/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_51-mutexptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 00:04:06,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 00:04:06,600 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 00:04:06,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 00:04:06,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 00:04:06,637 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 00:04:06,638 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 00:04:06,638 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 00:04:06,639 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 00:04:06,643 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 00:04:06,644 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 00:04:06,644 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 00:04:06,644 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 00:04:06,645 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 00:04:06,646 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 00:04:06,646 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 00:04:06,646 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 00:04:06,646 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 00:04:06,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 00:04:06,646 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 00:04:06,646 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 00:04:06,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 00:04:06,647 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 00:04:06,648 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 00:04:06,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 00:04:06,648 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 00:04:06,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 00:04:06,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:04:06,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 00:04:06,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 00:04:06,650 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 00:04:06,650 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 00:04:06,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 00:04:06,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 00:04:06,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 00:04:06,651 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 00:04:06,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 00:04:06,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 00:04:06,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 00:04:06,991 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 00:04:06,992 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 00:04:06,993 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-24 00:04:08,309 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 00:04:08,577 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 00:04:08,577 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-24 00:04:08,596 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31be43616/7f1f0e7a4b474dc8a72ddc39c8127dad/FLAG793524996 [2023-08-24 00:04:08,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31be43616/7f1f0e7a4b474dc8a72ddc39c8127dad [2023-08-24 00:04:08,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 00:04:08,608 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 00:04:08,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 00:04:08,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 00:04:08,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 00:04:08,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71db622d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08, skipping insertion in model container [2023-08-24 00:04:08,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,640 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 00:04:08,804 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_51-mutexptr_racefree.i[30176,30189] [2023-08-24 00:04:08,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:04:08,823 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 00:04:08,835 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:04:08,836 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 00:04:08,845 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_51-mutexptr_racefree.i[30176,30189] [2023-08-24 00:04:08,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 00:04:08,887 INFO L206 MainTranslator]: Completed translation [2023-08-24 00:04:08,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08 WrapperNode [2023-08-24 00:04:08,887 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 00:04:08,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 00:04:08,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 00:04:08,889 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 00:04:08,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,918 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,940 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-08-24 00:04:08,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 00:04:08,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 00:04:08,941 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 00:04:08,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 00:04:08,947 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,965 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,967 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,972 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,973 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,983 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 00:04:08,984 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 00:04:08,984 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 00:04:08,984 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 00:04:08,985 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (1/1) ... [2023-08-24 00:04:08,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 00:04:08,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:04:09,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 00:04:09,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 00:04:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 00:04:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 00:04:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 00:04:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 00:04:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 00:04:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 00:04:09,038 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 00:04:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 00:04:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 00:04:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 00:04:09,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 00:04:09,039 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 00:04:09,177 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 00:04:09,179 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 00:04:09,372 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 00:04:09,378 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 00:04:09,378 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-24 00:04:09,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:04:09 BoogieIcfgContainer [2023-08-24 00:04:09,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 00:04:09,381 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 00:04:09,382 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 00:04:09,384 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 00:04:09,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:04:08" (1/3) ... [2023-08-24 00:04:09,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae19491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:04:09, skipping insertion in model container [2023-08-24 00:04:09,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:04:08" (2/3) ... [2023-08-24 00:04:09,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae19491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:04:09, skipping insertion in model container [2023-08-24 00:04:09,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:04:09" (3/3) ... [2023-08-24 00:04:09,386 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-08-24 00:04:09,398 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 00:04:09,398 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 00:04:09,398 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 00:04:09,433 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 00:04:09,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 125 transitions, 258 flow [2023-08-24 00:04:09,520 INFO L124 PetriNetUnfolderBase]: 17/163 cut-off events. [2023-08-24 00:04:09,520 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 00:04:09,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 163 events. 17/163 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 373 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-24 00:04:09,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 125 transitions, 258 flow [2023-08-24 00:04:09,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 120 transitions, 245 flow [2023-08-24 00:04:09,537 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:04:09,543 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 120 transitions, 245 flow [2023-08-24 00:04:09,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 120 transitions, 245 flow [2023-08-24 00:04:09,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 120 transitions, 245 flow [2023-08-24 00:04:09,568 INFO L124 PetriNetUnfolderBase]: 16/158 cut-off events. [2023-08-24 00:04:09,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:09,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 158 events. 16/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 357 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-24 00:04:09,571 INFO L119 LiptonReduction]: Number of co-enabled transitions 3080 [2023-08-24 00:04:12,368 INFO L134 LiptonReduction]: Checked pairs total: 5191 [2023-08-24 00:04:12,368 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-24 00:04:12,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:04:12,385 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;@1406abe9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:04:12,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:04:12,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:04:12,388 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-08-24 00:04:12,388 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:12,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:12,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:04:12,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:12,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:12,393 INFO L85 PathProgramCache]: Analyzing trace with hash 14484121, now seen corresponding path program 1 times [2023-08-24 00:04:12,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:12,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593593650] [2023-08-24 00:04:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:12,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:12,546 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 00:04:12,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:12,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593593650] [2023-08-24 00:04:12,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593593650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:12,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:12,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:04:12,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677378548] [2023-08-24 00:04:12,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:12,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:12,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:12,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-24 00:04:12,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 33 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 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 00:04:12,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:12,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-24 00:04:12,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:04:12,623 INFO L124 PetriNetUnfolderBase]: 72/186 cut-off events. [2023-08-24 00:04:12,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:12,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 186 events. 72/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 792 event pairs, 0 based on Foata normal form. 28/194 useless extension candidates. Maximal degree in co-relation 334. Up to 153 conditions per place. [2023-08-24 00:04:12,625 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 24 selfloop transitions, 2 changer transitions 4/33 dead transitions. [2023-08-24 00:04:12,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 129 flow [2023-08-24 00:04:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:04:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:04:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-24 00:04:12,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190058479532164 [2023-08-24 00:04:12,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-24 00:04:12,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-24 00:04:12,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:04:12,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-24 00:04:12,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 00:04:12,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 00:04:12,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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 00:04:12,648 INFO L175 Difference]: Start difference. First operand has 27 places, 33 transitions, 71 flow. Second operand 3 states and 355 transitions. [2023-08-24 00:04:12,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 129 flow [2023-08-24 00:04:12,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:04:12,652 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-08-24 00:04:12,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-24 00:04:12,655 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-24 00:04:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-08-24 00:04:12,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 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 00:04:12,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:12,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 00:04:12,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 00:04:12,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:12,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1014415402, now seen corresponding path program 1 times [2023-08-24 00:04:12,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:12,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753061712] [2023-08-24 00:04:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:12,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:12,676 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:04:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:12,701 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:04:12,701 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:04:12,702 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:04:12,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:04:12,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 00:04:12,704 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 00:04:12,706 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:04:12,706 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 00:04:12,720 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 00:04:12,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 162 transitions, 342 flow [2023-08-24 00:04:12,744 INFO L124 PetriNetUnfolderBase]: 31/263 cut-off events. [2023-08-24 00:04:12,744 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:04:12,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 263 events. 31/263 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 778 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-24 00:04:12,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 162 transitions, 342 flow [2023-08-24 00:04:12,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 162 transitions, 342 flow [2023-08-24 00:04:12,748 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:04:12,748 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 162 transitions, 342 flow [2023-08-24 00:04:12,748 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 162 transitions, 342 flow [2023-08-24 00:04:12,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 162 transitions, 342 flow [2023-08-24 00:04:12,767 INFO L124 PetriNetUnfolderBase]: 31/263 cut-off events. [2023-08-24 00:04:12,767 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 00:04:12,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 263 events. 31/263 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 778 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-24 00:04:12,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 9380 [2023-08-24 00:04:15,598 INFO L134 LiptonReduction]: Checked pairs total: 19310 [2023-08-24 00:04:15,598 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-24 00:04:15,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:04:15,600 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;@1406abe9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:04:15,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:04:15,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:04:15,602 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-08-24 00:04:15,603 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:15,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:15,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:04:15,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:15,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash 24544313, now seen corresponding path program 1 times [2023-08-24 00:04:15,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:15,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020032615] [2023-08-24 00:04:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:15,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:15,639 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 00:04:15,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:15,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020032615] [2023-08-24 00:04:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020032615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:15,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:15,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:04:15,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791658355] [2023-08-24 00:04:15,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:15,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:15,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:15,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:15,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 289 [2023-08-24 00:04:15,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:15,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:15,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 289 [2023-08-24 00:04:15,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:04:15,892 INFO L124 PetriNetUnfolderBase]: 1655/2904 cut-off events. [2023-08-24 00:04:15,892 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-24 00:04:15,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5676 conditions, 2904 events. 1655/2904 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 16775 event pairs, 765 based on Foata normal form. 398/2966 useless extension candidates. Maximal degree in co-relation 587. Up to 2690 conditions per place. [2023-08-24 00:04:15,901 INFO L140 encePairwiseOnDemand]: 271/289 looper letters, 33 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2023-08-24 00:04:15,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-24 00:04:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:04:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:04:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-24 00:04:15,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5305651672433679 [2023-08-24 00:04:15,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-24 00:04:15,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-24 00:04:15,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:04:15,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-24 00:04:15,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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 00:04:15,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 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 00:04:15,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 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 00:04:15,910 INFO L175 Difference]: Start difference. First operand has 44 places, 56 transitions, 130 flow. Second operand 3 states and 460 transitions. [2023-08-24 00:04:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-24 00:04:15,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:04:15,913 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2023-08-24 00:04:15,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-24 00:04:15,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-24 00:04:15,914 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2023-08-24 00:04:15,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:15,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:15,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:04:15,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 00:04:15,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:15,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:15,915 INFO L85 PathProgramCache]: Analyzing trace with hash 909837434, now seen corresponding path program 1 times [2023-08-24 00:04:15,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:15,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749341492] [2023-08-24 00:04:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:15,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:15,994 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 00:04:15,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:15,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749341492] [2023-08-24 00:04:15,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749341492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:04:15,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820695131] [2023-08-24 00:04:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:15,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:04:15,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:04:15,998 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 00:04:16,000 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 00:04:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:16,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:04:16,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:04:16,129 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 00:04:16,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:04:16,147 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 00:04:16,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820695131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:04:16,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:04:16,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:04:16,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265223002] [2023-08-24 00:04:16,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:04:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:04:16,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:04:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:04:16,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 289 [2023-08-24 00:04:16,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 134.28571428571428) internal successors, (940), 7 states have internal predecessors, (940), 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 00:04:16,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:16,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 289 [2023-08-24 00:04:16,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:04:16,245 INFO L124 PetriNetUnfolderBase]: 418/775 cut-off events. [2023-08-24 00:04:16,245 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-08-24 00:04:16,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1690 conditions, 775 events. 418/775 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3666 event pairs, 72 based on Foata normal form. 99/873 useless extension candidates. Maximal degree in co-relation 188. Up to 502 conditions per place. [2023-08-24 00:04:16,248 INFO L140 encePairwiseOnDemand]: 286/289 looper letters, 47 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-24 00:04:16,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 234 flow [2023-08-24 00:04:16,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 00:04:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 00:04:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 712 transitions. [2023-08-24 00:04:16,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49273356401384083 [2023-08-24 00:04:16,250 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 712 transitions. [2023-08-24 00:04:16,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 712 transitions. [2023-08-24 00:04:16,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:04:16,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 712 transitions. [2023-08-24 00:04:16,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.4) internal successors, (712), 5 states have internal predecessors, (712), 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 00:04:16,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 289.0) internal successors, (1734), 6 states have internal predecessors, (1734), 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 00:04:16,254 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 289.0) internal successors, (1734), 6 states have internal predecessors, (1734), 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 00:04:16,254 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 712 transitions. [2023-08-24 00:04:16,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 234 flow [2023-08-24 00:04:16,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 230 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 00:04:16,256 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-08-24 00:04:16,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, 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 00:04:16,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-08-24 00:04:16,257 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-08-24 00:04:16,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 134.28571428571428) internal successors, (940), 7 states have internal predecessors, (940), 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 00:04:16,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:16,258 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 00:04:16,266 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 00:04:16,463 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 00:04:16,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:16,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1180882590, now seen corresponding path program 1 times [2023-08-24 00:04:16,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:16,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354385940] [2023-08-24 00:04:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:16,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:16,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:04:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:16,488 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:04:16,489 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:04:16,489 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:04:16,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:04:16,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 00:04:16,489 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:04:16,490 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:04:16,490 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 00:04:16,520 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 00:04:16,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 428 flow [2023-08-24 00:04:16,560 INFO L124 PetriNetUnfolderBase]: 50/396 cut-off events. [2023-08-24 00:04:16,561 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:04:16,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 396 events. 50/396 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1347 event pairs, 1 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 271. Up to 16 conditions per place. [2023-08-24 00:04:16,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 199 transitions, 428 flow [2023-08-24 00:04:16,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 199 transitions, 428 flow [2023-08-24 00:04:16,572 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:04:16,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 199 transitions, 428 flow [2023-08-24 00:04:16,572 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 199 transitions, 428 flow [2023-08-24 00:04:16,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 199 transitions, 428 flow [2023-08-24 00:04:16,600 INFO L124 PetriNetUnfolderBase]: 50/396 cut-off events. [2023-08-24 00:04:16,600 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 00:04:16,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 396 events. 50/396 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1347 event pairs, 1 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 271. Up to 16 conditions per place. [2023-08-24 00:04:16,614 INFO L119 LiptonReduction]: Number of co-enabled transitions 18060 [2023-08-24 00:04:19,960 INFO L134 LiptonReduction]: Checked pairs total: 41580 [2023-08-24 00:04:19,960 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-24 00:04:19,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:04:19,962 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;@1406abe9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:04:19,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:04:19,964 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:04:19,964 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 00:04:19,964 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:19,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:19,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:04:19,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:19,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash 36398800, now seen corresponding path program 1 times [2023-08-24 00:04:19,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:19,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843888148] [2023-08-24 00:04:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:19,982 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 00:04:19,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843888148] [2023-08-24 00:04:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843888148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:19,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:19,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:04:19,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277347248] [2023-08-24 00:04:19,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:19,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:19,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:19,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 348 [2023-08-24 00:04:19,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 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 00:04:19,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:19,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 348 [2023-08-24 00:04:19,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:04:22,555 INFO L124 PetriNetUnfolderBase]: 26726/38631 cut-off events. [2023-08-24 00:04:22,555 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-08-24 00:04:22,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77075 conditions, 38631 events. 26726/38631 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 248776 event pairs, 25439 based on Foata normal form. 7485/42788 useless extension candidates. Maximal degree in co-relation 32708. Up to 37651 conditions per place. [2023-08-24 00:04:22,687 INFO L140 encePairwiseOnDemand]: 325/348 looper letters, 43 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-08-24 00:04:22,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 264 flow [2023-08-24 00:04:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:04:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:04:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2023-08-24 00:04:22,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539272030651341 [2023-08-24 00:04:22,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2023-08-24 00:04:22,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2023-08-24 00:04:22,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:04:22,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2023-08-24 00:04:22,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:22,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:22,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:22,693 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 563 transitions. [2023-08-24 00:04:22,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 264 flow [2023-08-24 00:04:22,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:04:22,696 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2023-08-24 00:04:22,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-24 00:04:22,699 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-24 00:04:22,699 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2023-08-24 00:04:22,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:22,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:22,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:04:22,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 00:04:22,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:22,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1095709034, now seen corresponding path program 1 times [2023-08-24 00:04:22,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:22,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115535227] [2023-08-24 00:04:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:22,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:22,747 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 00:04:22,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:22,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115535227] [2023-08-24 00:04:22,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115535227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:04:22,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337379479] [2023-08-24 00:04:22,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:22,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:04:22,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:04:22,749 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 00:04:22,752 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 00:04:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:22,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:04:22,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:04:22,834 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 00:04:22,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:04:22,848 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 00:04:22,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337379479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:04:22,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:04:22,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 00:04:22,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712587893] [2023-08-24 00:04:22,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:04:22,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 00:04:22,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:22,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 00:04:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 00:04:22,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 348 [2023-08-24 00:04:22,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:04:22,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:22,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 348 [2023-08-24 00:04:22,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:04:23,563 INFO L124 PetriNetUnfolderBase]: 6868/11068 cut-off events. [2023-08-24 00:04:23,563 INFO L125 PetriNetUnfolderBase]: For 3978/3978 co-relation queries the response was YES. [2023-08-24 00:04:23,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25040 conditions, 11068 events. 6868/11068 cut-off events. For 3978/3978 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 73688 event pairs, 0 based on Foata normal form. 999/12067 useless extension candidates. Maximal degree in co-relation 2850. Up to 6640 conditions per place. [2023-08-24 00:04:23,625 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 84 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2023-08-24 00:04:23,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 401 flow [2023-08-24 00:04:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:04:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:04:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1057 transitions. [2023-08-24 00:04:23,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062260536398467 [2023-08-24 00:04:23,628 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1057 transitions. [2023-08-24 00:04:23,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1057 transitions. [2023-08-24 00:04:23,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:04:23,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1057 transitions. [2023-08-24 00:04:23,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.16666666666666) internal successors, (1057), 6 states have internal predecessors, (1057), 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 00:04:23,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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 00:04:23,719 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 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 00:04:23,719 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 1057 transitions. [2023-08-24 00:04:23,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 401 flow [2023-08-24 00:04:23,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 97 transitions, 393 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 00:04:23,729 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-08-24 00:04:23,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, 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 00:04:23,729 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-08-24 00:04:23,729 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-08-24 00:04:23,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 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 00:04:23,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:23,730 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 00:04:23,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 00:04:23,935 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 00:04:23,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:23,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:23,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1660335666, now seen corresponding path program 1 times [2023-08-24 00:04:23,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:23,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109606719] [2023-08-24 00:04:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:23,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:23,965 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:04:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:04:23,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:04:23,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:04:23,976 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:04:23,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:04:23,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 00:04:23,976 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:04:23,977 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:04:23,977 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 00:04:24,007 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 00:04:24,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 236 transitions, 516 flow [2023-08-24 00:04:24,056 INFO L124 PetriNetUnfolderBase]: 81/597 cut-off events. [2023-08-24 00:04:24,057 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:04:24,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 597 events. 81/597 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2345 event pairs, 6 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 416. Up to 32 conditions per place. [2023-08-24 00:04:24,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 236 transitions, 516 flow [2023-08-24 00:04:24,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 236 transitions, 516 flow [2023-08-24 00:04:24,064 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:04:24,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 236 transitions, 516 flow [2023-08-24 00:04:24,064 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 236 transitions, 516 flow [2023-08-24 00:04:24,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 236 transitions, 516 flow [2023-08-24 00:04:24,113 INFO L124 PetriNetUnfolderBase]: 81/597 cut-off events. [2023-08-24 00:04:24,113 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 00:04:24,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 597 events. 81/597 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2345 event pairs, 6 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 416. Up to 32 conditions per place. [2023-08-24 00:04:24,132 INFO L119 LiptonReduction]: Number of co-enabled transitions 29400 [2023-08-24 00:04:27,277 INFO L134 LiptonReduction]: Checked pairs total: 68142 [2023-08-24 00:04:27,278 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-24 00:04:27,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:04:27,279 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;@1406abe9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:04:27,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:04:27,281 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:04:27,281 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-08-24 00:04:27,281 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:04:27,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:04:27,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:04:27,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:04:27,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:04:27,281 INFO L85 PathProgramCache]: Analyzing trace with hash 50095338, now seen corresponding path program 1 times [2023-08-24 00:04:27,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:04:27,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227734619] [2023-08-24 00:04:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:04:27,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:04:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:04:27,328 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 00:04:27,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:04:27,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227734619] [2023-08-24 00:04:27,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227734619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:04:27,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:04:27,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:04:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270815895] [2023-08-24 00:04:27,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:04:27,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:04:27,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:04:27,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:04:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:04:27,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 408 [2023-08-24 00:04:27,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 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 00:04:27,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:04:27,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 408 [2023-08-24 00:04:27,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:05:01,746 INFO L124 PetriNetUnfolderBase]: 413529/548481 cut-off events. [2023-08-24 00:05:01,747 INFO L125 PetriNetUnfolderBase]: For 20310/20310 co-relation queries the response was YES. [2023-08-24 00:05:02,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1097270 conditions, 548481 events. 413529/548481 cut-off events. For 20310/20310 co-relation queries the response was YES. Maximal size of possible extension queue 9888. Compared 3886690 event pairs, 399008 based on Foata normal form. 108220/618660 useless extension candidates. Maximal degree in co-relation 113639. Up to 537994 conditions per place. [2023-08-24 00:05:03,624 INFO L140 encePairwiseOnDemand]: 378/408 looper letters, 54 selfloop transitions, 2 changer transitions 11/77 dead transitions. [2023-08-24 00:05:03,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 328 flow [2023-08-24 00:05:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 00:05:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 00:05:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-08-24 00:05:03,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465686274509803 [2023-08-24 00:05:03,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-08-24 00:05:03,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-08-24 00:05:03,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:05:03,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-08-24 00:05:03,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:03,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:03,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:03,630 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 232 flow. Second operand 3 states and 669 transitions. [2023-08-24 00:05:03,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 328 flow [2023-08-24 00:05:03,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 00:05:03,639 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 156 flow [2023-08-24 00:05:03,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-08-24 00:05:03,640 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-24 00:05:03,640 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 156 flow [2023-08-24 00:05:03,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:03,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:05:03,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 00:05:03,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 00:05:03,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:05:03,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:05:03,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1733828628, now seen corresponding path program 1 times [2023-08-24 00:05:03,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:05:03,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911180277] [2023-08-24 00:05:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:05:03,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:05:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:05:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:05:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:05:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911180277] [2023-08-24 00:05:03,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911180277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 00:05:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387578002] [2023-08-24 00:05:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:05:03,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 00:05:03,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 00:05:03,670 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 00:05:03,673 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 00:05:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:05:03,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 00:05:03,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 00:05:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:05:03,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 00:05:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:05:03,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387578002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 00:05:03,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 00:05:03,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 00:05:03,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680017832] [2023-08-24 00:05:03,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 00:05:03,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 00:05:03,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:05:03,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 00:05:03,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 00:05:03,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 408 [2023-08-24 00:05:03,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 192.28571428571428) internal successors, (1346), 7 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:03,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:05:03,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 408 [2023-08-24 00:05:03,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 00:05:19,784 INFO L124 PetriNetUnfolderBase]: 211588/277888 cut-off events. [2023-08-24 00:05:19,784 INFO L125 PetriNetUnfolderBase]: For 21978/21978 co-relation queries the response was YES. [2023-08-24 00:05:20,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581181 conditions, 277888 events. 211588/277888 cut-off events. For 21978/21978 co-relation queries the response was YES. Maximal size of possible extension queue 5729. Compared 1868427 event pairs, 9000 based on Foata normal form. 999/278887 useless extension candidates. Maximal degree in co-relation 66110. Up to 182081 conditions per place. [2023-08-24 00:05:21,530 INFO L140 encePairwiseOnDemand]: 404/408 looper letters, 134 selfloop transitions, 6 changer transitions 0/150 dead transitions. [2023-08-24 00:05:21,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 150 transitions, 626 flow [2023-08-24 00:05:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 00:05:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 00:05:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1283 transitions. [2023-08-24 00:05:21,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241013071895425 [2023-08-24 00:05:21,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1283 transitions. [2023-08-24 00:05:21,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1283 transitions. [2023-08-24 00:05:21,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 00:05:21,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1283 transitions. [2023-08-24 00:05:21,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.83333333333334) internal successors, (1283), 6 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:21,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:21,538 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:21,539 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 156 flow. Second operand 6 states and 1283 transitions. [2023-08-24 00:05:21,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 150 transitions, 626 flow [2023-08-24 00:05:21,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 150 transitions, 612 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 00:05:21,555 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-08-24 00:05:21,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-24 00:05:21,556 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-24 00:05:21,556 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-08-24 00:05:21,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 192.28571428571428) internal successors, (1346), 7 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:21,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:05:21,557 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 00:05:21,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 00:05:21,762 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 00:05:21,762 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:05:21,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:05:21,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1528345766, now seen corresponding path program 1 times [2023-08-24 00:05:21,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:05:21,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436391760] [2023-08-24 00:05:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:05:21,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:05:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:05:21,786 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 00:05:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 00:05:21,814 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 00:05:21,814 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 00:05:21,814 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 00:05:21,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 00:05:21,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 00:05:21,815 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 00:05:21,815 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 00:05:21,815 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 00:05:21,843 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 00:05:21,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 273 transitions, 606 flow [2023-08-24 00:05:21,930 INFO L124 PetriNetUnfolderBase]: 140/938 cut-off events. [2023-08-24 00:05:21,930 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 00:05:21,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 938 events. 140/938 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4308 event pairs, 23 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 642. Up to 80 conditions per place. [2023-08-24 00:05:21,939 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 273 transitions, 606 flow [2023-08-24 00:05:21,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 273 transitions, 606 flow [2023-08-24 00:05:21,944 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 00:05:21,944 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 273 transitions, 606 flow [2023-08-24 00:05:21,944 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 273 transitions, 606 flow [2023-08-24 00:05:21,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 273 transitions, 606 flow [2023-08-24 00:05:22,027 INFO L124 PetriNetUnfolderBase]: 140/938 cut-off events. [2023-08-24 00:05:22,028 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 00:05:22,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 938 events. 140/938 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4308 event pairs, 23 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 642. Up to 80 conditions per place. [2023-08-24 00:05:22,063 INFO L119 LiptonReduction]: Number of co-enabled transitions 43400 [2023-08-24 00:05:25,278 INFO L134 LiptonReduction]: Checked pairs total: 104667 [2023-08-24 00:05:25,278 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-24 00:05:25,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 00:05:25,280 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;@1406abe9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 00:05:25,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 00:05:25,281 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 00:05:25,281 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-24 00:05:25,281 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 00:05:25,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 00:05:25,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 00:05:25,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 00:05:25,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 00:05:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash 65641850, now seen corresponding path program 1 times [2023-08-24 00:05:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 00:05:25,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826149295] [2023-08-24 00:05:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 00:05:25,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 00:05:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 00:05:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 00:05:25,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 00:05:25,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826149295] [2023-08-24 00:05:25,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826149295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 00:05:25,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 00:05:25,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 00:05:25,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705880957] [2023-08-24 00:05:25,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 00:05:25,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 00:05:25,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 00:05:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 00:05:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 00:05:25,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 468 [2023-08-24 00:05:25,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 113 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 00:05:25,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 00:05:25,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 468 [2023-08-24 00:05:25,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand