 PetriNetUnfolderBase]: 230525/320654 cut-off events. [2023-08-23 23:53:47,945 INFO L125 PetriNetUnfolderBase]: For 11952/11952 co-relation queries the response was YES. [2023-08-23 23:53:48,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629140 conditions, 320654 events. 230525/320654 cut-off events. For 11952/11952 co-relation queries the response was YES. Maximal size of possible extension queue 7306. Compared 2505037 event pairs, 187184 based on Foata normal form. 59840/354865 useless extension candidates. Maximal degree in co-relation 60875. Up to 301798 conditions per place. [2023-08-23 23:53:49,176 INFO L140 encePairwiseOnDemand]: 299/329 looper letters, 46 selfloop transitions, 2 changer transitions 12/77 dead transitions. [2023-08-23 23:53:49,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 316 flow [2023-08-23 23:53:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:53:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:53:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2023-08-23 23:53:49,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5623100303951368 [2023-08-23 23:53:49,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2023-08-23 23:53:49,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2023-08-23 23:53:49,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:53:49,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2023-08-23 23:53:49,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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) [2023-08-23 23:53:49,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-08-23 23:53:49,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-08-23 23:53:49,182 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 555 transitions. [2023-08-23 23:53:49,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 316 flow [2023-08-23 23:53:49,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:53:49,188 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 156 flow [2023-08-23 23:53:49,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-08-23 23:53:49,191 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-23 23:53:49,191 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 156 flow [2023-08-23 23:53:49,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 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) [2023-08-23 23:53:49,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:49,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:53:49,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-23 23:53:49,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:49,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:49,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1406063779, now seen corresponding path program 1 times [2023-08-23 23:53:49,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:49,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77649470] [2023-08-23 23:53:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:49,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:49,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:53:49,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77649470] [2023-08-23 23:53:49,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77649470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:53:49,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785355906] [2023-08-23 23:53:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:49,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:53:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:53:49,235 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) [2023-08-23 23:53:49,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-23 23:53:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:53:49,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-23 23:53:49,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:53:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:49,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:53:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:53:49,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785355906] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:53:49,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:53:49,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-23 23:53:49,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194063756] [2023-08-23 23:53:49,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:53:49,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:53:49,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:53:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:53:49,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:53:49,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 329 [2023-08-23 23:53:49,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 156.28571428571428) internal successors, (1094), 7 states have internal predecessors, (1094), 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) [2023-08-23 23:53:49,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:53:49,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 329 [2023-08-23 23:53:49,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:53:57,227 INFO L124 PetriNetUnfolderBase]: 96934/132781 cut-off events. [2023-08-23 23:53:57,228 INFO L125 PetriNetUnfolderBase]: For 17808/17808 co-relation queries the response was YES. [2023-08-23 23:53:57,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275360 conditions, 132781 events. 96934/132781 cut-off events. For 17808/17808 co-relation queries the response was YES. Maximal size of possible extension queue 3510. Compared 939123 event pairs, 13696 based on Foata normal form. 584/133237 useless extension candidates. Maximal degree in co-relation 35332. Up to 83201 conditions per place. [2023-08-23 23:53:57,903 INFO L140 encePairwiseOnDemand]: 325/329 looper letters, 111 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-08-23 23:53:57,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 134 transitions, 548 flow [2023-08-23 23:53:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 23:53:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 23:53:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1044 transitions. [2023-08-23 23:53:57,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2023-08-23 23:53:57,906 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1044 transitions. [2023-08-23 23:53:57,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1044 transitions. [2023-08-23 23:53:57,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:53:57,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1044 transitions. [2023-08-23 23:53:57,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 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) [2023-08-23 23:53:57,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-08-23 23:53:57,912 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-08-23 23:53:57,912 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 156 flow. Second operand 6 states and 1044 transitions. [2023-08-23 23:53:57,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 134 transitions, 548 flow [2023-08-23 23:53:57,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 134 transitions, 534 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-23 23:53:57,938 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-23 23:53:57,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, 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} [2023-08-23 23:53:57,939 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-23 23:53:57,939 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-23 23:53:57,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.28571428571428) internal successors, (1094), 7 states have internal predecessors, (1094), 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) [2023-08-23 23:53:57,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:53:57,940 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-23 23:53:57,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-23 23:53:58,144 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 [2023-08-23 23:53:58,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:53:58,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:53:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1190327278, now seen corresponding path program 1 times [2023-08-23 23:53:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:53:58,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925048429] [2023-08-23 23:53:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:53:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:53:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:53:58,159 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:53:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:53:58,184 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:53:58,184 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:53:58,185 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:53:58,185 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:53:58,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-23 23:53:58,185 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 23:53:58,186 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:53:58,186 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-23 23:53:58,222 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-23 23:53:58,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 230 transitions, 520 flow [2023-08-23 23:53:58,305 INFO L124 PetriNetUnfolderBase]: 140/880 cut-off events. [2023-08-23 23:53:58,305 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-23 23:53:58,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 880 events. 140/880 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3874 event pairs, 23 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 594. Up to 80 conditions per place. [2023-08-23 23:53:58,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 230 transitions, 520 flow [2023-08-23 23:53:58,314 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 230 transitions, 520 flow [2023-08-23 23:53:58,315 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:53:58,315 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 230 transitions, 520 flow [2023-08-23 23:53:58,315 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 230 transitions, 520 flow [2023-08-23 23:53:58,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 230 transitions, 520 flow [2023-08-23 23:53:58,388 INFO L124 PetriNetUnfolderBase]: 140/880 cut-off events. [2023-08-23 23:53:58,389 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-23 23:53:58,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 880 events. 140/880 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3874 event pairs, 23 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 594. Up to 80 conditions per place. [2023-08-23 23:53:58,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 29960 [2023-08-23 23:54:01,292 INFO L134 LiptonReduction]: Checked pairs total: 94347 [2023-08-23 23:54:01,292 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-23 23:54:01,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:54:01,294 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;@7533326f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:54:01,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:54:01,295 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:54:01,296 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-08-23 23:54:01,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:54:01,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:54:01,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:54:01,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:54:01,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:54:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash 54406475, now seen corresponding path program 1 times [2023-08-23 23:54:01,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:54:01,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750671984] [2023-08-23 23:54:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:54:01,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:54:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:54:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:54:01,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:54:01,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750671984] [2023-08-23 23:54:01,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750671984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:54:01,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:54:01,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:54:01,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707523066] [2023-08-23 23:54:01,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:54:01,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:54:01,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:54:01,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:54:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:54:01,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 377 [2023-08-23 23:54:01,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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) [2023-08-23 23:54:01,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:54:01,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 377 [2023-08-23 23:54:01,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand