/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_41-trylock_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:02:54,636 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:02:54,717 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 00:02:54,723 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:02:54,724 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:02:54,757 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:02:54,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:02:54,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:02:54,759 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:02:54,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:02:54,763 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:02:54,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:02:54,764 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:02:54,765 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:02:54,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:02:54,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:02:54,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:02:54,766 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:02:54,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:02:54,767 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:02:54,767 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:02:54,768 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:02:54,768 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:02:54,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:02:54,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:02:54,769 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:02:54,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:02:54,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:02:54,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:02:54,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:02:54,772 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:02:54,772 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:02:54,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:02:54,772 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:02:54,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:02:54,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:02:55,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:02:55,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:02:55,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:02:55,175 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:02:55,175 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:02:55,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-24 00:02:56,530 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:02:56,840 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:02:56,841 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-24 00:02:56,861 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67329e102/92497251aa4248f7b19a23d0d8a53723/FLAGa9dc56932 [2023-08-24 00:02:56,883 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67329e102/92497251aa4248f7b19a23d0d8a53723 [2023-08-24 00:02:56,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:02:56,889 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:02:56,891 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:02:56,891 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:02:56,894 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:02:56,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:02:56" (1/1) ... [2023-08-24 00:02:56,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aaf85e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:56, skipping insertion in model container [2023-08-24 00:02:56,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:02:56" (1/1) ... [2023-08-24 00:02:56,946 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:02:57,281 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_41-trylock_racefree.i[30176,30189] [2023-08-24 00:02:57,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:02:57,318 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:02:57,349 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:02:57,351 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:02:57,367 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_41-trylock_racefree.i[30176,30189] [2023-08-24 00:02:57,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:02:57,428 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:02:57,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57 WrapperNode [2023-08-24 00:02:57,429 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:02:57,430 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:02:57,430 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:02:57,430 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:02:57,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,490 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2023-08-24 00:02:57,491 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:02:57,491 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:02:57,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:02:57,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:02:57,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,519 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,519 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,525 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,545 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:02:57,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:02:57,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:02:57,547 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:02:57,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (1/1) ... [2023-08-24 00:02:57,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:02:57,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:02:57,595 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 00:02:57,599 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 00:02:57,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:02:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:02:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:02:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:02:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:02:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:02:57,629 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:02:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:02:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-24 00:02:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:02:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:02:57,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:02:57,631 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 00:02:57,758 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:02:57,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:02:57,987 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:02:57,996 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:02:57,996 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-24 00:02:57,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:02:57 BoogieIcfgContainer [2023-08-24 00:02:57,998 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:02:58,000 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:02:58,000 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:02:58,003 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:02:58,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:02:56" (1/3) ... [2023-08-24 00:02:58,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eafa69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:02:58, skipping insertion in model container [2023-08-24 00:02:58,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:02:57" (2/3) ... [2023-08-24 00:02:58,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eafa69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:02:58, skipping insertion in model container [2023-08-24 00:02:58,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:02:57" (3/3) ... [2023-08-24 00:02:58,007 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-08-24 00:02:58,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:02:58,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 00:02:58,024 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:02:58,105 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:02:58,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2023-08-24 00:02:58,220 INFO L124 PetriNetUnfolderBase]: 21/144 cut-off events. [2023-08-24 00:02:58,221 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:02:58,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 144 events. 21/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 343 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 72. Up to 6 conditions per place. [2023-08-24 00:02:58,228 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 105 transitions, 218 flow [2023-08-24 00:02:58,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 100 transitions, 205 flow [2023-08-24 00:02:58,237 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:02:58,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 100 transitions, 205 flow [2023-08-24 00:02:58,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 100 transitions, 205 flow [2023-08-24 00:02:58,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 100 transitions, 205 flow [2023-08-24 00:02:58,300 INFO L124 PetriNetUnfolderBase]: 20/139 cut-off events. [2023-08-24 00:02:58,301 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:02:58,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 139 events. 20/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 339 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 72. Up to 6 conditions per place. [2023-08-24 00:02:58,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-08-24 00:03:00,855 INFO L134 LiptonReduction]: Checked pairs total: 3938 [2023-08-24 00:03:00,856 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-24 00:03:00,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:03:00,888 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;@28cae75b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:03:00,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:03:00,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:03:00,903 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2023-08-24 00:03:00,903 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:03:00,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:00,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:03:00,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:00,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash 392114195, now seen corresponding path program 1 times [2023-08-24 00:03:00,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:00,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493332475] [2023-08-24 00:03:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:00,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:01,167 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 00:03:01,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:01,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493332475] [2023-08-24 00:03:01,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493332475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:03:01,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:03:01,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:03:01,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252892806] [2023-08-24 00:03:01,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:03:01,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:03:01,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:03:01,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:03:01,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 187 [2023-08-24 00:03:01,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 34 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 00:03:01,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:01,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 187 [2023-08-24 00:03:01,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:01,269 INFO L124 PetriNetUnfolderBase]: 89/209 cut-off events. [2023-08-24 00:03:01,269 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:03:01,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 209 events. 89/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 842 event pairs, 0 based on Foata normal form. 20/193 useless extension candidates. Maximal degree in co-relation 384. Up to 180 conditions per place. [2023-08-24 00:03:01,272 INFO L140 encePairwiseOnDemand]: 175/187 looper letters, 23 selfloop transitions, 2 changer transitions 5/33 dead transitions. [2023-08-24 00:03:01,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 131 flow [2023-08-24 00:03:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:03:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:03:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-08-24 00:03:01,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204991087344029 [2023-08-24 00:03:01,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-08-24 00:03:01,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-08-24 00:03:01,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:01,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-08-24 00:03:01,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 00:03:01,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 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 00:03:01,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 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 00:03:01,298 INFO L175 Difference]: Start difference. First operand has 27 places, 34 transitions, 73 flow. Second operand 3 states and 292 transitions. [2023-08-24 00:03:01,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 131 flow [2023-08-24 00:03:01,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 131 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:03:01,302 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-08-24 00:03:01,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-24 00:03:01,307 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-24 00:03:01,307 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-08-24 00:03:01,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 00:03:01,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:01,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 00:03:01,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:03:01,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:01,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash -711926246, now seen corresponding path program 1 times [2023-08-24 00:03:01,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:01,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242817878] [2023-08-24 00:03:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:01,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:01,334 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:03:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:01,363 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:03:01,364 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:03:01,365 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:03:01,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:03:01,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:03:01,367 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 00:03:01,369 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:03:01,369 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:03:01,385 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:03:01,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 135 transitions, 288 flow [2023-08-24 00:03:01,422 INFO L124 PetriNetUnfolderBase]: 37/238 cut-off events. [2023-08-24 00:03:01,422 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:03:01,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 238 events. 37/238 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 698 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 146. Up to 9 conditions per place. [2023-08-24 00:03:01,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 135 transitions, 288 flow [2023-08-24 00:03:01,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 135 transitions, 288 flow [2023-08-24 00:03:01,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:03:01,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 135 transitions, 288 flow [2023-08-24 00:03:01,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 135 transitions, 288 flow [2023-08-24 00:03:01,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 135 transitions, 288 flow [2023-08-24 00:03:01,456 INFO L124 PetriNetUnfolderBase]: 37/238 cut-off events. [2023-08-24 00:03:01,456 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:03:01,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 238 events. 37/238 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 698 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 146. Up to 9 conditions per place. [2023-08-24 00:03:01,465 INFO L119 LiptonReduction]: Number of co-enabled transitions 7224 [2023-08-24 00:03:03,690 INFO L134 LiptonReduction]: Checked pairs total: 16681 [2023-08-24 00:03:03,691 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-24 00:03:03,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:03:03,694 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;@28cae75b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:03:03,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:03:03,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:03:03,697 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2023-08-24 00:03:03,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:03:03,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:03,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:03:03,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:03,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash 639192205, now seen corresponding path program 1 times [2023-08-24 00:03:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:03,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726618176] [2023-08-24 00:03:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:03,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:03,770 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 00:03:03,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726618176] [2023-08-24 00:03:03,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726618176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:03:03,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:03:03,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:03:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914204194] [2023-08-24 00:03:03,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:03:03,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:03:03,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:03:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:03:03,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 229 [2023-08-24 00:03:03,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 00:03:03,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:03,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 229 [2023-08-24 00:03:03,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:04,090 INFO L124 PetriNetUnfolderBase]: 1665/2906 cut-off events. [2023-08-24 00:03:04,091 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-24 00:03:04,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5646 conditions, 2906 events. 1665/2906 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 17013 event pairs, 736 based on Foata normal form. 442/2985 useless extension candidates. Maximal degree in co-relation 659. Up to 2666 conditions per place. [2023-08-24 00:03:04,107 INFO L140 encePairwiseOnDemand]: 211/229 looper letters, 32 selfloop transitions, 2 changer transitions 9/52 dead transitions. [2023-08-24 00:03:04,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 206 flow [2023-08-24 00:03:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:03:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:03:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-24 00:03:04,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473071324599709 [2023-08-24 00:03:04,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-24 00:03:04,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-24 00:03:04,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:04,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-24 00:03:04,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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 00:03:04,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 00:03:04,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 00:03:04,119 INFO L175 Difference]: Start difference. First operand has 46 places, 59 transitions, 136 flow. Second operand 3 states and 376 transitions. [2023-08-24 00:03:04,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 206 flow [2023-08-24 00:03:04,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:03:04,124 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 92 flow [2023-08-24 00:03:04,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-24 00:03:04,125 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-24 00:03:04,125 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 92 flow [2023-08-24 00:03:04,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 00:03:04,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:04,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:03:04,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 00:03:04,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:04,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash 463317776, now seen corresponding path program 1 times [2023-08-24 00:03:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:04,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193580165] [2023-08-24 00:03:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:04,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:04,227 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 00:03:04,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193580165] [2023-08-24 00:03:04,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193580165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:03:04,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061813478] [2023-08-24 00:03:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:04,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:03:04,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:03:04,237 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 00:03:04,276 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 00:03:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:04,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:03:04,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:03:04,400 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 00:03:04,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:03:04,442 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 00:03:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061813478] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:03:04,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:03:04,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:03:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458040921] [2023-08-24 00:03:04,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:03:04,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:03:04,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:03:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:03:04,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 229 [2023-08-24 00:03:04,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 92 flow. Second operand has 7 states, 7 states have (on average 106.42857142857143) internal successors, (745), 7 states have internal predecessors, (745), 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 00:03:04,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:04,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 229 [2023-08-24 00:03:04,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:04,590 INFO L124 PetriNetUnfolderBase]: 331/671 cut-off events. [2023-08-24 00:03:04,590 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-08-24 00:03:04,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 671 events. 331/671 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3364 event pairs, 50 based on Foata normal form. 80/748 useless extension candidates. Maximal degree in co-relation 1067. Up to 398 conditions per place. [2023-08-24 00:03:04,595 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-24 00:03:04,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 218 flow [2023-08-24 00:03:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:03:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:03:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-08-24 00:03:04,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49519650655021835 [2023-08-24 00:03:04,598 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-08-24 00:03:04,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-08-24 00:03:04,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:04,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-08-24 00:03:04,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 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 00:03:04,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 00:03:04,603 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 00:03:04,603 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 92 flow. Second operand 5 states and 567 transitions. [2023-08-24 00:03:04,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 218 flow [2023-08-24 00:03:04,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:03:04,609 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-24 00:03:04,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, 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 00:03:04,611 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2023-08-24 00:03:04,612 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-24 00:03:04,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.42857142857143) internal successors, (745), 7 states have internal predecessors, (745), 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 00:03:04,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:04,612 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 00:03:04,626 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 00:03:04,827 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 00:03:04,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:04,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:04,828 INFO L85 PathProgramCache]: Analyzing trace with hash -620810740, now seen corresponding path program 1 times [2023-08-24 00:03:04,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158346038] [2023-08-24 00:03:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:04,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:04,844 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:03:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:04,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:03:04,858 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:03:04,858 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:03:04,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:03:04,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:03:04,859 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:03:04,859 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:03:04,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:03:04,879 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:03:04,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 165 transitions, 360 flow [2023-08-24 00:03:04,932 INFO L124 PetriNetUnfolderBase]: 58/365 cut-off events. [2023-08-24 00:03:04,932 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:03:04,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 365 events. 58/365 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1192 event pairs, 1 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 246. Up to 16 conditions per place. [2023-08-24 00:03:04,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 165 transitions, 360 flow [2023-08-24 00:03:04,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 165 transitions, 360 flow [2023-08-24 00:03:04,939 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:03:04,940 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 165 transitions, 360 flow [2023-08-24 00:03:04,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 165 transitions, 360 flow [2023-08-24 00:03:04,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 165 transitions, 360 flow [2023-08-24 00:03:04,973 INFO L124 PetriNetUnfolderBase]: 58/365 cut-off events. [2023-08-24 00:03:04,973 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:03:04,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 365 events. 58/365 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1192 event pairs, 1 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 246. Up to 16 conditions per place. [2023-08-24 00:03:04,987 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2023-08-24 00:03:07,268 INFO L134 LiptonReduction]: Checked pairs total: 33476 [2023-08-24 00:03:07,269 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-24 00:03:07,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:03:07,272 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;@28cae75b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:03:07,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:03:07,274 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:03:07,274 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-24 00:03:07,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:03:07,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:07,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:03:07,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:07,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash 930075122, now seen corresponding path program 1 times [2023-08-24 00:03:07,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:07,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347851567] [2023-08-24 00:03:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:07,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:07,302 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 00:03:07,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:07,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347851567] [2023-08-24 00:03:07,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347851567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:03:07,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:03:07,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:03:07,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160199663] [2023-08-24 00:03:07,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:03:07,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:03:07,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:03:07,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:03:07,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 275 [2023-08-24 00:03:07,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 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 00:03:07,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:07,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 275 [2023-08-24 00:03:07,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:10,123 INFO L124 PetriNetUnfolderBase]: 21048/31609 cut-off events. [2023-08-24 00:03:10,123 INFO L125 PetriNetUnfolderBase]: For 867/867 co-relation queries the response was YES. [2023-08-24 00:03:10,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61868 conditions, 31609 events. 21048/31609 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 219441 event pairs, 19361 based on Foata normal form. 5728/33793 useless extension candidates. Maximal degree in co-relation 23156. Up to 29586 conditions per place. [2023-08-24 00:03:10,303 INFO L140 encePairwiseOnDemand]: 252/275 looper letters, 41 selfloop transitions, 2 changer transitions 10/66 dead transitions. [2023-08-24 00:03:10,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 66 transitions, 266 flow [2023-08-24 00:03:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:03:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:03:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-24 00:03:10,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553939393939394 [2023-08-24 00:03:10,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-24 00:03:10,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-24 00:03:10,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:10,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-24 00:03:10,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 00:03:10,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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 00:03:10,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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 00:03:10,309 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 182 flow. Second operand 3 states and 457 transitions. [2023-08-24 00:03:10,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 66 transitions, 266 flow [2023-08-24 00:03:10,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:03:10,313 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 125 flow [2023-08-24 00:03:10,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-24 00:03:10,314 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-24 00:03:10,314 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 125 flow [2023-08-24 00:03:10,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 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 00:03:10,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:10,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:03:10,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:03:10,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:10,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash 909886903, now seen corresponding path program 1 times [2023-08-24 00:03:10,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:10,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122021968] [2023-08-24 00:03:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:10,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:10,433 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 00:03:10,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:10,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122021968] [2023-08-24 00:03:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122021968] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:03:10,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561733385] [2023-08-24 00:03:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:10,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:03:10,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:03:10,435 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 00:03:10,467 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 00:03:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:10,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:03:10,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:03:10,535 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 00:03:10,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:03:10,558 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 00:03:10,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561733385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:03:10,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:03:10,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:03:10,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781150753] [2023-08-24 00:03:10,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:03:10,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:03:10,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:10,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:03:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:03:10,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 275 [2023-08-24 00:03:10,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 125 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 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 00:03:10,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:10,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 275 [2023-08-24 00:03:10,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:11,254 INFO L124 PetriNetUnfolderBase]: 4372/7519 cut-off events. [2023-08-24 00:03:11,254 INFO L125 PetriNetUnfolderBase]: For 2691/2691 co-relation queries the response was YES. [2023-08-24 00:03:11,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16349 conditions, 7519 events. 4372/7519 cut-off events. For 2691/2691 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 51904 event pairs, 324 based on Foata normal form. 657/8013 useless extension candidates. Maximal degree in co-relation 1859. Up to 4122 conditions per place. [2023-08-24 00:03:11,305 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 75 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-08-24 00:03:11,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 92 transitions, 373 flow [2023-08-24 00:03:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:03:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:03:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 838 transitions. [2023-08-24 00:03:11,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078787878787879 [2023-08-24 00:03:11,309 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 838 transitions. [2023-08-24 00:03:11,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 838 transitions. [2023-08-24 00:03:11,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:11,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 838 transitions. [2023-08-24 00:03:11,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.66666666666666) internal successors, (838), 6 states have internal predecessors, (838), 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 00:03:11,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 275.0) internal successors, (1925), 7 states have internal predecessors, (1925), 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 00:03:11,315 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 275.0) internal successors, (1925), 7 states have internal predecessors, (1925), 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 00:03:11,315 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 125 flow. Second operand 6 states and 838 transitions. [2023-08-24 00:03:11,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 92 transitions, 373 flow [2023-08-24 00:03:11,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 92 transitions, 365 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 00:03:11,322 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-24 00:03:11,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, 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 00:03:11,323 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-08-24 00:03:11,323 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-24 00:03:11,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 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 00:03:11,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:11,324 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 00:03:11,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 00:03:11,529 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 00:03:11,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:11,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash 475195895, now seen corresponding path program 1 times [2023-08-24 00:03:11,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:11,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624748657] [2023-08-24 00:03:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:11,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:11,549 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:03:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:11,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:03:11,568 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:03:11,568 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:03:11,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:03:11,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 00:03:11,569 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:03:11,570 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:03:11,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:03:11,602 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:03:11,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 195 transitions, 434 flow [2023-08-24 00:03:11,663 INFO L124 PetriNetUnfolderBase]: 91/560 cut-off events. [2023-08-24 00:03:11,663 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:03:11,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 560 events. 91/560 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2109 event pairs, 6 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 385. Up to 32 conditions per place. [2023-08-24 00:03:11,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 195 transitions, 434 flow [2023-08-24 00:03:11,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 195 transitions, 434 flow [2023-08-24 00:03:11,674 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:03:11,674 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 195 transitions, 434 flow [2023-08-24 00:03:11,674 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 195 transitions, 434 flow [2023-08-24 00:03:11,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 195 transitions, 434 flow [2023-08-24 00:03:11,727 INFO L124 PetriNetUnfolderBase]: 91/560 cut-off events. [2023-08-24 00:03:11,727 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:03:11,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 560 events. 91/560 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2109 event pairs, 6 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 385. Up to 32 conditions per place. [2023-08-24 00:03:11,752 INFO L119 LiptonReduction]: Number of co-enabled transitions 21392 [2023-08-24 00:03:14,272 INFO L134 LiptonReduction]: Checked pairs total: 58069 [2023-08-24 00:03:14,273 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-24 00:03:14,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:03:14,275 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;@28cae75b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:03:14,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:03:14,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:03:14,278 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-24 00:03:14,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:03:14,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:14,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:03:14,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:14,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1264051709, now seen corresponding path program 1 times [2023-08-24 00:03:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:14,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530384330] [2023-08-24 00:03:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:14,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:14,326 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 00:03:14,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:14,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530384330] [2023-08-24 00:03:14,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530384330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:03:14,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:03:14,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:03:14,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871083009] [2023-08-24 00:03:14,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:03:14,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:03:14,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:03:14,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:03:14,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 320 [2023-08-24 00:03:14,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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 00:03:14,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:14,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 320 [2023-08-24 00:03:14,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:42,813 INFO L124 PetriNetUnfolderBase]: 298317/406647 cut-off events. [2023-08-24 00:03:42,814 INFO L125 PetriNetUnfolderBase]: For 14764/14764 co-relation queries the response was YES. [2023-08-24 00:03:43,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802310 conditions, 406647 events. 298317/406647 cut-off events. For 14764/14764 co-relation queries the response was YES. Maximal size of possible extension queue 8345. Compared 3052942 event pairs, 214660 based on Foata normal form. 65452/440574 useless extension candidates. Maximal degree in co-relation 69542. Up to 387526 conditions per place. [2023-08-24 00:03:45,059 INFO L140 encePairwiseOnDemand]: 291/320 looper letters, 51 selfloop transitions, 2 changer transitions 11/79 dead transitions. [2023-08-24 00:03:45,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-08-24 00:03:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:03:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:03:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-24 00:03:45,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-08-24 00:03:45,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-24 00:03:45,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-24 00:03:45,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:45,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-24 00:03:45,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 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 00:03:45,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 00:03:45,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 00:03:45,066 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 540 transitions. [2023-08-24 00:03:45,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-08-24 00:03:45,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:03:45,073 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 160 flow [2023-08-24 00:03:45,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2023-08-24 00:03:45,075 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-24 00:03:45,075 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 160 flow [2023-08-24 00:03:45,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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 00:03:45,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:45,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:03:45,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 00:03:45,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:45,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash 217611314, now seen corresponding path program 1 times [2023-08-24 00:03:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:45,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398411789] [2023-08-24 00:03:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:45,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:45,121 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 00:03:45,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:03:45,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398411789] [2023-08-24 00:03:45,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398411789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:03:45,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691503044] [2023-08-24 00:03:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:45,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:03:45,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:03:45,125 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 00:03:45,128 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 00:03:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:03:45,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:03:45,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:03:45,219 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 00:03:45,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:03:45,240 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 00:03:45,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691503044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:03:45,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:03:45,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:03:45,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256801817] [2023-08-24 00:03:45,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:03:45,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:03:45,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:03:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:03:45,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:03:45,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 320 [2023-08-24 00:03:45,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 150.42857142857142) internal successors, (1053), 7 states have internal predecessors, (1053), 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 00:03:45,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:03:45,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 320 [2023-08-24 00:03:45,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:03:57,069 INFO L124 PetriNetUnfolderBase]: 150148/202570 cut-off events. [2023-08-24 00:03:57,069 INFO L125 PetriNetUnfolderBase]: For 22986/22986 co-relation queries the response was YES. [2023-08-24 00:03:57,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416883 conditions, 202570 events. 150148/202570 cut-off events. For 22986/22986 co-relation queries the response was YES. Maximal size of possible extension queue 4695. Compared 1412710 event pairs, 18792 based on Foata normal form. 729/197466 useless extension candidates. Maximal degree in co-relation 47375. Up to 138268 conditions per place. [2023-08-24 00:03:58,499 INFO L140 encePairwiseOnDemand]: 316/320 looper letters, 121 selfloop transitions, 6 changer transitions 0/142 dead transitions. [2023-08-24 00:03:58,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 142 transitions, 584 flow [2023-08-24 00:03:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:03:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:03:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1018 transitions. [2023-08-24 00:03:58,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302083333333333 [2023-08-24 00:03:58,503 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1018 transitions. [2023-08-24 00:03:58,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1018 transitions. [2023-08-24 00:03:58,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:03:58,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1018 transitions. [2023-08-24 00:03:58,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 169.66666666666666) internal successors, (1018), 6 states have internal predecessors, (1018), 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 00:03:58,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 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 00:03:58,510 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 320.0) internal successors, (2240), 7 states have internal predecessors, (2240), 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 00:03:58,510 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 160 flow. Second operand 6 states and 1018 transitions. [2023-08-24 00:03:58,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 142 transitions, 584 flow [2023-08-24 00:03:58,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 142 transitions, 570 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:03:58,531 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 186 flow [2023-08-24 00:03:58,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-08-24 00:03:58,532 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2023-08-24 00:03:58,532 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 186 flow [2023-08-24 00:03:58,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.42857142857142) internal successors, (1053), 7 states have internal predecessors, (1053), 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 00:03:58,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:03:58,533 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 00:03:58,538 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 00:03:58,734 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 00:03:58,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:03:58,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:03:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash -291426418, now seen corresponding path program 1 times [2023-08-24 00:03:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:03:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527709077] [2023-08-24 00:03:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:03:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:03:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:58,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:03:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:03:58,787 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:03:58,787 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:03:58,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:03:58,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:03:58,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:03:58,788 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:03:58,788 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:03:58,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 00:03:58,822 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 00:03:58,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 225 transitions, 510 flow [2023-08-24 00:03:58,930 INFO L124 PetriNetUnfolderBase]: 152/895 cut-off events. [2023-08-24 00:03:58,930 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 00:03:58,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 895 events. 152/895 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4014 event pairs, 23 based on Foata normal form. 0/753 useless extension candidates. Maximal degree in co-relation 605. Up to 80 conditions per place. [2023-08-24 00:03:58,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 225 transitions, 510 flow [2023-08-24 00:03:58,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 225 transitions, 510 flow [2023-08-24 00:03:58,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:03:58,949 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 225 transitions, 510 flow [2023-08-24 00:03:58,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 225 transitions, 510 flow [2023-08-24 00:03:58,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 225 transitions, 510 flow [2023-08-24 00:03:59,017 INFO L124 PetriNetUnfolderBase]: 152/895 cut-off events. [2023-08-24 00:03:59,017 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 00:03:59,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 895 events. 152/895 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4014 event pairs, 23 based on Foata normal form. 0/753 useless extension candidates. Maximal degree in co-relation 605. Up to 80 conditions per place. [2023-08-24 00:03:59,053 INFO L119 LiptonReduction]: Number of co-enabled transitions 31080 [2023-08-24 00:04:01,353 INFO L134 LiptonReduction]: Checked pairs total: 85036 [2023-08-24 00:04:01,353 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-24 00:04:01,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:04:01,355 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;@28cae75b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:04:01,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:04:01,356 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:04:01,356 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-24 00:04:01,356 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:01,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:01,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 00:04:01,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:01,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1640585607, now seen corresponding path program 1 times [2023-08-24 00:04:01,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:01,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854324948] [2023-08-24 00:04:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:01,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:04:01,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:01,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854324948] [2023-08-24 00:04:01,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854324948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:01,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:01,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:04:01,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481868785] [2023-08-24 00:04:01,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:01,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:01,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:01,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:01,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:01,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 365 [2023-08-24 00:04:01,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:01,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:01,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 365 [2023-08-24 00:04:01,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand