/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_21-deref_read_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 23:59:13,652 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 23:59:13,732 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 23:59:13,735 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 23:59:13,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 23:59:13,761 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 23:59:13,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 23:59:13,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 23:59:13,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 23:59:13,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 23:59:13,763 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 23:59:13,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 23:59:13,764 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 23:59:13,764 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 23:59:13,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 23:59:13,765 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 23:59:13,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 23:59:13,765 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 23:59:13,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 23:59:13,766 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 23:59:13,766 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 23:59:13,767 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 23:59:13,767 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 23:59:13,768 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 23:59:13,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 23:59:13,768 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 23:59:13,769 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 23:59:13,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:59:13,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 23:59:13,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 23:59:13,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 23:59:13,771 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 23:59:13,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 23:59:13,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 23:59:13,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 23:59:13,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 23:59:14,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 23:59:14,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 23:59:14,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 23:59:14,087 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 23:59:14,088 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 23:59:14,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-08-23 23:59:15,288 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 23:59:15,520 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 23:59:15,521 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-08-23 23:59:15,533 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f5448373/7986d27c76d641749d859fa277d1f3cb/FLAG88a6ed930 [2023-08-23 23:59:15,547 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f5448373/7986d27c76d641749d859fa277d1f3cb [2023-08-23 23:59:15,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 23:59:15,554 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 23:59:15,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 23:59:15,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 23:59:15,559 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 23:59:15,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:15,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159f2311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15, skipping insertion in model container [2023-08-23 23:59:15,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:15,602 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 23:59:15,816 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_21-deref_read_racing.i[30176,30189] [2023-08-23 23:59:15,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:59:15,849 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 23:59:15,880 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-23 23:59:15,882 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-23 23:59:15,908 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_21-deref_read_racing.i[30176,30189] [2023-08-23 23:59:15,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:59:15,955 INFO L206 MainTranslator]: Completed translation [2023-08-23 23:59:15,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15 WrapperNode [2023-08-23 23:59:15,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 23:59:15,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 23:59:15,957 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 23:59:15,957 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 23:59:15,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:15,988 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,012 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-08-23 23:59:16,012 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 23:59:16,013 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 23:59:16,014 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 23:59:16,014 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 23:59:16,021 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,028 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,028 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,033 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,040 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,048 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 23:59:16,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 23:59:16,049 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 23:59:16,049 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 23:59:16,049 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (1/1) ... [2023-08-23 23:59:16,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:59:16,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:59:16,082 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 23:59:16,109 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 23:59:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 23:59:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 23:59:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-23 23:59:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 23:59:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 23:59:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-23 23:59:16,124 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-23 23:59:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 23:59:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 23:59:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 23:59:16,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 23:59:16,126 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 23:59:16,272 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 23:59:16,275 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 23:59:16,477 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 23:59:16,483 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 23:59:16,483 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-23 23:59:16,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:59:16 BoogieIcfgContainer [2023-08-23 23:59:16,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 23:59:16,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 23:59:16,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 23:59:16,490 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 23:59:16,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 11:59:15" (1/3) ... [2023-08-23 23:59:16,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba40a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:59:16, skipping insertion in model container [2023-08-23 23:59:16,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:59:15" (2/3) ... [2023-08-23 23:59:16,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba40a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:59:16, skipping insertion in model container [2023-08-23 23:59:16,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:59:16" (3/3) ... [2023-08-23 23:59:16,500 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-08-23 23:59:16,515 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 23:59:16,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 23:59:16,516 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 23:59:16,586 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 23:59:16,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 98 transitions, 201 flow [2023-08-23 23:59:16,687 INFO L124 PetriNetUnfolderBase]: 14/127 cut-off events. [2023-08-23 23:59:16,688 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:59:16,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 127 events. 14/127 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 274 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2023-08-23 23:59:16,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 98 transitions, 201 flow [2023-08-23 23:59:16,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 98 transitions, 201 flow [2023-08-23 23:59:16,700 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:59:16,708 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 98 transitions, 201 flow [2023-08-23 23:59:16,710 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 98 transitions, 201 flow [2023-08-23 23:59:16,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 98 transitions, 201 flow [2023-08-23 23:59:16,746 INFO L124 PetriNetUnfolderBase]: 14/127 cut-off events. [2023-08-23 23:59:16,746 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:59:16,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 127 events. 14/127 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 274 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2023-08-23 23:59:16,749 INFO L119 LiptonReduction]: Number of co-enabled transitions 2240 [2023-08-23 23:59:19,227 INFO L134 LiptonReduction]: Checked pairs total: 3958 [2023-08-23 23:59:19,227 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-23 23:59:19,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:59:19,245 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;@434b372c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:59:19,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:59:19,248 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:59:19,248 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-23 23:59:19,248 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:59:19,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:19,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:59:19,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:19,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash 11831655, now seen corresponding path program 1 times [2023-08-23 23:59:19,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:19,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150526994] [2023-08-23 23:59:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:19,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:19,454 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 23:59:19,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:59:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150526994] [2023-08-23 23:59:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150526994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:59:19,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:59:19,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:59:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599569085] [2023-08-23 23:59:19,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:59:19,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:59:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:59:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:59:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:59:19,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 181 [2023-08-23 23:59:19,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 29 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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 23:59:19,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:59:19,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 181 [2023-08-23 23:59:19,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:59:19,588 INFO L124 PetriNetUnfolderBase]: 63/157 cut-off events. [2023-08-23 23:59:19,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:59:19,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 157 events. 63/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 16/153 useless extension candidates. Maximal degree in co-relation 286. Up to 134 conditions per place. [2023-08-23 23:59:19,592 INFO L140 encePairwiseOnDemand]: 170/181 looper letters, 24 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2023-08-23 23:59:19,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 123 flow [2023-08-23 23:59:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:59:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:59:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-23 23:59:19,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101289134438306 [2023-08-23 23:59:19,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-23 23:59:19,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-23 23:59:19,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:59:19,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-23 23:59:19,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:59:19,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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 23:59:19,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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 23:59:19,629 INFO L175 Difference]: Start difference. First operand has 24 places, 29 transitions, 63 flow. Second operand 3 states and 277 transitions. [2023-08-23 23:59:19,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 123 flow [2023-08-23 23:59:19,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 23:59:19,634 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 51 flow [2023-08-23 23:59:19,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-08-23 23:59:19,638 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-08-23 23:59:19,638 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 51 flow [2023-08-23 23:59:19,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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 23:59:19,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:19,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-23 23:59:19,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 23:59:19,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:19,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1526387630, now seen corresponding path program 1 times [2023-08-23 23:59:19,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:19,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559142533] [2023-08-23 23:59:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:19,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:59:19,691 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:59:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:59:19,743 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:59:19,744 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:59:19,745 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:59:19,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:59:19,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 23:59:19,747 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 23:59:19,750 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:59:19,750 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 23:59:19,770 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 23:59:19,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 131 transitions, 274 flow [2023-08-23 23:59:19,802 INFO L124 PetriNetUnfolderBase]: 24/194 cut-off events. [2023-08-23 23:59:19,802 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 23:59:19,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 194 events. 24/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 514 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2023-08-23 23:59:19,807 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 131 transitions, 274 flow [2023-08-23 23:59:19,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 131 transitions, 274 flow [2023-08-23 23:59:19,809 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:59:19,809 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 131 transitions, 274 flow [2023-08-23 23:59:19,810 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 131 transitions, 274 flow [2023-08-23 23:59:19,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 131 transitions, 274 flow [2023-08-23 23:59:19,828 INFO L124 PetriNetUnfolderBase]: 24/194 cut-off events. [2023-08-23 23:59:19,828 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 23:59:19,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 194 events. 24/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 514 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2023-08-23 23:59:19,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 6592 [2023-08-23 23:59:22,473 INFO L134 LiptonReduction]: Checked pairs total: 13295 [2023-08-23 23:59:22,473 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-23 23:59:22,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:59:22,476 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;@434b372c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:59:22,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:59:22,478 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:59:22,478 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-23 23:59:22,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:59:22,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:22,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:59:22,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:22,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash 20023237, now seen corresponding path program 1 times [2023-08-23 23:59:22,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:22,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991843089] [2023-08-23 23:59:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:22,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:22,520 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 23:59:22,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:59:22,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991843089] [2023-08-23 23:59:22,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991843089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:59:22,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:59:22,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:59:22,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656608090] [2023-08-23 23:59:22,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:59:22,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:59:22,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:59:22,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:59:22,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:59:22,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 233 [2023-08-23 23:59:22,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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 23:59:22,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:59:22,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 233 [2023-08-23 23:59:22,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:59:22,715 INFO L124 PetriNetUnfolderBase]: 1271/2180 cut-off events. [2023-08-23 23:59:22,715 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-23 23:59:22,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4295 conditions, 2180 events. 1271/2180 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 11449 event pairs, 1184 based on Foata normal form. 320/2279 useless extension candidates. Maximal degree in co-relation 3095. Up to 2062 conditions per place. [2023-08-23 23:59:22,726 INFO L140 encePairwiseOnDemand]: 216/233 looper letters, 34 selfloop transitions, 2 changer transitions 2/45 dead transitions. [2023-08-23 23:59:22,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 178 flow [2023-08-23 23:59:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:59:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:59:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-23 23:59:22,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530758226037196 [2023-08-23 23:59:22,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-23 23:59:22,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-23 23:59:22,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:59:22,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-23 23:59:22,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 23:59:22,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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 23:59:22,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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 23:59:22,732 INFO L175 Difference]: Start difference. First operand has 39 places, 48 transitions, 108 flow. Second operand 3 states and 371 transitions. [2023-08-23 23:59:22,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 178 flow [2023-08-23 23:59:22,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 176 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-23 23:59:22,734 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 86 flow [2023-08-23 23:59:22,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-23 23:59:22,734 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-23 23:59:22,735 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 86 flow [2023-08-23 23:59:22,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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 23:59:22,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:22,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:59:22,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 23:59:22,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:22,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash -46664117, now seen corresponding path program 1 times [2023-08-23 23:59:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744016490] [2023-08-23 23:59:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:22,787 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 23:59:22,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:59:22,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744016490] [2023-08-23 23:59:22,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744016490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:59:22,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924015977] [2023-08-23 23:59:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:22,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:59:22,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:59:22,793 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 23:59:22,835 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 23:59:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:22,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-23 23:59:22,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:59:22,952 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 23:59:22,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:59:22,999 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 23:59:22,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924015977] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:59:23,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:59:23,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-23 23:59:23,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552146439] [2023-08-23 23:59:23,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:59:23,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:59:23,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:59:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:59:23,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:59:23,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 233 [2023-08-23 23:59:23,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 106.28571428571429) internal successors, (744), 7 states have internal predecessors, (744), 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 23:59:23,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:59:23,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 233 [2023-08-23 23:59:23,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:59:23,140 INFO L124 PetriNetUnfolderBase]: 421/856 cut-off events. [2023-08-23 23:59:23,141 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-23 23:59:23,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 856 events. 421/856 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4458 event pairs, 0 based on Foata normal form. 100/956 useless extension candidates. Maximal degree in co-relation 182. Up to 502 conditions per place. [2023-08-23 23:59:23,146 INFO L140 encePairwiseOnDemand]: 230/233 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-23 23:59:23,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 236 flow [2023-08-23 23:59:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 23:59:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 23:59:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-23 23:59:23,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4918454935622318 [2023-08-23 23:59:23,148 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-23 23:59:23,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-23 23:59:23,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:59:23,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-23 23:59:23,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 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 23:59:23,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 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 23:59:23,154 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 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 23:59:23,154 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 86 flow. Second operand 5 states and 573 transitions. [2023-08-23 23:59:23,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 236 flow [2023-08-23 23:59:23,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 23:59:23,157 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-23 23:59:23,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, 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 23:59:23,159 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-23 23:59:23,160 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-23 23:59:23,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.28571428571429) internal successors, (744), 7 states have internal predecessors, (744), 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 23:59:23,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:23,160 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-23 23:59:23,168 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 23:59:23,365 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 23:59:23,365 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:23,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:23,366 INFO L85 PathProgramCache]: Analyzing trace with hash 777933917, now seen corresponding path program 1 times [2023-08-23 23:59:23,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:23,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134878341] [2023-08-23 23:59:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:23,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:59:23,386 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:59:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:59:23,410 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:59:23,411 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:59:23,411 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:59:23,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:59:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 23:59:23,411 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 23:59:23,412 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:59:23,412 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 23:59:23,438 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 23:59:23,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 164 transitions, 349 flow [2023-08-23 23:59:23,477 INFO L124 PetriNetUnfolderBase]: 34/261 cut-off events. [2023-08-23 23:59:23,477 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 23:59:23,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 261 events. 34/261 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 759 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 198. Up to 8 conditions per place. [2023-08-23 23:59:23,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 164 transitions, 349 flow [2023-08-23 23:59:23,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 164 transitions, 349 flow [2023-08-23 23:59:23,487 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:59:23,487 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 164 transitions, 349 flow [2023-08-23 23:59:23,487 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 164 transitions, 349 flow [2023-08-23 23:59:23,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 164 transitions, 349 flow [2023-08-23 23:59:23,511 INFO L124 PetriNetUnfolderBase]: 34/261 cut-off events. [2023-08-23 23:59:23,512 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 23:59:23,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 261 events. 34/261 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 759 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 198. Up to 8 conditions per place. [2023-08-23 23:59:23,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 13056 [2023-08-23 23:59:26,111 INFO L134 LiptonReduction]: Checked pairs total: 27717 [2023-08-23 23:59:26,111 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-23 23:59:26,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:59:26,113 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;@434b372c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:59:26,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:59:26,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:59:26,115 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-23 23:59:26,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:59:26,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:26,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:59:26,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:26,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash 29809200, now seen corresponding path program 1 times [2023-08-23 23:59:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:26,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67106008] [2023-08-23 23:59:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:26,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:26,161 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 23:59:26,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:59:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67106008] [2023-08-23 23:59:26,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67106008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:59:26,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:59:26,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:59:26,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258849222] [2023-08-23 23:59:26,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:59:26,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:59:26,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:59:26,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:59:26,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:59:26,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 285 [2023-08-23 23:59:26,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 23:59:26,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:59:26,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 285 [2023-08-23 23:59:26,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:59:28,311 INFO L124 PetriNetUnfolderBase]: 17895/26811 cut-off events. [2023-08-23 23:59:28,312 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2023-08-23 23:59:28,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52455 conditions, 26811 events. 17895/26811 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 178031 event pairs, 11439 based on Foata normal form. 4496/29263 useless extension candidates. Maximal degree in co-relation 4391. Up to 25159 conditions per place. [2023-08-23 23:59:28,448 INFO L140 encePairwiseOnDemand]: 262/285 looper letters, 42 selfloop transitions, 2 changer transitions 2/56 dead transitions. [2023-08-23 23:59:28,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 225 flow [2023-08-23 23:59:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:59:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:59:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-23 23:59:28,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5415204678362573 [2023-08-23 23:59:28,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-23 23:59:28,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-23 23:59:28,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:59:28,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-23 23:59:28,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 23:59:28,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 23:59:28,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 23:59:28,454 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 153 flow. Second operand 3 states and 463 transitions. [2023-08-23 23:59:28,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 225 flow [2023-08-23 23:59:28,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 219 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-23 23:59:28,458 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 115 flow [2023-08-23 23:59:28,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-08-23 23:59:28,461 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-23 23:59:28,461 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 115 flow [2023-08-23 23:59:28,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 23:59:28,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:28,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:59:28,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 23:59:28,463 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:28,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash 101649787, now seen corresponding path program 1 times [2023-08-23 23:59:28,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:28,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125476225] [2023-08-23 23:59:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:28,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:28,527 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 23:59:28,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:59:28,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125476225] [2023-08-23 23:59:28,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125476225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 23:59:28,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768363853] [2023-08-23 23:59:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:28,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 23:59:28,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:59:28,529 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 23:59:28,532 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 23:59:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:28,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-23 23:59:28,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 23:59:28,609 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 23:59:28,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 23:59:28,629 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 23:59:28,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768363853] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 23:59:28,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 23:59:28,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-23 23:59:28,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708900505] [2023-08-23 23:59:28,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 23:59:28,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-23 23:59:28,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:59:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-23 23:59:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-23 23:59:28,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 285 [2023-08-23 23:59:28,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 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 23:59:28,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:59:28,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 285 [2023-08-23 23:59:28,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:59:29,478 INFO L124 PetriNetUnfolderBase]: 6205/10127 cut-off events. [2023-08-23 23:59:29,478 INFO L125 PetriNetUnfolderBase]: For 1027/1027 co-relation queries the response was YES. [2023-08-23 23:59:29,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21096 conditions, 10127 events. 6205/10127 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 67796 event pairs, 77 based on Foata normal form. 909/11035 useless extension candidates. Maximal degree in co-relation 18622. Up to 5958 conditions per place. [2023-08-23 23:59:29,527 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-08-23 23:59:29,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 389 flow [2023-08-23 23:59:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 23:59:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 23:59:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 869 transitions. [2023-08-23 23:59:29,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508187134502924 [2023-08-23 23:59:29,530 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 869 transitions. [2023-08-23 23:59:29,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 869 transitions. [2023-08-23 23:59:29,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:59:29,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 869 transitions. [2023-08-23 23:59:29,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 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 23:59:29,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 285.0) internal successors, (1995), 7 states have internal predecessors, (1995), 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 23:59:29,540 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 285.0) internal successors, (1995), 7 states have internal predecessors, (1995), 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 23:59:29,542 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 115 flow. Second operand 6 states and 869 transitions. [2023-08-23 23:59:29,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 389 flow [2023-08-23 23:59:29,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 23:59:29,548 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-23 23:59:29,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, 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 23:59:29,550 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-23 23:59:29,550 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-23 23:59:29,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 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 23:59:29,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:29,553 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 23:59:29,559 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 23:59:29,757 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 23:59:29,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:29,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:29,758 INFO L85 PathProgramCache]: Analyzing trace with hash -173566194, now seen corresponding path program 1 times [2023-08-23 23:59:29,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:29,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730624387] [2023-08-23 23:59:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:29,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:59:29,774 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 23:59:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 23:59:29,807 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 23:59:29,807 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 23:59:29,808 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-23 23:59:29,808 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-23 23:59:29,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 23:59:29,808 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-23 23:59:29,809 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 23:59:29,809 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 23:59:29,836 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 23:59:29,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 197 transitions, 426 flow [2023-08-23 23:59:29,878 INFO L124 PetriNetUnfolderBase]: 44/328 cut-off events. [2023-08-23 23:59:29,878 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 23:59:29,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 328 events. 44/328 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1011 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 269. Up to 10 conditions per place. [2023-08-23 23:59:29,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 197 transitions, 426 flow [2023-08-23 23:59:29,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 197 transitions, 426 flow [2023-08-23 23:59:29,884 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:59:29,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 197 transitions, 426 flow [2023-08-23 23:59:29,885 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 197 transitions, 426 flow [2023-08-23 23:59:29,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 197 transitions, 426 flow [2023-08-23 23:59:29,919 INFO L124 PetriNetUnfolderBase]: 44/328 cut-off events. [2023-08-23 23:59:29,919 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 23:59:29,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 328 events. 44/328 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1011 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 269. Up to 10 conditions per place. [2023-08-23 23:59:29,936 INFO L119 LiptonReduction]: Number of co-enabled transitions 21632 [2023-08-23 23:59:32,964 INFO L134 LiptonReduction]: Checked pairs total: 54755 [2023-08-23 23:59:32,965 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-23 23:59:32,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:59:32,966 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;@434b372c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:59:32,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-23 23:59:32,968 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:59:32,968 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-23 23:59:32,968 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:59:32,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:59:32,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-23 23:59:32,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 23:59:32,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:59:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash 41261685, now seen corresponding path program 1 times [2023-08-23 23:59:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:59:32,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949260545] [2023-08-23 23:59:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:59:32,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:59:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:59:32,992 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 23:59:32,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:59:32,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949260545] [2023-08-23 23:59:32,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949260545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:59:32,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:59:32,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:59:32,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134509547] [2023-08-23 23:59:32,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:59:32,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:59:32,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:59:32,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:59:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:59:32,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 339 [2023-08-23 23:59:32,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 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 23:59:32,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:59:32,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 339 [2023-08-23 23:59:32,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:00:04,652 INFO L124 PetriNetUnfolderBase]: 400899/521414 cut-off events. [2023-08-24 00:00:04,652 INFO L125 PetriNetUnfolderBase]: For 13880/13880 co-relation queries the response was YES. [2023-08-24 00:00:05,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046803 conditions, 521414 events. 400899/521414 cut-off events. For 13880/13880 co-relation queries the response was YES. Maximal size of possible extension queue 9155. Compared 3406231 event pairs, 295500 based on Foata normal form. 54304/545378 useless extension candidates. Maximal degree in co-relation 83598. Up to 518010 conditions per place. [2023-08-24 00:00:06,922 INFO L140 encePairwiseOnDemand]: 310/339 looper letters, 58 selfloop transitions, 2 changer transitions 2/69 dead transitions. [2023-08-24 00:00:06,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 294 flow [2023-08-24 00:00:06,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:00:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:00:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2023-08-24 00:00:06,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535889872173058 [2023-08-24 00:00:06,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2023-08-24 00:00:06,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2023-08-24 00:00:06,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:00:06,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2023-08-24 00:00:06,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:06,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:06,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:06,928 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 200 flow. Second operand 3 states and 563 transitions. [2023-08-24 00:00:06,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 294 flow [2023-08-24 00:00:06,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 282 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-24 00:00:06,941 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 144 flow [2023-08-24 00:00:06,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2023-08-24 00:00:06,942 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-24 00:00:06,942 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 144 flow [2023-08-24 00:00:06,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:06,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:06,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:00:06,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 00:00:06,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:06,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:06,943 INFO L85 PathProgramCache]: Analyzing trace with hash 776009917, now seen corresponding path program 1 times [2023-08-24 00:00:06,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:06,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527517892] [2023-08-24 00:00:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:06,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:06,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:00:06,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527517892] [2023-08-24 00:00:06,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527517892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:00:06,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458467295] [2023-08-24 00:00:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:06,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:00:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:00:06,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:00:07,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 00:00:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:07,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:00:07,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:00:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:07,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:00:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:07,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458467295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:00:07,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:00:07,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:00:07,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590953248] [2023-08-24 00:00:07,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:00:07,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:00:07,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:00:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:00:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:00:07,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 339 [2023-08-24 00:00:07,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:07,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:00:07,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 339 [2023-08-24 00:00:07,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:00:29,101 INFO L124 PetriNetUnfolderBase]: 286856/375777 cut-off events. [2023-08-24 00:00:29,101 INFO L125 PetriNetUnfolderBase]: For 15992/15992 co-relation queries the response was YES. [2023-08-24 00:00:29,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779656 conditions, 375777 events. 286856/375777 cut-off events. For 15992/15992 co-relation queries the response was YES. Maximal size of possible extension queue 7008. Compared 2502786 event pairs, 12196 based on Foata normal form. 1330/377107 useless extension candidates. Maximal degree in co-relation 699944. Up to 246357 conditions per place. [2023-08-24 00:00:31,009 INFO L140 encePairwiseOnDemand]: 335/339 looper letters, 146 selfloop transitions, 6 changer transitions 0/159 dead transitions. [2023-08-24 00:00:31,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 159 transitions, 656 flow [2023-08-24 00:00:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:00:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:00:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1091 transitions. [2023-08-24 00:00:31,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363815142576205 [2023-08-24 00:00:31,013 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1091 transitions. [2023-08-24 00:00:31,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1091 transitions. [2023-08-24 00:00:31,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:00:31,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1091 transitions. [2023-08-24 00:00:31,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.83333333333334) internal successors, (1091), 6 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:31,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:31,019 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:31,019 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 144 flow. Second operand 6 states and 1091 transitions. [2023-08-24 00:00:31,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 159 transitions, 656 flow [2023-08-24 00:00:31,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 159 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:00:31,089 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-24 00:00:31,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-24 00:00:31,089 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-08-24 00:00:31,090 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-24 00:00:31,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:31,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:31,090 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 00:00:31,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 00:00:31,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:00:31,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:31,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash -204557798, now seen corresponding path program 1 times [2023-08-24 00:00:31,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:31,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753494233] [2023-08-24 00:00:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:31,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:00:31,308 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:00:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:00:31,339 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:00:31,340 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:00:31,340 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:00:31,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:00:31,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:00:31,340 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:00:31,348 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:00:31,348 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 00:00:31,373 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 00:00:31,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 230 transitions, 505 flow [2023-08-24 00:00:31,414 INFO L124 PetriNetUnfolderBase]: 54/395 cut-off events. [2023-08-24 00:00:31,414 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-24 00:00:31,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 395 events. 54/395 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1237 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 341. Up to 12 conditions per place. [2023-08-24 00:00:31,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 230 transitions, 505 flow [2023-08-24 00:00:31,421 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 230 transitions, 505 flow [2023-08-24 00:00:31,421 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:00:31,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 230 transitions, 505 flow [2023-08-24 00:00:31,421 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 230 transitions, 505 flow [2023-08-24 00:00:31,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 230 transitions, 505 flow [2023-08-24 00:00:31,460 INFO L124 PetriNetUnfolderBase]: 54/395 cut-off events. [2023-08-24 00:00:31,460 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-24 00:00:31,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 395 events. 54/395 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1237 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 341. Up to 12 conditions per place. [2023-08-24 00:00:31,473 INFO L119 LiptonReduction]: Number of co-enabled transitions 32320 [2023-08-24 00:00:34,185 INFO L134 LiptonReduction]: Checked pairs total: 73453 [2023-08-24 00:00:34,185 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-24 00:00:34,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:00:34,187 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;@434b372c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:00:34,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:00:34,189 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:00:34,189 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:00:34,189 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:00:34,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:00:34,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:00:34,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:00:34,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:00:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash 54310135, now seen corresponding path program 1 times [2023-08-24 00:00:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:00:34,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711599387] [2023-08-24 00:00:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:00:34,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:00:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:00:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:00:34,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:00:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711599387] [2023-08-24 00:00:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711599387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:00:34,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:00:34,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:00:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331947577] [2023-08-24 00:00:34,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:00:34,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:00:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:00:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:00:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:00:34,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 391 [2023-08-24 00:00:34,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:00:34,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:00:34,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 391 [2023-08-24 00:00:34,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand