/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:34:02,783 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:34:02,871 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-SemanticLbe.epf [2023-11-17 15:34:02,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:34:02,912 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:34:02,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:34:02,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:34:02,914 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:34:02,914 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:34:02,918 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:34:02,918 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:34:02,919 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:34:02,919 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:34:02,920 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:34:02,920 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:34:02,921 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:34:02,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:34:02,921 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:34:02,921 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:34:02,922 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:34:02,922 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:34:02,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:34:02,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:34:02,923 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:34:02,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:34:02,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:34:02,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:34:02,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:34:02,926 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:34:02,926 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:34:02,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:34:02,927 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:34:02,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:34:03,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:34:03,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:34:03,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:34:03,162 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:34:03,163 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:34:03,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-11-17 15:34:04,272 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:34:04,534 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:34:04,538 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-11-17 15:34:04,554 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8cd3323/eb41d6b63bbc4ba5a892d175b2777e4f/FLAG6fb3ad420 [2023-11-17 15:34:04,569 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8cd3323/eb41d6b63bbc4ba5a892d175b2777e4f [2023-11-17 15:34:04,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:34:04,572 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:34:04,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:34:04,573 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:34:04,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:34:04,578 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:34:04" (1/1) ... [2023-11-17 15:34:04,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70eff62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:04, skipping insertion in model container [2023-11-17 15:34:04,579 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:34:04" (1/1) ... [2023-11-17 15:34:04,631 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:34:04,921 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_05-lockfuns_racefree.i[30176,30189] [2023-11-17 15:34:04,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:34:04,955 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:34:04,989 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_05-lockfuns_racefree.i[30176,30189] [2023-11-17 15:34:04,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:34:05,030 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:34:05,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05 WrapperNode [2023-11-17 15:34:05,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:34:05,031 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:34:05,031 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:34:05,031 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:34:05,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,058 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,079 INFO L138 Inliner]: procedures = 173, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 122 [2023-11-17 15:34:05,079 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:34:05,080 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:34:05,080 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:34:05,080 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:34:05,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,090 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,090 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,097 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,101 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,102 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,105 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:34:05,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:34:05,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:34:05,106 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:34:05,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (1/1) ... [2023-11-17 15:34:05,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:34:05,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:34:05,148 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) [2023-11-17 15:34:05,169 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 [2023-11-17 15:34:05,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:34:05,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:34:05,179 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:34:05,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:34:05,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:34:05,180 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:34:05,180 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:34:05,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:34:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:34:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:34:05,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:34:05,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:34:05,182 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:34:05,316 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:34:05,318 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:34:05,481 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:34:05,511 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:34:05,511 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:34:05,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:34:05 BoogieIcfgContainer [2023-11-17 15:34:05,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:34:05,515 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:34:05,515 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:34:05,517 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:34:05,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:34:04" (1/3) ... [2023-11-17 15:34:05,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255685f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:34:05, skipping insertion in model container [2023-11-17 15:34:05,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:34:05" (2/3) ... [2023-11-17 15:34:05,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255685f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:34:05, skipping insertion in model container [2023-11-17 15:34:05,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:34:05" (3/3) ... [2023-11-17 15:34:05,520 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2023-11-17 15:34:05,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:34:05,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:34:05,538 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:34:05,598 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:34:05,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 116 transitions, 239 flow [2023-11-17 15:34:05,689 INFO L124 PetriNetUnfolderBase]: 17/160 cut-off events. [2023-11-17 15:34:05,689 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:34:05,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 160 events. 17/160 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 416 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 84. Up to 4 conditions per place. [2023-11-17 15:34:05,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 116 transitions, 239 flow [2023-11-17 15:34:05,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 111 transitions, 226 flow [2023-11-17 15:34:05,704 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:34:05,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 111 transitions, 226 flow [2023-11-17 15:34:05,729 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 111 transitions, 226 flow [2023-11-17 15:34:05,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 111 transitions, 226 flow [2023-11-17 15:34:05,759 INFO L124 PetriNetUnfolderBase]: 16/155 cut-off events. [2023-11-17 15:34:05,760 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:05,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 155 events. 16/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 406 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 84. Up to 4 conditions per place. [2023-11-17 15:34:05,763 INFO L119 LiptonReduction]: Number of co-enabled transitions 3500 [2023-11-17 15:34:08,161 INFO L134 LiptonReduction]: Checked pairs total: 4496 [2023-11-17 15:34:08,161 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-11-17 15:34:08,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:08,182 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=LoopHeads, 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;@3478232f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:08,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:08,185 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:08,185 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:34:08,185 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:08,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:08,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:08,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:08,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash 15367661, now seen corresponding path program 1 times [2023-11-17 15:34:08,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981155379] [2023-11-17 15:34:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:08,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:08,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981155379] [2023-11-17 15:34:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981155379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:08,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:08,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:08,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5225444] [2023-11-17 15:34:08,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:08,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:08,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:08,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:08,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 221 [2023-11-17 15:34:08,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2023-11-17 15:34:08,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:08,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 221 [2023-11-17 15:34:08,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:08,583 INFO L124 PetriNetUnfolderBase]: 72/174 cut-off events. [2023-11-17 15:34:08,583 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:08,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 174 events. 72/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 721 event pairs, 0 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2023-11-17 15:34:08,588 INFO L140 encePairwiseOnDemand]: 209/221 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-17 15:34:08,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 120 flow [2023-11-17 15:34:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:34:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:34:08,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-11-17 15:34:08,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419306184012066 [2023-11-17 15:34:08,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-11-17 15:34:08,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-11-17 15:34:08,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:08,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-11-17 15:34:08,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 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) [2023-11-17 15:34:08,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 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) [2023-11-17 15:34:08,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 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) [2023-11-17 15:34:08,622 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 64 flow. Second operand 3 states and 293 transitions. [2023-11-17 15:34:08,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 120 flow [2023-11-17 15:34:08,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:34:08,627 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-17 15:34:08,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-17 15:34:08,633 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-17 15:34:08,633 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-17 15:34:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2023-11-17 15:34:08,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:08,634 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:34:08,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:34:08,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:08,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1876865932, now seen corresponding path program 1 times [2023-11-17 15:34:08,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:08,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726811568] [2023-11-17 15:34:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:08,681 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:34:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:08,723 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:34:08,724 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:34:08,725 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:34:08,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:34:08,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:34:08,727 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:34:08,730 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:34:08,731 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:34:08,756 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:34:08,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 153 transitions, 322 flow [2023-11-17 15:34:08,790 INFO L124 PetriNetUnfolderBase]: 31/267 cut-off events. [2023-11-17 15:34:08,791 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:34:08,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 267 events. 31/267 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 878 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2023-11-17 15:34:08,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 153 transitions, 322 flow [2023-11-17 15:34:08,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 153 transitions, 322 flow [2023-11-17 15:34:08,796 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:34:08,796 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 153 transitions, 322 flow [2023-11-17 15:34:08,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 153 transitions, 322 flow [2023-11-17 15:34:08,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 153 transitions, 322 flow [2023-11-17 15:34:08,821 INFO L124 PetriNetUnfolderBase]: 31/267 cut-off events. [2023-11-17 15:34:08,821 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:34:08,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 267 events. 31/267 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 878 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2023-11-17 15:34:08,830 INFO L119 LiptonReduction]: Number of co-enabled transitions 10220 [2023-11-17 15:34:11,449 INFO L134 LiptonReduction]: Checked pairs total: 17475 [2023-11-17 15:34:11,449 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-11-17 15:34:11,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:11,452 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=LoopHeads, 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;@3478232f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:11,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:11,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:11,454 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:34:11,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:11,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:11,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:11,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:11,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:11,455 INFO L85 PathProgramCache]: Analyzing trace with hash 25455911, now seen corresponding path program 1 times [2023-11-17 15:34:11,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:11,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633210304] [2023-11-17 15:34:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:11,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:11,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:11,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633210304] [2023-11-17 15:34:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633210304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:11,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:11,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:11,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567325895] [2023-11-17 15:34:11,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:11,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:11,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:11,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 291 [2023-11-17 15:34:11,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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) [2023-11-17 15:34:11,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:11,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 291 [2023-11-17 15:34:11,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:11,795 INFO L124 PetriNetUnfolderBase]: 1642/2949 cut-off events. [2023-11-17 15:34:11,795 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:34:11,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5685 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 17551 event pairs, 752 based on Foata normal form. 214/2864 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2023-11-17 15:34:11,806 INFO L140 encePairwiseOnDemand]: 274/291 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2023-11-17 15:34:11,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 202 flow [2023-11-17 15:34:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:34:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:34:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-11-17 15:34:11,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436426116838488 [2023-11-17 15:34:11,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-11-17 15:34:11,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-11-17 15:34:11,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:11,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-11-17 15:34:11,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-11-17 15:34:11,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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) [2023-11-17 15:34:11,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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) [2023-11-17 15:34:11,814 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 126 flow. Second operand 3 states and 381 transitions. [2023-11-17 15:34:11,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 202 flow [2023-11-17 15:34:11,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:34:11,816 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 86 flow [2023-11-17 15:34:11,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=98, 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=86, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-11-17 15:34:11,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 15:34:11,817 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 86 flow [2023-11-17 15:34:11,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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) [2023-11-17 15:34:11,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:11,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:11,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:34:11,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:11,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:11,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1348159419, now seen corresponding path program 1 times [2023-11-17 15:34:11,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:11,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143668378] [2023-11-17 15:34:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:11,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:11,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:11,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143668378] [2023-11-17 15:34:11,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143668378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:34:11,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315384950] [2023-11-17 15:34:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:11,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:34:11,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:34:11,873 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) [2023-11-17 15:34:11,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:34:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:11,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:34:11,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:34:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:11,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:34:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:12,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315384950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:34:12,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:34:12,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:34:12,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37232278] [2023-11-17 15:34:12,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:34:12,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:34:12,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:34:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:34:12,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 291 [2023-11-17 15:34:12,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 108.28571428571429) internal successors, (758), 7 states have internal predecessors, (758), 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) [2023-11-17 15:34:12,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:12,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 291 [2023-11-17 15:34:12,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:12,126 INFO L124 PetriNetUnfolderBase]: 376/769 cut-off events. [2023-11-17 15:34:12,127 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-11-17 15:34:12,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3949 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 172. Up to 450 conditions per place. [2023-11-17 15:34:12,131 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-11-17 15:34:12,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 226 flow [2023-11-17 15:34:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:34:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:34:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 580 transitions. [2023-11-17 15:34:12,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39862542955326463 [2023-11-17 15:34:12,133 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 580 transitions. [2023-11-17 15:34:12,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 580 transitions. [2023-11-17 15:34:12,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:12,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 580 transitions. [2023-11-17 15:34:12,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:34:12,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 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) [2023-11-17 15:34:12,138 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 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) [2023-11-17 15:34:12,138 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 86 flow. Second operand 5 states and 580 transitions. [2023-11-17 15:34:12,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 226 flow [2023-11-17 15:34:12,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:34:12,140 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-11-17 15:34:12,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, 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} [2023-11-17 15:34:12,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-11-17 15:34:12,141 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-11-17 15:34:12,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.28571428571429) internal successors, (758), 7 states have internal predecessors, (758), 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) [2023-11-17 15:34:12,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:12,142 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:34:12,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 15:34:12,348 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 [2023-11-17 15:34:12,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:12,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:12,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1185223008, now seen corresponding path program 1 times [2023-11-17 15:34:12,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:12,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007226276] [2023-11-17 15:34:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:12,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:12,368 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:34:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:12,390 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:34:12,391 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:34:12,391 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:34:12,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:34:12,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:34:12,391 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:34:12,392 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:34:12,392 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:34:12,418 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:34:12,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 190 transitions, 407 flow [2023-11-17 15:34:12,462 INFO L124 PetriNetUnfolderBase]: 50/409 cut-off events. [2023-11-17 15:34:12,462 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:34:12,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 409 events. 50/409 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1452 event pairs, 1 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 275. Up to 16 conditions per place. [2023-11-17 15:34:12,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 190 transitions, 407 flow [2023-11-17 15:34:12,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 190 transitions, 407 flow [2023-11-17 15:34:12,468 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:34:12,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 190 transitions, 407 flow [2023-11-17 15:34:12,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 190 transitions, 407 flow [2023-11-17 15:34:12,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 190 transitions, 407 flow [2023-11-17 15:34:12,507 INFO L124 PetriNetUnfolderBase]: 50/409 cut-off events. [2023-11-17 15:34:12,507 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:34:12,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 409 events. 50/409 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1452 event pairs, 1 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 275. Up to 16 conditions per place. [2023-11-17 15:34:12,522 INFO L119 LiptonReduction]: Number of co-enabled transitions 19320 [2023-11-17 15:34:15,436 INFO L134 LiptonReduction]: Checked pairs total: 36534 [2023-11-17 15:34:15,437 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-11-17 15:34:15,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:15,447 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=LoopHeads, 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;@3478232f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:15,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:15,449 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:15,449 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:34:15,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:15,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:15,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:15,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:15,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash 37545279, now seen corresponding path program 1 times [2023-11-17 15:34:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:15,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661457796] [2023-11-17 15:34:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:15,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:15,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661457796] [2023-11-17 15:34:15,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661457796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:15,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:15,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:15,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725212842] [2023-11-17 15:34:15,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:15,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:15,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:15,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:15,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:15,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 356 [2023-11-17 15:34:15,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 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) [2023-11-17 15:34:15,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:15,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 356 [2023-11-17 15:34:15,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:18,550 INFO L124 PetriNetUnfolderBase]: 26025/39425 cut-off events. [2023-11-17 15:34:18,550 INFO L125 PetriNetUnfolderBase]: For 1119/1119 co-relation queries the response was YES. [2023-11-17 15:34:18,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76804 conditions, 39425 events. 26025/39425 cut-off events. For 1119/1119 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 276450 event pairs, 16672 based on Foata normal form. 3248/39549 useless extension candidates. Maximal degree in co-relation 5780. Up to 36692 conditions per place. [2023-11-17 15:34:18,778 INFO L140 encePairwiseOnDemand]: 333/356 looper letters, 43 selfloop transitions, 2 changer transitions 10/65 dead transitions. [2023-11-17 15:34:18,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 265 flow [2023-11-17 15:34:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:34:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:34:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-11-17 15:34:18,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43820224719101125 [2023-11-17 15:34:18,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-11-17 15:34:18,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-11-17 15:34:18,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:18,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-11-17 15:34:18,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2023-11-17 15:34:18,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 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) [2023-11-17 15:34:18,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 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) [2023-11-17 15:34:18,785 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 175 flow. Second operand 3 states and 468 transitions. [2023-11-17 15:34:18,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 265 flow [2023-11-17 15:34:18,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 265 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:34:18,790 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 118 flow [2023-11-17 15:34:18,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=135, 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=118, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-11-17 15:34:18,792 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-17 15:34:18,793 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 118 flow [2023-11-17 15:34:18,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 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) [2023-11-17 15:34:18,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:18,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:18,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:34:18,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:18,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash 457565708, now seen corresponding path program 1 times [2023-11-17 15:34:18,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:18,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914095029] [2023-11-17 15:34:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:18,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:18,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914095029] [2023-11-17 15:34:18,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914095029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:34:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9992441] [2023-11-17 15:34:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:18,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:34:18,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:34:18,861 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) [2023-11-17 15:34:18,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:34:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:18,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:34:18,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:34:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:18,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:34:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:18,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9992441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:34:18,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:34:18,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:34:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310704360] [2023-11-17 15:34:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:34:18,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:34:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:34:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:34:18,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 356 [2023-11-17 15:34:18,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 131.28571428571428) internal successors, (919), 7 states have internal predecessors, (919), 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) [2023-11-17 15:34:18,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:18,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 356 [2023-11-17 15:34:18,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:19,827 INFO L124 PetriNetUnfolderBase]: 6074/9839 cut-off events. [2023-11-17 15:34:19,828 INFO L125 PetriNetUnfolderBase]: For 3540/3540 co-relation queries the response was YES. [2023-11-17 15:34:19,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19845 conditions, 9839 events. 6074/9839 cut-off events. For 3540/3540 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 65400 event pairs, 0 based on Foata normal form. 890/10729 useless extension candidates. Maximal degree in co-relation 2031. Up to 5880 conditions per place. [2023-11-17 15:34:19,875 INFO L140 encePairwiseOnDemand]: 353/356 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-11-17 15:34:19,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 392 flow [2023-11-17 15:34:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:34:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:34:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 863 transitions. [2023-11-17 15:34:19,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40402621722846443 [2023-11-17 15:34:19,880 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 863 transitions. [2023-11-17 15:34:19,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 863 transitions. [2023-11-17 15:34:19,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:19,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 863 transitions. [2023-11-17 15:34:19,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.83333333333334) internal successors, (863), 6 states have internal predecessors, (863), 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) [2023-11-17 15:34:19,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 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) [2023-11-17 15:34:19,887 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 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) [2023-11-17 15:34:19,887 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 118 flow. Second operand 6 states and 863 transitions. [2023-11-17 15:34:19,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 392 flow [2023-11-17 15:34:19,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 388 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:34:19,894 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 118 flow [2023-11-17 15:34:19,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=106, 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=118, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-11-17 15:34:19,897 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-17 15:34:19,900 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 118 flow [2023-11-17 15:34:19,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.28571428571428) internal successors, (919), 7 states have internal predecessors, (919), 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) [2023-11-17 15:34:19,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:19,902 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:34:19,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 15:34:20,108 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 [2023-11-17 15:34:20,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:20,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:20,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1209244263, now seen corresponding path program 1 times [2023-11-17 15:34:20,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:20,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552378845] [2023-11-17 15:34:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:20,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:20,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:34:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:20,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:34:20,144 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:34:20,144 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:34:20,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:34:20,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:34:20,145 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:34:20,146 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:34:20,146 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:34:20,172 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:34:20,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 227 transitions, 494 flow [2023-11-17 15:34:20,238 INFO L124 PetriNetUnfolderBase]: 81/623 cut-off events. [2023-11-17 15:34:20,238 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:34:20,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 623 events. 81/623 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2510 event pairs, 6 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 429. Up to 32 conditions per place. [2023-11-17 15:34:20,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 227 transitions, 494 flow [2023-11-17 15:34:20,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 227 transitions, 494 flow [2023-11-17 15:34:20,250 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:34:20,251 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 227 transitions, 494 flow [2023-11-17 15:34:20,251 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 227 transitions, 494 flow [2023-11-17 15:34:20,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 227 transitions, 494 flow [2023-11-17 15:34:20,314 INFO L124 PetriNetUnfolderBase]: 81/623 cut-off events. [2023-11-17 15:34:20,314 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:34:20,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 623 events. 81/623 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2510 event pairs, 6 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 429. Up to 32 conditions per place. [2023-11-17 15:34:20,340 INFO L119 LiptonReduction]: Number of co-enabled transitions 31080 [2023-11-17 15:34:23,560 INFO L134 LiptonReduction]: Checked pairs total: 62105 [2023-11-17 15:34:23,560 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-11-17 15:34:23,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:34:23,562 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=LoopHeads, 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;@3478232f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:34:23,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:34:23,563 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:34:23,563 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:34:23,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:34:23,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:23,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:34:23,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:23,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:23,564 INFO L85 PathProgramCache]: Analyzing trace with hash 51698077, now seen corresponding path program 1 times [2023-11-17 15:34:23,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:23,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943890527] [2023-11-17 15:34:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:23,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:23,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:23,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943890527] [2023-11-17 15:34:23,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943890527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:34:23,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:34:23,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:34:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417835527] [2023-11-17 15:34:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:34:23,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:34:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:34:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:34:23,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 423 [2023-11-17 15:34:23,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 228 flow. Second operand has 3 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) [2023-11-17 15:34:23,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:23,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 423 [2023-11-17 15:34:23,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:45,659 INFO L124 PetriNetUnfolderBase]: 235096/321990 cut-off events. [2023-11-17 15:34:45,660 INFO L125 PetriNetUnfolderBase]: For 13122/13122 co-relation queries the response was YES. [2023-11-17 15:34:46,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635926 conditions, 321990 events. 235096/321990 cut-off events. For 13122/13122 co-relation queries the response was YES. Maximal size of possible extension queue 7097. Compared 2428811 event pairs, 173888 based on Foata normal form. 32304/333376 useless extension candidates. Maximal degree in co-relation 61089. Up to 307677 conditions per place. [2023-11-17 15:34:46,944 INFO L140 encePairwiseOnDemand]: 393/423 looper letters, 47 selfloop transitions, 2 changer transitions 11/76 dead transitions. [2023-11-17 15:34:46,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 310 flow [2023-11-17 15:34:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:34:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:34:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-17 15:34:46,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326241134751773 [2023-11-17 15:34:46,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-17 15:34:46,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-17 15:34:46,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:46,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-17 15:34:46,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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) [2023-11-17 15:34:46,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-17 15:34:46,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-17 15:34:46,950 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 228 flow. Second operand 3 states and 549 transitions. [2023-11-17 15:34:46,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 310 flow [2023-11-17 15:34:46,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:34:46,954 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 152 flow [2023-11-17 15:34:46,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=174, 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=152, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-11-17 15:34:46,955 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-11-17 15:34:46,955 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 152 flow [2023-11-17 15:34:46,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-17 15:34:46,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:46,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:46,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:34:46,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:46,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1595620726, now seen corresponding path program 1 times [2023-11-17 15:34:46,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:46,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137263796] [2023-11-17 15:34:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:46,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:46,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:34:46,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137263796] [2023-11-17 15:34:46,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137263796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:34:46,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409432458] [2023-11-17 15:34:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:46,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:34:46,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:34:46,989 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) [2023-11-17 15:34:46,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 15:34:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:34:47,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:34:47,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:34:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:47,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:34:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:34:47,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409432458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:34:47,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:34:47,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:34:47,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252238088] [2023-11-17 15:34:47,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:34:47,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:34:47,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:34:47,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:34:47,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:34:47,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 423 [2023-11-17 15:34:47,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 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) [2023-11-17 15:34:47,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:34:47,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 423 [2023-11-17 15:34:47,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:55,309 INFO L124 PetriNetUnfolderBase]: 107558/143459 cut-off events. [2023-11-17 15:34:55,309 INFO L125 PetriNetUnfolderBase]: For 12061/12061 co-relation queries the response was YES. [2023-11-17 15:34:55,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297174 conditions, 143459 events. 107558/143459 cut-off events. For 12061/12061 co-relation queries the response was YES. Maximal size of possible extension queue 3603. Compared 985852 event pairs, 4653 based on Foata normal form. 584/144040 useless extension candidates. Maximal degree in co-relation 220800. Up to 92673 conditions per place. [2023-11-17 15:34:55,997 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 113 selfloop transitions, 6 changer transitions 0/135 dead transitions. [2023-11-17 15:34:55,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 135 transitions, 550 flow [2023-11-17 15:34:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:34:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:34:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1034 transitions. [2023-11-17 15:34:56,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-11-17 15:34:56,000 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1034 transitions. [2023-11-17 15:34:56,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1034 transitions. [2023-11-17 15:34:56,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:56,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1034 transitions. [2023-11-17 15:34:56,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.33333333333334) internal successors, (1034), 6 states have internal predecessors, (1034), 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) [2023-11-17 15:34:56,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 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) [2023-11-17 15:34:56,006 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 423.0) internal successors, (2961), 7 states have internal predecessors, (2961), 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) [2023-11-17 15:34:56,006 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 152 flow. Second operand 6 states and 1034 transitions. [2023-11-17 15:34:56,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 135 transitions, 550 flow [2023-11-17 15:34:56,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 135 transitions, 542 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 15:34:56,013 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 184 flow [2023-11-17 15:34:56,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=144, 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=184, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-11-17 15:34:56,013 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-11-17 15:34:56,013 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 184 flow [2023-11-17 15:34:56,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 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) [2023-11-17 15:34:56,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:34:56,014 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:34:56,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 15:34:56,219 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 [2023-11-17 15:34:56,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:34:56,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:34:56,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1531211147, now seen corresponding path program 1 times [2023-11-17 15:34:56,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:34:56,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52106569] [2023-11-17 15:34:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:34:56,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:34:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:56,240 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:34:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:34:56,262 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:34:56,262 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:34:56,262 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:34:56,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:34:56,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:34:56,263 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:34:56,263 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:34:56,263 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:34:56,296 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 15:34:56,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 264 transitions, 583 flow [2023-11-17 15:34:56,421 INFO L124 PetriNetUnfolderBase]: 140/985 cut-off events. [2023-11-17 15:34:56,421 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:34:56,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 985 events. 140/985 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4677 event pairs, 23 based on Foata normal form. 0/855 useless extension candidates. Maximal degree in co-relation 668. Up to 80 conditions per place. [2023-11-17 15:34:56,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 264 transitions, 583 flow [2023-11-17 15:34:56,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 264 transitions, 583 flow [2023-11-17 15:34:56,442 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:34:56,442 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 264 transitions, 583 flow [2023-11-17 15:34:56,443 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 264 transitions, 583 flow [2023-11-17 15:34:56,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 264 transitions, 583 flow [2023-11-17 15:34:56,749 INFO L124 PetriNetUnfolderBase]: 140/985 cut-off events. [2023-11-17 15:34:56,750 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:34:56,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 985 events. 140/985 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4677 event pairs, 23 based on Foata normal form. 0/855 useless extension candidates. Maximal degree in co-relation 668. Up to 80 conditions per place. [2023-11-17 15:34:56,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 45500 [2023-11-17 15:35:00,058 INFO L134 LiptonReduction]: Checked pairs total: 93550 [2023-11-17 15:35:00,058 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-11-17 15:35:00,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:35:00,060 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=LoopHeads, 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;@3478232f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:35:00,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:35:00,061 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:35:00,061 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 15:35:00,061 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:00,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:00,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:35:00,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:00,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash 67787503, now seen corresponding path program 1 times [2023-11-17 15:35:00,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:00,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319698743] [2023-11-17 15:35:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:00,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:35:00,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:00,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319698743] [2023-11-17 15:35:00,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319698743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:00,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:00,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:35:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216907943] [2023-11-17 15:35:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:00,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:00,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 486 [2023-11-17 15:35:00,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 113 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 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) [2023-11-17 15:35:00,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:00,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 486 [2023-11-17 15:35:00,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand