/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_60-invariant_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:04:10,971 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:04:11,065 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 00:04:11,072 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:04:11,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:04:11,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:04:11,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:04:11,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:04:11,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:04:11,111 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:04:11,111 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:04:11,111 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:04:11,111 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:04:11,112 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:04:11,112 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:04:11,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:04:11,113 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:04:11,113 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:04:11,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:04:11,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:04:11,114 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:04:11,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:04:11,115 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:04:11,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:04:11,115 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:04:11,116 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:04:11,116 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:04:11,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:04:11,116 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:04:11,117 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:04:11,117 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:04:11,118 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:04:11,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:04:11,118 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:04:11,118 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:04:11,119 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:04:11,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:04:11,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:04:11,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:04:11,469 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:04:11,469 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:04:11,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-24 00:04:12,785 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:04:13,078 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:04:13,078 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-24 00:04:13,092 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14c107ee/fc3e7f5e88364a59a2636156405d3287/FLAG3cbba32b4 [2023-08-24 00:04:13,104 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14c107ee/fc3e7f5e88364a59a2636156405d3287 [2023-08-24 00:04:13,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:04:13,107 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:04:13,108 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:04:13,108 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:04:13,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:04:13,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa6b48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13, skipping insertion in model container [2023-08-24 00:04:13,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,152 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:04:13,433 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_60-invariant_racefree.i[30176,30189] [2023-08-24 00:04:13,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:04:13,470 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:04:13,503 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:04:13,505 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:04:13,515 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_60-invariant_racefree.i[30176,30189] [2023-08-24 00:04:13,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:04:13,568 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:04:13,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13 WrapperNode [2023-08-24 00:04:13,569 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:04:13,570 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:04:13,570 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:04:13,571 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:04:13,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,605 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,629 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 143 [2023-08-24 00:04:13,630 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:04:13,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:04:13,631 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:04:13,631 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:04:13,638 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,647 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,651 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,653 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,654 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,665 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:04:13,666 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:04:13,666 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:04:13,666 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:04:13,667 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (1/1) ... [2023-08-24 00:04:13,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:04:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:04:13,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 00:04:13,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 00:04:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:04:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:04:13,749 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:04:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:04:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:04:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:04:13,750 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:04:13,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:04:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:04:13,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:04:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:04:13,752 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 00:04:13,860 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:04:13,861 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:04:14,111 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:04:14,118 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:04:14,119 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-08-24 00:04:14,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:04:14 BoogieIcfgContainer [2023-08-24 00:04:14,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:04:14,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:04:14,123 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:04:14,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:04:14,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:04:13" (1/3) ... [2023-08-24 00:04:14,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d4e479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:04:14, skipping insertion in model container [2023-08-24 00:04:14,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:13" (2/3) ... [2023-08-24 00:04:14,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d4e479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:04:14, skipping insertion in model container [2023-08-24 00:04:14,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:04:14" (3/3) ... [2023-08-24 00:04:14,128 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-08-24 00:04:14,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:04:14,145 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 00:04:14,145 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:04:14,241 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:04:14,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 140 transitions, 288 flow [2023-08-24 00:04:14,390 INFO L124 PetriNetUnfolderBase]: 33/197 cut-off events. [2023-08-24 00:04:14,390 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:04:14,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 197 events. 33/197 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 650 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-08-24 00:04:14,400 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 140 transitions, 288 flow [2023-08-24 00:04:14,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 135 transitions, 275 flow [2023-08-24 00:04:14,412 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:04:14,426 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 135 transitions, 275 flow [2023-08-24 00:04:14,429 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 135 transitions, 275 flow [2023-08-24 00:04:14,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 135 transitions, 275 flow [2023-08-24 00:04:14,460 INFO L124 PetriNetUnfolderBase]: 32/192 cut-off events. [2023-08-24 00:04:14,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:14,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 192 events. 32/192 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 640 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-08-24 00:04:14,465 INFO L119 LiptonReduction]: Number of co-enabled transitions 5670 [2023-08-24 00:04:16,955 INFO L134 LiptonReduction]: Checked pairs total: 14740 [2023-08-24 00:04:16,955 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-24 00:04:16,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:04:16,982 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;@39598a82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:04:16,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 00:04:16,990 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:04:16,990 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-08-24 00:04:16,990 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:16,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:16,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:04:16,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:04:16,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash 518401700, now seen corresponding path program 1 times [2023-08-24 00:04:17,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:17,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093905575] [2023-08-24 00:04:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:17,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:17,212 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 00:04:17,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093905575] [2023-08-24 00:04:17,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093905575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:17,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:17,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:04:17,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433506251] [2023-08-24 00:04:17,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:17,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:17,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:17,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:17,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:17,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 239 [2023-08-24 00:04:17,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 62 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 00:04:17,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:17,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 239 [2023-08-24 00:04:17,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:04:17,417 INFO L124 PetriNetUnfolderBase]: 211/528 cut-off events. [2023-08-24 00:04:17,417 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:17,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 528 events. 211/528 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2537 event pairs, 78 based on Foata normal form. 88/536 useless extension candidates. Maximal degree in co-relation 950. Up to 421 conditions per place. [2023-08-24 00:04:17,426 INFO L140 encePairwiseOnDemand]: 217/239 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-24 00:04:17,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 215 flow [2023-08-24 00:04:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:04:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:04:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-24 00:04:17,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578800557880056 [2023-08-24 00:04:17,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-24 00:04:17,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-24 00:04:17,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:04:17,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-24 00:04:17,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:17,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:17,464 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:17,466 INFO L175 Difference]: Start difference. First operand has 46 places, 62 transitions, 129 flow. Second operand 3 states and 400 transitions. [2023-08-24 00:04:17,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 215 flow [2023-08-24 00:04:17,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:04:17,471 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 97 flow [2023-08-24 00:04:17,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-24 00:04:17,481 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-24 00:04:17,482 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 97 flow [2023-08-24 00:04:17,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 00:04:17,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:17,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 00:04:17,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:04:17,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-24 00:04:17,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1111622217, now seen corresponding path program 1 times [2023-08-24 00:04:17,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:17,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257066015] [2023-08-24 00:04:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:17,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:17,530 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:04:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:17,561 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:04:17,561 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:04:17,563 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-24 00:04:17,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 00:04:17,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-24 00:04:17,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 00:04:17,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:04:17,565 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 00:04:17,567 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:04:17,568 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:04:17,586 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:04:17,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 187 transitions, 392 flow [2023-08-24 00:04:17,621 INFO L124 PetriNetUnfolderBase]: 57/326 cut-off events. [2023-08-24 00:04:17,621 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:04:17,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 326 events. 57/326 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1230 event pairs, 0 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 199. Up to 9 conditions per place. [2023-08-24 00:04:17,624 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 187 transitions, 392 flow [2023-08-24 00:04:17,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 187 transitions, 392 flow [2023-08-24 00:04:17,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:04:17,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 187 transitions, 392 flow [2023-08-24 00:04:17,627 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 187 transitions, 392 flow [2023-08-24 00:04:17,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 187 transitions, 392 flow [2023-08-24 00:04:17,669 INFO L124 PetriNetUnfolderBase]: 57/326 cut-off events. [2023-08-24 00:04:17,670 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:04:17,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 326 events. 57/326 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1230 event pairs, 0 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 199. Up to 9 conditions per place. [2023-08-24 00:04:17,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-08-24 00:04:20,218 INFO L134 LiptonReduction]: Checked pairs total: 52236 [2023-08-24 00:04:20,218 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-24 00:04:20,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:04:20,223 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;@39598a82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:04:20,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 00:04:20,225 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:04:20,225 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-08-24 00:04:20,225 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:20,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:20,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:04:20,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:04:20,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:20,226 INFO L85 PathProgramCache]: Analyzing trace with hash 862742031, now seen corresponding path program 1 times [2023-08-24 00:04:20,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:20,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658572822] [2023-08-24 00:04:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:20,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:20,274 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 00:04:20,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:20,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658572822] [2023-08-24 00:04:20,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658572822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:20,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:20,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:04:20,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818564718] [2023-08-24 00:04:20,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:20,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:20,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:20,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:20,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:20,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 314 [2023-08-24 00:04:20,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 95 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:20,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:20,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 314 [2023-08-24 00:04:20,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:04:21,057 INFO L124 PetriNetUnfolderBase]: 5106/8868 cut-off events. [2023-08-24 00:04:21,057 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-24 00:04:21,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16817 conditions, 8868 events. 5106/8868 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 65959 event pairs, 4438 based on Foata normal form. 1714/8918 useless extension candidates. Maximal degree in co-relation 6460. Up to 7850 conditions per place. [2023-08-24 00:04:21,124 INFO L140 encePairwiseOnDemand]: 285/314 looper letters, 58 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-24 00:04:21,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 304 flow [2023-08-24 00:04:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:04:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:04:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-24 00:04:21,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5573248407643312 [2023-08-24 00:04:21,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-24 00:04:21,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-24 00:04:21,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:04:21,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-24 00:04:21,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 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 00:04:21,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 00:04:21,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 00:04:21,132 INFO L175 Difference]: Start difference. First operand has 70 places, 95 transitions, 208 flow. Second operand 3 states and 525 transitions. [2023-08-24 00:04:21,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 304 flow [2023-08-24 00:04:21,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:04:21,135 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 168 flow [2023-08-24 00:04:21,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-08-24 00:04:21,136 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-24 00:04:21,137 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 168 flow [2023-08-24 00:04:21,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:21,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:21,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:04:21,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 00:04:21,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:04:21,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash 54383927, now seen corresponding path program 1 times [2023-08-24 00:04:21,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:21,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141475832] [2023-08-24 00:04:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:21,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:21,263 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 00:04:21,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:21,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141475832] [2023-08-24 00:04:21,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141475832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:21,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:21,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 00:04:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59086110] [2023-08-24 00:04:21,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:21,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:21,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:21,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:21,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 314 [2023-08-24 00:04:21,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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 00:04:21,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:21,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 314 [2023-08-24 00:04:21,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:04:22,425 INFO L124 PetriNetUnfolderBase]: 9204/15516 cut-off events. [2023-08-24 00:04:22,425 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-24 00:04:22,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30400 conditions, 15516 events. 9204/15516 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 115464 event pairs, 4766 based on Foata normal form. 0/13319 useless extension candidates. Maximal degree in co-relation 30354. Up to 10034 conditions per place. [2023-08-24 00:04:22,527 INFO L140 encePairwiseOnDemand]: 297/314 looper letters, 87 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2023-08-24 00:04:22,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 448 flow [2023-08-24 00:04:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:04:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:04:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-24 00:04:22,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265392781316348 [2023-08-24 00:04:22,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-24 00:04:22,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-24 00:04:22,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:04:22,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-24 00:04:22,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 00:04:22,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 00:04:22,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 00:04:22,535 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 168 flow. Second operand 3 states and 496 transitions. [2023-08-24 00:04:22,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 448 flow [2023-08-24 00:04:22,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:04:22,538 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 252 flow [2023-08-24 00:04:22,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2023-08-24 00:04:22,539 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-24 00:04:22,540 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 252 flow [2023-08-24 00:04:22,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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 00:04:22,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:22,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 00:04:22,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 00:04:22,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 00:04:22,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2079060280, now seen corresponding path program 1 times [2023-08-24 00:04:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:22,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333571135] [2023-08-24 00:04:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:22,556 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:04:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:22,573 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:04:22,573 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:04:22,573 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-24 00:04:22,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 00:04:22,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-24 00:04:22,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 00:04:22,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 00:04:22,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:04:22,574 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:04:22,575 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:04:22,575 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:04:22,597 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:04:22,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 234 transitions, 498 flow [2023-08-24 00:04:22,654 INFO L124 PetriNetUnfolderBase]: 86/488 cut-off events. [2023-08-24 00:04:22,655 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:04:22,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 488 events. 86/488 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1953 event pairs, 1 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 334. Up to 16 conditions per place. [2023-08-24 00:04:22,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 234 transitions, 498 flow [2023-08-24 00:04:22,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 234 transitions, 498 flow [2023-08-24 00:04:22,665 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:04:22,666 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 234 transitions, 498 flow [2023-08-24 00:04:22,666 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 234 transitions, 498 flow [2023-08-24 00:04:22,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 234 transitions, 498 flow [2023-08-24 00:04:22,797 INFO L124 PetriNetUnfolderBase]: 86/488 cut-off events. [2023-08-24 00:04:22,798 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:04:22,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 488 events. 86/488 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1953 event pairs, 1 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 334. Up to 16 conditions per place. [2023-08-24 00:04:22,830 INFO L119 LiptonReduction]: Number of co-enabled transitions 31050 [2023-08-24 00:04:25,480 INFO L134 LiptonReduction]: Checked pairs total: 92787 [2023-08-24 00:04:25,480 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-24 00:04:25,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:04:25,483 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;@39598a82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:04:25,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 00:04:25,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:04:25,485 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-08-24 00:04:25,485 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:25,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:25,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:04:25,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:04:25,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:25,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1281544970, now seen corresponding path program 1 times [2023-08-24 00:04:25,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:25,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308618437] [2023-08-24 00:04:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:25,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:25,511 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 00:04:25,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:25,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308618437] [2023-08-24 00:04:25,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308618437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:25,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:25,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:04:25,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233122629] [2023-08-24 00:04:25,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:25,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:25,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:25,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:25,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 392 [2023-08-24 00:04:25,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 126 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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 00:04:25,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:25,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 392 [2023-08-24 00:04:25,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:04:34,566 INFO L124 PetriNetUnfolderBase]: 95946/143113 cut-off events. [2023-08-24 00:04:34,566 INFO L125 PetriNetUnfolderBase]: For 1675/1675 co-relation queries the response was YES. [2023-08-24 00:04:34,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274532 conditions, 143113 events. 95946/143113 cut-off events. For 1675/1675 co-relation queries the response was YES. Maximal size of possible extension queue 4011. Compared 1198054 event pairs, 72377 based on Foata normal form. 23004/143729 useless extension candidates. Maximal degree in co-relation 43084. Up to 130015 conditions per place. [2023-08-24 00:04:35,639 INFO L140 encePairwiseOnDemand]: 354/392 looper letters, 73 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-24 00:04:35,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 105 transitions, 390 flow [2023-08-24 00:04:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:04:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:04:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-24 00:04:35,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561224489795918 [2023-08-24 00:04:35,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-24 00:04:35,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-24 00:04:35,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:04:35,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-24 00:04:35,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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 00:04:35,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 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 00:04:35,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 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 00:04:35,649 INFO L175 Difference]: Start difference. First operand has 92 places, 126 transitions, 282 flow. Second operand 3 states and 654 transitions. [2023-08-24 00:04:35,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 105 transitions, 390 flow [2023-08-24 00:04:35,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 105 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:04:35,657 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 222 flow [2023-08-24 00:04:35,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-08-24 00:04:35,660 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2023-08-24 00:04:35,661 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 222 flow [2023-08-24 00:04:35,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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 00:04:35,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:35,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:04:35,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:04:35,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:04:35,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1216565054, now seen corresponding path program 1 times [2023-08-24 00:04:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:35,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272985966] [2023-08-24 00:04:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:35,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:35,732 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 00:04:35,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:35,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272985966] [2023-08-24 00:04:35,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272985966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:35,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:35,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 00:04:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274530759] [2023-08-24 00:04:35,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:35,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:35,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:35,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:35,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:35,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 392 [2023-08-24 00:04:35,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 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 00:04:35,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:35,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 392 [2023-08-24 00:04:35,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:05:00,140 INFO L124 PetriNetUnfolderBase]: 293839/418811 cut-off events. [2023-08-24 00:05:00,140 INFO L125 PetriNetUnfolderBase]: For 4232/4232 co-relation queries the response was YES. [2023-08-24 00:05:01,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829298 conditions, 418811 events. 293839/418811 cut-off events. For 4232/4232 co-relation queries the response was YES. Maximal size of possible extension queue 10425. Compared 3465942 event pairs, 134570 based on Foata normal form. 0/368917 useless extension candidates. Maximal degree in co-relation 829241. Up to 259359 conditions per place. [2023-08-24 00:05:02,215 INFO L140 encePairwiseOnDemand]: 371/392 looper letters, 122 selfloop transitions, 12 changer transitions 0/148 dead transitions. [2023-08-24 00:05:02,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 148 transitions, 613 flow [2023-08-24 00:05:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:05:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:05:02,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-08-24 00:05:02,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263605442176871 [2023-08-24 00:05:02,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-08-24 00:05:02,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-08-24 00:05:02,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:05:02,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-08-24 00:05:02,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 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 00:05:02,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 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 00:05:02,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 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 00:05:02,225 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 222 flow. Second operand 3 states and 619 transitions. [2023-08-24 00:05:02,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 148 transitions, 613 flow [2023-08-24 00:05:02,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 00:05:02,241 INFO L231 Difference]: Finished difference. Result has 97 places, 101 transitions, 326 flow [2023-08-24 00:05:02,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=97, PETRI_TRANSITIONS=101} [2023-08-24 00:05:02,243 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2023-08-24 00:05:02,243 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 101 transitions, 326 flow [2023-08-24 00:05:02,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 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 00:05:02,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:05:02,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:05:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 00:05:02,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:05:02,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:05:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1394044065, now seen corresponding path program 1 times [2023-08-24 00:05:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:05:02,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431563648] [2023-08-24 00:05:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:05:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:05:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:05:02,317 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 00:05:02,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:05:02,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431563648] [2023-08-24 00:05:02,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431563648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:05:02,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276153392] [2023-08-24 00:05:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:05:02,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:05:02,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:05:02,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:05:02,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 00:05:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:05:02,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:05:02,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:05:02,537 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 00:05:02,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:05:02,562 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 00:05:02,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276153392] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:05:02,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:05:02,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:05:02,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486829559] [2023-08-24 00:05:02,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:05:02,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:05:02,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:05:02,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:05:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:05:02,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 392 [2023-08-24 00:05:02,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 101 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 180.85714285714286) internal successors, (1266), 7 states have internal predecessors, (1266), 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 00:05:02,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:05:02,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 392 [2023-08-24 00:05:02,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:05:03,070 INFO L124 PetriNetUnfolderBase]: 1986/3264 cut-off events. [2023-08-24 00:05:03,070 INFO L125 PetriNetUnfolderBase]: For 1204/1204 co-relation queries the response was YES. [2023-08-24 00:05:03,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7455 conditions, 3264 events. 1986/3264 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18559 event pairs, 75 based on Foata normal form. 322/3539 useless extension candidates. Maximal degree in co-relation 7442. Up to 1932 conditions per place. [2023-08-24 00:05:03,081 INFO L140 encePairwiseOnDemand]: 389/392 looper letters, 52 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-08-24 00:05:03,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 273 flow [2023-08-24 00:05:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:05:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:05:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1127 transitions. [2023-08-24 00:05:03,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-08-24 00:05:03,085 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1127 transitions. [2023-08-24 00:05:03,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1127 transitions. [2023-08-24 00:05:03,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:05:03,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1127 transitions. [2023-08-24 00:05:03,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 187.83333333333334) internal successors, (1127), 6 states have internal predecessors, (1127), 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 00:05:03,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 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 00:05:03,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 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 00:05:03,093 INFO L175 Difference]: Start difference. First operand has 97 places, 101 transitions, 326 flow. Second operand 6 states and 1127 transitions. [2023-08-24 00:05:03,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 273 flow [2023-08-24 00:05:03,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 61 transitions, 265 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 00:05:03,096 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 95 flow [2023-08-24 00:05:03,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=95, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-24 00:05:03,097 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -50 predicate places. [2023-08-24 00:05:03,097 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 95 flow [2023-08-24 00:05:03,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 180.85714285714286) internal successors, (1266), 7 states have internal predecessors, (1266), 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 00:05:03,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:05:03,098 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 00:05:03,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 00:05:03,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:05:03,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-24 00:05:03,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:05:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash -549592537, now seen corresponding path program 1 times [2023-08-24 00:05:03,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:05:03,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156502218] [2023-08-24 00:05:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:05:03,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:05:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:05:03,327 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:05:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:05:03,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:05:03,359 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:05:03,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-24 00:05:03,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-24 00:05:03,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-24 00:05:03,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-24 00:05:03,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-24 00:05:03,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-24 00:05:03,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 00:05:03,360 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 00:05:03,361 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:05:03,361 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:05:03,398 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:05:03,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 281 transitions, 606 flow [2023-08-24 00:05:03,479 INFO L124 PetriNetUnfolderBase]: 127/718 cut-off events. [2023-08-24 00:05:03,479 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:05:03,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 718 events. 127/718 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3038 event pairs, 6 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 508. Up to 32 conditions per place. [2023-08-24 00:05:03,491 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 281 transitions, 606 flow [2023-08-24 00:05:03,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 281 transitions, 606 flow [2023-08-24 00:05:03,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:05:03,497 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 281 transitions, 606 flow [2023-08-24 00:05:03,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 281 transitions, 606 flow [2023-08-24 00:05:03,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 281 transitions, 606 flow [2023-08-24 00:05:03,575 INFO L124 PetriNetUnfolderBase]: 127/718 cut-off events. [2023-08-24 00:05:03,575 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:05:03,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 718 events. 127/718 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3038 event pairs, 6 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 508. Up to 32 conditions per place. [2023-08-24 00:05:03,613 INFO L119 LiptonReduction]: Number of co-enabled transitions 50040 [2023-08-24 00:05:06,229 INFO L134 LiptonReduction]: Checked pairs total: 158268 [2023-08-24 00:05:06,230 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-08-24 00:05:06,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:05:06,232 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;@39598a82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:05:06,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-24 00:05:06,234 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:05:06,234 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-08-24 00:05:06,234 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:05:06,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:05:06,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:05:06,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-24 00:05:06,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:05:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1781049672, now seen corresponding path program 1 times [2023-08-24 00:05:06,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:05:06,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966211713] [2023-08-24 00:05:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:05:06,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:05:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:05:06,258 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 00:05:06,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:05:06,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966211713] [2023-08-24 00:05:06,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966211713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:05:06,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:05:06,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:05:06,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102917708] [2023-08-24 00:05:06,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:05:06,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:05:06,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:05:06,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:05:06,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:05:06,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 477 [2023-08-24 00:05:06,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 155 transitions, 354 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 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 00:05:06,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:05:06,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 477 [2023-08-24 00:05:06,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand