/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_81-list_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:14:47,836 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:14:47,904 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 00:14:47,908 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:14:47,909 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:14:47,942 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:14:47,943 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:14:47,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:14:47,944 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:14:47,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:14:47,948 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:14:47,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:14:47,949 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:14:47,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:14:47,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:14:47,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:14:47,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:14:47,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:14:47,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:14:47,951 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:14:47,951 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:14:47,952 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:14:47,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:14:47,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:14:47,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:14:47,954 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:14:47,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:14:47,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:14:47,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:14:47,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:14:47,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:14:47,956 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:14:47,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:14:47,956 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:14:47,956 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:14:47,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:14:48,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:14:48,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:14:48,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:14:48,309 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:14:48,310 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:14:48,311 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-24 00:14:49,540 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:14:49,847 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:14:49,847 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-24 00:14:49,869 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e0c5aed3/05135830457e4b8aa523e2fc147e11e2/FLAGd00229e74 [2023-08-24 00:14:50,124 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e0c5aed3/05135830457e4b8aa523e2fc147e11e2 [2023-08-24 00:14:50,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:14:50,127 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:14:50,129 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:14:50,129 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:14:50,131 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:14:50,132 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28405692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50, skipping insertion in model container [2023-08-24 00:14:50,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,187 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:14:50,665 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_81-list_racing.i[47038,47051] [2023-08-24 00:14:50,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:14:50,733 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:14:50,759 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 00:14:50,760 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-24 00:14:50,773 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_81-list_racing.i[47038,47051] [2023-08-24 00:14:50,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:14:50,853 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:14:50,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50 WrapperNode [2023-08-24 00:14:50,854 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:14:50,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:14:50,856 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:14:50,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:14:50,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,882 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,909 INFO L138 Inliner]: procedures = 278, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 210 [2023-08-24 00:14:50,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:14:50,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:14:50,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:14:50,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:14:50,923 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,941 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,950 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,968 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,970 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,972 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,975 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:14:50,976 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:14:50,976 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:14:50,976 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:14:50,977 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (1/1) ... [2023-08-24 00:14:50,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:14:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:14:51,018 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 00:14:51,045 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 00:14:51,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:14:51,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-24 00:14:51,057 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-24 00:14:51,057 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-24 00:14:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:14:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:14:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-24 00:14:51,058 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-24 00:14:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:14:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:14:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 00:14:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:14:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-24 00:14:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:14:51,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:14:51,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:14:51,062 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 00:14:51,249 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:14:51,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:14:51,633 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:14:51,640 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:14:51,640 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-24 00:14:51,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:14:51 BoogieIcfgContainer [2023-08-24 00:14:51,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:14:51,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:14:51,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:14:51,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:14:51,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:14:50" (1/3) ... [2023-08-24 00:14:51,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc06615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:14:51, skipping insertion in model container [2023-08-24 00:14:51,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:14:50" (2/3) ... [2023-08-24 00:14:51,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc06615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:14:51, skipping insertion in model container [2023-08-24 00:14:51,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:14:51" (3/3) ... [2023-08-24 00:14:51,649 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_81-list_racing.i [2023-08-24 00:14:51,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:14:51,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 00:14:51,666 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:14:51,778 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:14:51,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 213 transitions, 448 flow [2023-08-24 00:14:51,960 INFO L124 PetriNetUnfolderBase]: 52/412 cut-off events. [2023-08-24 00:14:51,960 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-24 00:14:51,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 412 events. 52/412 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1686 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2023-08-24 00:14:51,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 213 transitions, 448 flow [2023-08-24 00:14:51,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 211 transitions, 438 flow [2023-08-24 00:14:51,977 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:14:51,985 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 211 transitions, 438 flow [2023-08-24 00:14:51,988 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 211 transitions, 438 flow [2023-08-24 00:14:51,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 211 transitions, 438 flow [2023-08-24 00:14:52,039 INFO L124 PetriNetUnfolderBase]: 48/400 cut-off events. [2023-08-24 00:14:52,040 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-08-24 00:14:52,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 400 events. 48/400 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1590 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 200. Up to 8 conditions per place. [2023-08-24 00:14:52,054 INFO L119 LiptonReduction]: Number of co-enabled transitions 13258 [2023-08-24 00:14:58,478 INFO L134 LiptonReduction]: Checked pairs total: 23216 [2023-08-24 00:14:58,478 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-08-24 00:14:58,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:14:58,495 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;@65f396c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:14:58,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 00:14:58,501 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:14:58,501 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-24 00:14:58,501 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:14:58,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:14:58,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 00:14:58,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 00:14:58,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:14:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1183800088, now seen corresponding path program 1 times [2023-08-24 00:14:58,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:14:58,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280864191] [2023-08-24 00:14:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:14:58,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:14:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:14:58,644 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:14:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:14:58,699 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:14:58,701 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:14:58,702 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-24 00:14:58,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-24 00:14:58,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 00:14:58,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-24 00:14:58,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:14:58,704 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 00:14:58,707 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:14:58,707 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:14:58,760 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-24 00:14:58,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-24 00:14:58,977 INFO L124 PetriNetUnfolderBase]: 191/1223 cut-off events. [2023-08-24 00:14:58,977 INFO L125 PetriNetUnfolderBase]: For 72/90 co-relation queries the response was YES. [2023-08-24 00:14:59,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 1223 events. 191/1223 cut-off events. For 72/90 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7634 event pairs, 2 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 769. Up to 32 conditions per place. [2023-08-24 00:14:59,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 327 transitions, 702 flow [2023-08-24 00:14:59,013 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 327 transitions, 702 flow [2023-08-24 00:14:59,014 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:14:59,014 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-24 00:14:59,014 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 327 transitions, 702 flow [2023-08-24 00:14:59,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 327 transitions, 702 flow [2023-08-24 00:14:59,239 INFO L124 PetriNetUnfolderBase]: 191/1223 cut-off events. [2023-08-24 00:14:59,240 INFO L125 PetriNetUnfolderBase]: For 72/90 co-relation queries the response was YES. [2023-08-24 00:14:59,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 1223 events. 191/1223 cut-off events. For 72/90 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7634 event pairs, 2 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 769. Up to 32 conditions per place. [2023-08-24 00:14:59,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 52800 [2023-08-24 00:15:06,809 INFO L134 LiptonReduction]: Checked pairs total: 105005 [2023-08-24 00:15:06,809 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-24 00:15:06,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:15:06,812 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;@65f396c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:15:06,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 00:15:06,820 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:15:06,820 INFO L124 PetriNetUnfolderBase]: 5/62 cut-off events. [2023-08-24 00:15:06,820 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 00:15:06,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:15:06,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:15:06,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 00:15:06,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:15:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash 934688734, now seen corresponding path program 1 times [2023-08-24 00:15:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:15:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533240174] [2023-08-24 00:15:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:15:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:15:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:15:07,021 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 00:15:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:15:07,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533240174] [2023-08-24 00:15:07,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533240174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:15:07,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:15:07,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:15:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513871039] [2023-08-24 00:15:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:15:07,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:15:07,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:15:07,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:15:07,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:15:07,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 582 [2023-08-24 00:15:07,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 112 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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 00:15:07,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:15:07,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 582 [2023-08-24 00:15:07,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:16:23,005 INFO L124 PetriNetUnfolderBase]: 783305/1048357 cut-off events. [2023-08-24 00:16:23,006 INFO L125 PetriNetUnfolderBase]: For 44920/44920 co-relation queries the response was YES. [2023-08-24 00:16:25,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056556 conditions, 1048357 events. 783305/1048357 cut-off events. For 44920/44920 co-relation queries the response was YES. Maximal size of possible extension queue 21058. Compared 8023069 event pairs, 546616 based on Foata normal form. 84048/984751 useless extension candidates. Maximal degree in co-relation 324969. Up to 987090 conditions per place. [2023-08-24 00:16:28,009 INFO L140 encePairwiseOnDemand]: 557/582 looper letters, 81 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-24 00:16:28,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 99 transitions, 412 flow [2023-08-24 00:16:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:16:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:16:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 937 transitions. [2023-08-24 00:16:28,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366552119129439 [2023-08-24 00:16:28,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 937 transitions. [2023-08-24 00:16:28,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 937 transitions. [2023-08-24 00:16:28,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:16:28,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 937 transitions. [2023-08-24 00:16:28,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 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 00:16:28,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 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 00:16:28,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 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 00:16:28,045 INFO L175 Difference]: Start difference. First operand has 87 places, 112 transitions, 272 flow. Second operand 3 states and 937 transitions. [2023-08-24 00:16:28,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 99 transitions, 412 flow [2023-08-24 00:16:28,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 99 transitions, 412 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:16:28,066 INFO L231 Difference]: Finished difference. Result has 90 places, 91 transitions, 240 flow [2023-08-24 00:16:28,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=90, PETRI_TRANSITIONS=91} [2023-08-24 00:16:28,070 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-24 00:16:28,071 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 91 transitions, 240 flow [2023-08-24 00:16:28,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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 00:16:28,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:16:28,072 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 00:16:28,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:16:28,072 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 00:16:28,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:16:28,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1448288642, now seen corresponding path program 1 times [2023-08-24 00:16:28,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:16:28,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768525000] [2023-08-24 00:16:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:16:28,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:16:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:16:28,097 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:16:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:16:28,118 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:16:28,118 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:16:28,119 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-24 00:16:28,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 00:16:28,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-24 00:16:28,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 00:16:28,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 00:16:28,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 00:16:28,120 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 00:16:28,120 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:16:28,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:16:28,173 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-24 00:16:28,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 393 places, 441 transitions, 960 flow [2023-08-24 00:16:28,946 INFO L124 PetriNetUnfolderBase]: 664/3432 cut-off events. [2023-08-24 00:16:28,947 INFO L125 PetriNetUnfolderBase]: For 419/453 co-relation queries the response was YES. [2023-08-24 00:16:28,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3883 conditions, 3432 events. 664/3432 cut-off events. For 419/453 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 26427 event pairs, 64 based on Foata normal form. 0/2944 useless extension candidates. Maximal degree in co-relation 2232. Up to 192 conditions per place. [2023-08-24 00:16:28,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 393 places, 441 transitions, 960 flow [2023-08-24 00:16:29,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 393 places, 441 transitions, 960 flow [2023-08-24 00:16:29,017 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:16:29,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 393 places, 441 transitions, 960 flow [2023-08-24 00:16:29,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 393 places, 441 transitions, 960 flow [2023-08-24 00:16:29,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 393 places, 441 transitions, 960 flow [2023-08-24 00:16:29,519 INFO L124 PetriNetUnfolderBase]: 664/3432 cut-off events. [2023-08-24 00:16:29,519 INFO L125 PetriNetUnfolderBase]: For 419/453 co-relation queries the response was YES. [2023-08-24 00:16:29,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3883 conditions, 3432 events. 664/3432 cut-off events. For 419/453 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 26427 event pairs, 64 based on Foata normal form. 0/2944 useless extension candidates. Maximal degree in co-relation 2232. Up to 192 conditions per place. [2023-08-24 00:16:29,791 INFO L119 LiptonReduction]: Number of co-enabled transitions 117246 [2023-08-24 00:16:37,986 INFO L134 LiptonReduction]: Checked pairs total: 237360 [2023-08-24 00:16:37,986 INFO L136 LiptonReduction]: Total number of compositions: 334 [2023-08-24 00:16:37,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:16:37,989 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;@65f396c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:16:37,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-24 00:16:37,994 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:16:37,994 INFO L124 PetriNetUnfolderBase]: 5/59 cut-off events. [2023-08-24 00:16:37,994 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 00:16:37,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:16:37,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:16:37,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-24 00:16:37,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:16:37,995 INFO L85 PathProgramCache]: Analyzing trace with hash -666349707, now seen corresponding path program 1 times [2023-08-24 00:16:37,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:16:37,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587694901] [2023-08-24 00:16:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:16:37,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:16:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:16:38,039 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 00:16:38,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:16:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587694901] [2023-08-24 00:16:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587694901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:16:38,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:16:38,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:16:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060519661] [2023-08-24 00:16:38,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:16:38,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:16:38,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:16:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:16:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:16:38,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 775 [2023-08-24 00:16:38,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 159 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 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 00:16:38,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:16:38,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 775 [2023-08-24 00:16:38,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand