/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_37-indirect_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:02:30,553 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:02:30,645 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 00:02:30,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:02:30,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:02:30,684 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:02:30,685 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:02:30,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:02:30,687 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:02:30,690 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:02:30,691 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:02:30,691 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:02:30,691 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:02:30,692 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:02:30,693 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:02:30,693 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:02:30,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:02:30,693 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:02:30,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:02:30,694 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:02:30,694 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:02:30,694 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:02:30,695 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:02:30,695 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:02:30,695 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:02:30,696 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:02:30,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:02:30,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:02:30,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:02:30,697 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:02:30,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:02:30,698 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:02:30,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:02:30,698 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:02:30,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:02:30,699 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:02:31,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:02:31,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:02:31,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:02:31,084 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:02:31,085 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:02:31,086 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-08-24 00:02:32,314 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:02:32,655 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:02:32,656 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-08-24 00:02:32,675 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/579387e8c/6bd809809fbd470884637f5c7c09bb2c/FLAGe5f16590a [2023-08-24 00:02:32,693 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/579387e8c/6bd809809fbd470884637f5c7c09bb2c [2023-08-24 00:02:32,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:02:32,699 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:02:32,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:02:32,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:02:32,706 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:02:32,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:02:32" (1/1) ... [2023-08-24 00:02:32,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b0932a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:32, skipping insertion in model container [2023-08-24 00:02:32,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:02:32" (1/1) ... [2023-08-24 00:02:32,762 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:02:33,066 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_37-indirect_racing.i[30176,30189] [2023-08-24 00:02:33,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:02:33,104 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:02:33,135 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:02:33,137 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:02:33,150 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_37-indirect_racing.i[30176,30189] [2023-08-24 00:02:33,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:02:33,207 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:02:33,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33 WrapperNode [2023-08-24 00:02:33,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:02:33,209 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:02:33,210 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:02:33,210 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:02:33,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,243 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,266 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2023-08-24 00:02:33,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:02:33,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:02:33,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:02:33,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:02:33,274 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,277 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,278 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,286 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,288 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,289 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:02:33,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:02:33,293 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:02:33,293 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:02:33,294 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (1/1) ... [2023-08-24 00:02:33,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:02:33,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:02:33,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 00:02:33,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 00:02:33,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:02:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:02:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:02:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:02:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:02:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:02:33,391 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:02:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:02:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:02:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:02:33,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:02:33,393 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 00:02:33,507 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:02:33,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:02:33,672 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:02:33,683 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:02:33,683 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-24 00:02:33,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:02:33 BoogieIcfgContainer [2023-08-24 00:02:33,686 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:02:33,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:02:33,688 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:02:33,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:02:33,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:02:32" (1/3) ... [2023-08-24 00:02:33,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b813712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:02:33, skipping insertion in model container [2023-08-24 00:02:33,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:33" (2/3) ... [2023-08-24 00:02:33,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b813712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:02:33, skipping insertion in model container [2023-08-24 00:02:33,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:02:33" (3/3) ... [2023-08-24 00:02:33,694 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-08-24 00:02:33,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:02:33,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 00:02:33,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:02:33,769 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:02:33,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 110 transitions, 228 flow [2023-08-24 00:02:33,916 INFO L124 PetriNetUnfolderBase]: 17/144 cut-off events. [2023-08-24 00:02:33,917 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:02:33,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 144 events. 17/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 344 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2023-08-24 00:02:33,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 110 transitions, 228 flow [2023-08-24 00:02:33,928 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 105 transitions, 215 flow [2023-08-24 00:02:33,931 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:02:33,940 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 105 transitions, 215 flow [2023-08-24 00:02:33,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 105 transitions, 215 flow [2023-08-24 00:02:33,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 105 transitions, 215 flow [2023-08-24 00:02:33,972 INFO L124 PetriNetUnfolderBase]: 16/139 cut-off events. [2023-08-24 00:02:33,972 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:33,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 139 events. 16/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 326 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2023-08-24 00:02:33,977 INFO L119 LiptonReduction]: Number of co-enabled transitions 2560 [2023-08-24 00:02:36,839 INFO L134 LiptonReduction]: Checked pairs total: 4307 [2023-08-24 00:02:36,840 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-24 00:02:36,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:02:36,860 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;@3f82c17, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:02:36,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:02:36,863 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:02:36,864 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-24 00:02:36,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:36,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:36,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:02:36,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:36,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:36,870 INFO L85 PathProgramCache]: Analyzing trace with hash 13011145, now seen corresponding path program 1 times [2023-08-24 00:02:36,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:36,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141756485] [2023-08-24 00:02:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:36,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:37,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:37,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141756485] [2023-08-24 00:02:37,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141756485] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:02:37,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:02:37,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:02:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277638969] [2023-08-24 00:02:37,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:02:37,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:02:37,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:02:37,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:02:37,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 198 [2023-08-24 00:02:37,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 31 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:37,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:37,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 198 [2023-08-24 00:02:37,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:37,265 INFO L124 PetriNetUnfolderBase]: 90/214 cut-off events. [2023-08-24 00:02:37,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:37,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 214 events. 90/214 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 890 event pairs, 0 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 399. Up to 190 conditions per place. [2023-08-24 00:02:37,274 INFO L140 encePairwiseOnDemand]: 187/198 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-08-24 00:02:37,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 137 flow [2023-08-24 00:02:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:02:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:02:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2023-08-24 00:02:37,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235690235690236 [2023-08-24 00:02:37,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2023-08-24 00:02:37,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2023-08-24 00:02:37,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:37,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2023-08-24 00:02:37,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:37,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:37,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:37,331 INFO L175 Difference]: Start difference. First operand has 26 places, 31 transitions, 67 flow. Second operand 3 states and 311 transitions. [2023-08-24 00:02:37,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 137 flow [2023-08-24 00:02:37,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:02:37,338 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-08-24 00:02:37,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-24 00:02:37,345 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-24 00:02:37,345 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-08-24 00:02:37,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:37,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:37,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 00:02:37,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:02:37,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:37,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:37,347 INFO L85 PathProgramCache]: Analyzing trace with hash -369117390, now seen corresponding path program 1 times [2023-08-24 00:02:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:37,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198035754] [2023-08-24 00:02:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:37,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:37,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:02:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:37,450 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:02:37,450 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:02:37,452 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:02:37,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:02:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:02:37,454 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 00:02:37,458 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:02:37,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:02:37,496 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:02:37,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2023-08-24 00:02:37,532 INFO L124 PetriNetUnfolderBase]: 31/237 cut-off events. [2023-08-24 00:02:37,532 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:02:37,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 237 events. 31/237 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 718 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-08-24 00:02:37,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 144 transitions, 306 flow [2023-08-24 00:02:37,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 144 transitions, 306 flow [2023-08-24 00:02:37,538 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:02:37,539 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 144 transitions, 306 flow [2023-08-24 00:02:37,539 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 144 transitions, 306 flow [2023-08-24 00:02:37,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2023-08-24 00:02:37,566 INFO L124 PetriNetUnfolderBase]: 31/237 cut-off events. [2023-08-24 00:02:37,567 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:02:37,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 237 events. 31/237 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 718 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-08-24 00:02:37,575 INFO L119 LiptonReduction]: Number of co-enabled transitions 7872 [2023-08-24 00:02:40,377 INFO L134 LiptonReduction]: Checked pairs total: 15612 [2023-08-24 00:02:40,378 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-24 00:02:40,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:02:40,381 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;@3f82c17, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:02:40,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:02:40,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:02:40,384 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:02:40,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:40,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:40,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:02:40,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:40,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:40,385 INFO L85 PathProgramCache]: Analyzing trace with hash 21809259, now seen corresponding path program 1 times [2023-08-24 00:02:40,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:40,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789596073] [2023-08-24 00:02:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:40,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:40,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:40,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789596073] [2023-08-24 00:02:40,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789596073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:02:40,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:02:40,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:02:40,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271120843] [2023-08-24 00:02:40,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:02:40,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:02:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:02:40,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:02:40,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 252 [2023-08-24 00:02:40,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:40,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:40,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 252 [2023-08-24 00:02:40,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:40,765 INFO L124 PetriNetUnfolderBase]: 1490/2698 cut-off events. [2023-08-24 00:02:40,766 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:02:40,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5210 conditions, 2698 events. 1490/2698 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 15930 event pairs, 680 based on Foata normal form. 390/2789 useless extension candidates. Maximal degree in co-relation 536. Up to 2431 conditions per place. [2023-08-24 00:02:40,777 INFO L140 encePairwiseOnDemand]: 235/252 looper letters, 32 selfloop transitions, 2 changer transitions 8/50 dead transitions. [2023-08-24 00:02:40,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 200 flow [2023-08-24 00:02:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:02:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:02:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-24 00:02:40,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2023-08-24 00:02:40,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-24 00:02:40,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-24 00:02:40,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:40,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-24 00:02:40,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:40,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:40,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:40,784 INFO L175 Difference]: Start difference. First operand has 43 places, 54 transitions, 126 flow. Second operand 3 states and 404 transitions. [2023-08-24 00:02:40,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 200 flow [2023-08-24 00:02:40,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:02:40,786 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 88 flow [2023-08-24 00:02:40,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2023-08-24 00:02:40,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-24 00:02:40,788 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 88 flow [2023-08-24 00:02:40,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:40,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:40,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:02:40,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 00:02:40,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:40,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:40,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1695245, now seen corresponding path program 1 times [2023-08-24 00:02:40,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:40,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874881940] [2023-08-24 00:02:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:40,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:40,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:40,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874881940] [2023-08-24 00:02:40,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874881940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:02:40,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636420581] [2023-08-24 00:02:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:40,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:02:40,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:02:40,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:02:40,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 00:02:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:40,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:02:40,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:02:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:40,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:02:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:40,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636420581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:02:40,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:02:40,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:02:40,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160046228] [2023-08-24 00:02:40,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:02:41,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:02:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:41,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:02:41,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:02:41,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 252 [2023-08-24 00:02:41,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:41,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:41,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 252 [2023-08-24 00:02:41,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:41,146 INFO L124 PetriNetUnfolderBase]: 376/769 cut-off events. [2023-08-24 00:02:41,147 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-24 00:02:41,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3891 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2023-08-24 00:02:41,151 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-24 00:02:41,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2023-08-24 00:02:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:02:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:02:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 620 transitions. [2023-08-24 00:02:41,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-08-24 00:02:41,154 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 620 transitions. [2023-08-24 00:02:41,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 620 transitions. [2023-08-24 00:02:41,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:41,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 620 transitions. [2023-08-24 00:02:41,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:41,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:41,159 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:41,159 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 88 flow. Second operand 5 states and 620 transitions. [2023-08-24 00:02:41,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2023-08-24 00:02:41,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:02:41,162 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-24 00:02:41,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-24 00:02:41,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-08-24 00:02:41,163 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-24 00:02:41,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:41,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:41,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 00:02:41,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 00:02:41,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:02:41,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:41,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:41,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1797522875, now seen corresponding path program 1 times [2023-08-24 00:02:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:41,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144194311] [2023-08-24 00:02:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:41,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:41,391 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:02:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:41,417 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:02:41,417 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:02:41,417 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:02:41,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:02:41,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:02:41,418 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:02:41,418 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:02:41,419 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:02:41,449 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:02:41,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 178 transitions, 386 flow [2023-08-24 00:02:41,484 INFO L124 PetriNetUnfolderBase]: 50/363 cut-off events. [2023-08-24 00:02:41,484 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:02:41,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1205 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 245. Up to 16 conditions per place. [2023-08-24 00:02:41,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 178 transitions, 386 flow [2023-08-24 00:02:41,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 178 transitions, 386 flow [2023-08-24 00:02:41,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:02:41,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 178 transitions, 386 flow [2023-08-24 00:02:41,490 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 178 transitions, 386 flow [2023-08-24 00:02:41,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 178 transitions, 386 flow [2023-08-24 00:02:41,544 INFO L124 PetriNetUnfolderBase]: 50/363 cut-off events. [2023-08-24 00:02:41,544 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:02:41,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 363 events. 50/363 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1205 event pairs, 1 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 245. Up to 16 conditions per place. [2023-08-24 00:02:41,558 INFO L119 LiptonReduction]: Number of co-enabled transitions 15168 [2023-08-24 00:02:44,531 INFO L134 LiptonReduction]: Checked pairs total: 33369 [2023-08-24 00:02:44,531 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-24 00:02:44,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:02:44,533 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;@3f82c17, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:02:44,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:02:44,535 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:02:44,535 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:02:44,535 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:44,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:44,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:02:44,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:44,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash 32238774, now seen corresponding path program 1 times [2023-08-24 00:02:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:44,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873005959] [2023-08-24 00:02:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:44,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:44,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:44,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873005959] [2023-08-24 00:02:44,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873005959] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:02:44,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:02:44,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:02:44,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793279195] [2023-08-24 00:02:44,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:02:44,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:02:44,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:02:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:02:44,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 305 [2023-08-24 00:02:44,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 73 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:44,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:44,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 305 [2023-08-24 00:02:44,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:48,035 INFO L124 PetriNetUnfolderBase]: 29423/42581 cut-off events. [2023-08-24 00:02:48,035 INFO L125 PetriNetUnfolderBase]: For 1321/1321 co-relation queries the response was YES. [2023-08-24 00:02:48,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84855 conditions, 42581 events. 29423/42581 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 276098 event pairs, 19125 based on Foata normal form. 4661/43537 useless extension candidates. Maximal degree in co-relation 7443. Up to 41391 conditions per place. [2023-08-24 00:02:48,251 INFO L140 encePairwiseOnDemand]: 282/305 looper letters, 44 selfloop transitions, 2 changer transitions 9/63 dead transitions. [2023-08-24 00:02:48,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 264 flow [2023-08-24 00:02:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:02:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:02:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-24 00:02:48,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475409836065573 [2023-08-24 00:02:48,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-24 00:02:48,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-24 00:02:48,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:48,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-24 00:02:48,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:48,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:48,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:48,258 INFO L175 Difference]: Start difference. First operand has 57 places, 73 transitions, 176 flow. Second operand 3 states and 501 transitions. [2023-08-24 00:02:48,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 264 flow [2023-08-24 00:02:48,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:02:48,265 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 121 flow [2023-08-24 00:02:48,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-08-24 00:02:48,268 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-08-24 00:02:48,268 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 121 flow [2023-08-24 00:02:48,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:48,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:48,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:02:48,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:02:48,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:48,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1317313396, now seen corresponding path program 1 times [2023-08-24 00:02:48,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:48,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321927338] [2023-08-24 00:02:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:48,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:48,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:48,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321927338] [2023-08-24 00:02:48,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321927338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:02:48,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446784932] [2023-08-24 00:02:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:48,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:02:48,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:02:48,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:02:48,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 00:02:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:48,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:02:48,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:02:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:48,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:02:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:48,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446784932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:02:48,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:02:48,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 00:02:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168509505] [2023-08-24 00:02:48,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:02:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:02:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:48,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:02:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 00:02:48,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 305 [2023-08-24 00:02:48,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:48,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:48,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 305 [2023-08-24 00:02:48,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:02:49,458 INFO L124 PetriNetUnfolderBase]: 7582/12187 cut-off events. [2023-08-24 00:02:49,458 INFO L125 PetriNetUnfolderBase]: For 4374/4374 co-relation queries the response was YES. [2023-08-24 00:02:49,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81270 event pairs, 0 based on Foata normal form. 1098/13285 useless extension candidates. Maximal degree in co-relation 3138. Up to 7322 conditions per place. [2023-08-24 00:02:49,524 INFO L140 encePairwiseOnDemand]: 302/305 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-08-24 00:02:49,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 411 flow [2023-08-24 00:02:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:02:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:02:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 934 transitions. [2023-08-24 00:02:49,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103825136612021 [2023-08-24 00:02:49,530 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 934 transitions. [2023-08-24 00:02:49,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 934 transitions. [2023-08-24 00:02:49,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:02:49,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 934 transitions. [2023-08-24 00:02:49,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.66666666666666) internal successors, (934), 6 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:49,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:49,538 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:49,539 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 121 flow. Second operand 6 states and 934 transitions. [2023-08-24 00:02:49,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 411 flow [2023-08-24 00:02:49,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 403 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 00:02:49,554 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-24 00:02:49,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-24 00:02:49,556 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-24 00:02:49,556 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-24 00:02:49,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:49,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:49,559 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 00:02:49,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 00:02:49,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-24 00:02:49,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:49,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2080001944, now seen corresponding path program 1 times [2023-08-24 00:02:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:49,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231497940] [2023-08-24 00:02:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:49,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:49,783 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:02:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:02:49,798 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:02:49,799 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:02:49,799 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:02:49,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:02:49,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 00:02:49,799 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:02:49,800 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:02:49,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:02:49,822 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:02:49,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 212 transitions, 468 flow [2023-08-24 00:02:49,896 INFO L124 PetriNetUnfolderBase]: 81/557 cut-off events. [2023-08-24 00:02:49,897 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:02:49,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 557 events. 81/557 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2148 event pairs, 6 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2023-08-24 00:02:49,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 212 transitions, 468 flow [2023-08-24 00:02:49,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 212 transitions, 468 flow [2023-08-24 00:02:49,911 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:02:49,911 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 212 transitions, 468 flow [2023-08-24 00:02:49,911 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 212 transitions, 468 flow [2023-08-24 00:02:49,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 212 transitions, 468 flow [2023-08-24 00:02:49,970 INFO L124 PetriNetUnfolderBase]: 81/557 cut-off events. [2023-08-24 00:02:49,971 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:02:49,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 557 events. 81/557 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2148 event pairs, 6 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 383. Up to 32 conditions per place. [2023-08-24 00:02:49,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 24704 [2023-08-24 00:02:53,176 INFO L134 LiptonReduction]: Checked pairs total: 56831 [2023-08-24 00:02:53,176 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-24 00:02:53,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:02:53,178 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;@3f82c17, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:02:53,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:02:53,180 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:02:53,180 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-24 00:02:53,180 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:53,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:02:53,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:02:53,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:02:53,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:02:53,180 INFO L85 PathProgramCache]: Analyzing trace with hash 44360575, now seen corresponding path program 1 times [2023-08-24 00:02:53,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:02:53,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639444375] [2023-08-24 00:02:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:02:53,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:02:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:02:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:02:53,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:02:53,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639444375] [2023-08-24 00:02:53,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639444375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:02:53,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:02:53,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:02:53,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320203200] [2023-08-24 00:02:53,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:02:53,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:02:53,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:02:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:02:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:02:53,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 360 [2023-08-24 00:02:53,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 92 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:02:53,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:02:53,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 360 [2023-08-24 00:02:53,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:29,211 INFO L124 PetriNetUnfolderBase]: 376438/514439 cut-off events. [2023-08-24 00:03:29,212 INFO L125 PetriNetUnfolderBase]: For 20968/20968 co-relation queries the response was YES. [2023-08-24 00:03:30,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016397 conditions, 514439 events. 376438/514439 cut-off events. For 20968/20968 co-relation queries the response was YES. Maximal size of possible extension queue 9862. Compared 3887904 event pairs, 276677 based on Foata normal form. 78226/555810 useless extension candidates. Maximal degree in co-relation 86248. Up to 490459 conditions per place. [2023-08-24 00:03:31,340 INFO L140 encePairwiseOnDemand]: 331/360 looper letters, 54 selfloop transitions, 2 changer transitions 10/77 dead transitions. [2023-08-24 00:03:31,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 328 flow [2023-08-24 00:03:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:03:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:03:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-24 00:03:31,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518518518518518 [2023-08-24 00:03:31,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-24 00:03:31,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-24 00:03:31,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:31,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-24 00:03:31,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:31,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:31,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:31,352 INFO L175 Difference]: Start difference. First operand has 71 places, 92 transitions, 228 flow. Second operand 3 states and 596 transitions. [2023-08-24 00:03:31,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 328 flow [2023-08-24 00:03:31,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:03:31,362 INFO L231 Difference]: Finished difference. Result has 74 places, 57 transitions, 156 flow [2023-08-24 00:03:31,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2023-08-24 00:03:31,364 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-24 00:03:31,364 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 156 flow [2023-08-24 00:03:31,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:31,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:31,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:03:31,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 00:03:31,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:31,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash 663450586, now seen corresponding path program 1 times [2023-08-24 00:03:31,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:31,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221520668] [2023-08-24 00:03:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:31,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:03:31,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:31,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221520668] [2023-08-24 00:03:31,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221520668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:03:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100211492] [2023-08-24 00:03:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:31,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:03:31,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:03:31,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 00:03:31,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 00:03:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:31,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:03:31,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:03:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:03:31,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:03:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:03:31,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100211492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:03:31,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:03:31,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:03:31,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96386973] [2023-08-24 00:03:31,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:03:31,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:03:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:31,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:03:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:03:31,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 360 [2023-08-24 00:03:31,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:31,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:31,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 360 [2023-08-24 00:03:31,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:47,527 INFO L124 PetriNetUnfolderBase]: 191482/256643 cut-off events. [2023-08-24 00:03:47,527 INFO L125 PetriNetUnfolderBase]: For 22262/22262 co-relation queries the response was YES. [2023-08-24 00:03:47,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533248 conditions, 256643 events. 191482/256643 cut-off events. For 22262/22262 co-relation queries the response was YES. Maximal size of possible extension queue 5486. Compared 1791598 event pairs, 8016 based on Foata normal form. 1110/257752 useless extension candidates. Maximal degree in co-relation 478718. Up to 163477 conditions per place. [2023-08-24 00:03:49,068 INFO L140 encePairwiseOnDemand]: 356/360 looper letters, 136 selfloop transitions, 6 changer transitions 0/153 dead transitions. [2023-08-24 00:03:49,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 153 transitions, 636 flow [2023-08-24 00:03:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:03:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:03:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1141 transitions. [2023-08-24 00:03:49,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282407407407408 [2023-08-24 00:03:49,071 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1141 transitions. [2023-08-24 00:03:49,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1141 transitions. [2023-08-24 00:03:49,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:49,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1141 transitions. [2023-08-24 00:03:49,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.16666666666666) internal successors, (1141), 6 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:49,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:49,077 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:49,077 INFO L175 Difference]: Start difference. First operand has 74 places, 57 transitions, 156 flow. Second operand 6 states and 1141 transitions. [2023-08-24 00:03:49,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 153 transitions, 636 flow [2023-08-24 00:03:49,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 153 transitions, 622 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:03:49,098 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-24 00:03:49,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-24 00:03:49,099 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-08-24 00:03:49,099 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-24 00:03:49,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:49,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:49,100 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 00:03:49,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 00:03:49,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:03:49,307 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:49,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:49,307 INFO L85 PathProgramCache]: Analyzing trace with hash -40573439, now seen corresponding path program 1 times [2023-08-24 00:03:49,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:49,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361230105] [2023-08-24 00:03:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:49,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:49,328 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:03:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:49,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:03:49,356 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:03:49,357 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:03:49,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:03:49,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:03:49,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:03:49,358 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:03:49,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 00:03:49,391 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 00:03:49,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 246 transitions, 552 flow [2023-08-24 00:03:49,497 INFO L124 PetriNetUnfolderBase]: 140/891 cut-off events. [2023-08-24 00:03:49,497 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 00:03:49,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 891 events. 140/891 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4011 event pairs, 23 based on Foata normal form. 0/761 useless extension candidates. Maximal degree in co-relation 602. Up to 80 conditions per place. [2023-08-24 00:03:49,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 246 transitions, 552 flow [2023-08-24 00:03:49,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 246 transitions, 552 flow [2023-08-24 00:03:49,514 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:03:49,514 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 246 transitions, 552 flow [2023-08-24 00:03:49,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 246 transitions, 552 flow [2023-08-24 00:03:49,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 246 transitions, 552 flow [2023-08-24 00:03:49,612 INFO L124 PetriNetUnfolderBase]: 140/891 cut-off events. [2023-08-24 00:03:49,613 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 00:03:49,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 891 events. 140/891 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4011 event pairs, 23 based on Foata normal form. 0/761 useless extension candidates. Maximal degree in co-relation 602. Up to 80 conditions per place. [2023-08-24 00:03:49,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 36480 [2023-08-24 00:03:52,517 INFO L134 LiptonReduction]: Checked pairs total: 90058 [2023-08-24 00:03:52,518 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-24 00:03:52,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:03:52,519 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;@3f82c17, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:03:52,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:03:52,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:03:52,521 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 00:03:52,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:03:52,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:52,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:03:52,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:52,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash 58174310, now seen corresponding path program 1 times [2023-08-24 00:03:52,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:52,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085135429] [2023-08-24 00:03:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:52,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:03:52,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:52,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085135429] [2023-08-24 00:03:52,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085135429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:03:52,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:03:52,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:03:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138563744] [2023-08-24 00:03:52,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:03:52,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:03:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:03:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:03:52,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 415 [2023-08-24 00:03:52,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 111 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:03:52,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:52,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 415 [2023-08-24 00:03:52,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand