/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 --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:35:30,616 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:35:30,695 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 11:35:30,734 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:35:30,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:35:30,735 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:35:30,735 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:35:30,735 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:35:30,736 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:35:30,736 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:35:30,737 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:35:30,737 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:35:30,737 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:35:30,737 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:35:30,738 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:35:30,738 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:35:30,738 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:35:30,739 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:35:30,739 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:35:30,739 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:35:30,740 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:35:30,744 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:35:30,744 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:35:30,744 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:35:30,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:35:30,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:35:30,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:35:30,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:35:30,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:35:30,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:35:30,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:35:30,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:35:30,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:35:30,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:35:31,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:35:31,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:35:31,024 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:35:31,024 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:35:31,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-11-17 11:35:32,251 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:35:32,526 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:35:32,527 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-11-17 11:35:32,539 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98346894c/820c28d778b14b04b6329876a2244777/FLAGaf162df2c [2023-11-17 11:35:32,553 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98346894c/820c28d778b14b04b6329876a2244777 [2023-11-17 11:35:32,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:35:32,556 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:35:32,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:35:32,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:35:32,561 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:35:32,561 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:35:32" (1/1) ... [2023-11-17 11:35:32,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7234c2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:32, skipping insertion in model container [2023-11-17 11:35:32,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:35:32" (1/1) ... [2023-11-17 11:35:32,614 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:35:32,874 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_02-simple_racefree.i[30176,30189] [2023-11-17 11:35:32,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:35:32,916 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:35:32,954 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_02-simple_racefree.i[30176,30189] [2023-11-17 11:35:32,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:35:33,000 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:35:33,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33 WrapperNode [2023-11-17 11:35:33,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:35:33,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:35:33,002 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:35:33,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:35:33,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,039 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,066 INFO L138 Inliner]: procedures = 171, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2023-11-17 11:35:33,066 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:35:33,067 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:35:33,067 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:35:33,067 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:35:33,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,079 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,089 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,096 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,097 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,101 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:35:33,102 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:35:33,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:35:33,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:35:33,103 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (1/1) ... [2023-11-17 11:35:33,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:35:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:35:33,134 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 11:35:33,136 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 11:35:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:35:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:35:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:35:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:35:33,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:35:33,158 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:35:33,158 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:35:33,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:35:33,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:35:33,158 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:35:33,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:35:33,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:35:33,160 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 11:35:33,278 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:35:33,280 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:35:33,508 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:35:33,650 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:35:33,650 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 11:35:33,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:35:33 BoogieIcfgContainer [2023-11-17 11:35:33,651 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:35:33,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:35:33,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:35:33,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:35:33,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:35:32" (1/3) ... [2023-11-17 11:35:33,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed150b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:35:33, skipping insertion in model container [2023-11-17 11:35:33,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:35:33" (2/3) ... [2023-11-17 11:35:33,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed150b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:35:33, skipping insertion in model container [2023-11-17 11:35:33,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:35:33" (3/3) ... [2023-11-17 11:35:33,665 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2023-11-17 11:35:33,678 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:35:33,678 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:35:33,678 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:35:33,717 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:35:33,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 49 transitions, 105 flow [2023-11-17 11:35:33,800 INFO L124 PetriNetUnfolderBase]: 13/69 cut-off events. [2023-11-17 11:35:33,801 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:35:33,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 69 events. 13/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 230 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 44. Up to 4 conditions per place. [2023-11-17 11:35:33,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 49 transitions, 105 flow [2023-11-17 11:35:33,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 47 transitions, 98 flow [2023-11-17 11:35:33,811 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:33,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 47 transitions, 98 flow [2023-11-17 11:35:33,826 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 47 transitions, 98 flow [2023-11-17 11:35:33,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 47 transitions, 98 flow [2023-11-17 11:35:33,841 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2023-11-17 11:35:33,841 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:33,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 67 events. 12/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 224 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 44. Up to 4 conditions per place. [2023-11-17 11:35:33,843 INFO L119 LiptonReduction]: Number of co-enabled transitions 1012 [2023-11-17 11:35:34,458 INFO L134 LiptonReduction]: Checked pairs total: 2138 [2023-11-17 11:35:34,458 INFO L136 LiptonReduction]: Total number of compositions: 33 [2023-11-17 11:35:34,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:34,488 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;@1cd0ab81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:34,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:34,496 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:34,496 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 11:35:34,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:34,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:34,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:34,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:34,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash 10911325, now seen corresponding path program 1 times [2023-11-17 11:35:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:34,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302754685] [2023-11-17 11:35:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:34,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:34,704 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 11:35:34,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:34,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302754685] [2023-11-17 11:35:34,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302754685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:34,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:34,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:34,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145986429] [2023-11-17 11:35:34,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:34,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:34,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:34,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 82 [2023-11-17 11:35:34,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 11:35:34,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:34,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 82 [2023-11-17 11:35:34,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:34,835 INFO L124 PetriNetUnfolderBase]: 72/174 cut-off events. [2023-11-17 11:35:34,835 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:34,836 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 13. Compared 697 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 11:35:34,838 INFO L140 encePairwiseOnDemand]: 69/82 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-17 11:35:34,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 120 flow [2023-11-17 11:35:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:35:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:35:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-17 11:35:34,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2023-11-17 11:35:34,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-17 11:35:34,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-17 11:35:34,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:34,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-17 11:35:34,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 11:35:34,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 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 11:35:34,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 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 11:35:34,860 INFO L175 Difference]: Start difference. First operand has 25 places, 31 transitions, 66 flow. Second operand 3 states and 90 transitions. [2023-11-17 11:35:34,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 120 flow [2023-11-17 11:35:34,863 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 11:35:34,864 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 46 flow [2023-11-17 11:35:34,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, 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 11:35:34,869 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-17 11:35:34,869 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 46 flow [2023-11-17 11:35:34,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 11:35:34,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:34,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:35:34,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:35:34,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:34,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794227, now seen corresponding path program 1 times [2023-11-17 11:35:34,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:34,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179082825] [2023-11-17 11:35:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:34,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:35:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:34,926 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:35:34,927 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:35:34,928 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:35:34,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:35:34,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:35:34,930 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:35:34,933 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:35:34,933 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:35:34,971 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:35:34,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:34,995 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2023-11-17 11:35:34,995 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:35:34,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 121 events. 24/121 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 479 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-11-17 11:35:34,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:34,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:34,998 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:34,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:34,999 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:34,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 74 transitions, 164 flow [2023-11-17 11:35:35,012 INFO L124 PetriNetUnfolderBase]: 24/121 cut-off events. [2023-11-17 11:35:35,013 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:35:35,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 121 events. 24/121 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 479 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-11-17 11:35:35,019 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-11-17 11:35:35,808 INFO L134 LiptonReduction]: Checked pairs total: 7914 [2023-11-17 11:35:35,808 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-11-17 11:35:35,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:35,811 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;@1cd0ab81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:35,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:35,813 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:35,813 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 11:35:35,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:35,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:35,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:35,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:35,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:35,814 INFO L85 PathProgramCache]: Analyzing trace with hash 14237926, now seen corresponding path program 1 times [2023-11-17 11:35:35,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:35,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170468243] [2023-11-17 11:35:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:35,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:35,861 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 11:35:35,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:35,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170468243] [2023-11-17 11:35:35,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170468243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:35,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:35,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:35,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458634197] [2023-11-17 11:35:35,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:35,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:35,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:35,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:35,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 124 [2023-11-17 11:35:35,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 50 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 11:35:35,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:35,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 124 [2023-11-17 11:35:35,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:36,161 INFO L124 PetriNetUnfolderBase]: 1642/2708 cut-off events. [2023-11-17 11:35:36,161 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-17 11:35:36,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5444 conditions, 2708 events. 1642/2708 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 13477 event pairs, 1515 based on Foata normal form. 214/2632 useless extension candidates. Maximal degree in co-relation 4394. Up to 2673 conditions per place. [2023-11-17 11:35:36,175 INFO L140 encePairwiseOnDemand]: 106/124 looper letters, 32 selfloop transitions, 2 changer transitions 8/45 dead transitions. [2023-11-17 11:35:36,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 190 flow [2023-11-17 11:35:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:35:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:35:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-17 11:35:36,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2023-11-17 11:35:36,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-17 11:35:36,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-17 11:35:36,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:36,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-17 11:35:36,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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 11:35:36,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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 11:35:36,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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 11:35:36,184 INFO L175 Difference]: Start difference. First operand has 38 places, 50 transitions, 116 flow. Second operand 3 states and 133 transitions. [2023-11-17 11:35:36,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 190 flow [2023-11-17 11:35:36,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:35:36,189 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 76 flow [2023-11-17 11:35:36,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-11-17 11:35:36,189 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-17 11:35:36,190 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 76 flow [2023-11-17 11:35:36,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 11:35:36,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:36,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:35:36,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:35:36,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:36,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:36,191 INFO L85 PathProgramCache]: Analyzing trace with hash 657451295, now seen corresponding path program 1 times [2023-11-17 11:35:36,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:36,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369381312] [2023-11-17 11:35:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:36,273 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 11:35:36,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369381312] [2023-11-17 11:35:36,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369381312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:35:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583586523] [2023-11-17 11:35:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:36,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:35:36,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:35:36,280 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 11:35:36,304 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 11:35:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:36,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:35:36,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:35:36,419 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 11:35:36,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:35:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:35:36,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583586523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:35:36,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:35:36,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:35:36,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751814931] [2023-11-17 11:35:36,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:35:36,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:35:36,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:36,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:35:36,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:35:36,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 124 [2023-11-17 11:35:36,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 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 11:35:36,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:36,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 124 [2023-11-17 11:35:36,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:36,583 INFO L124 PetriNetUnfolderBase]: 376/676 cut-off events. [2023-11-17 11:35:36,583 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-17 11:35:36,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 676 events. 376/676 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2795 event pairs, 63 based on Foata normal form. 90/766 useless extension candidates. Maximal degree in co-relation 162. Up to 450 conditions per place. [2023-11-17 11:35:36,588 INFO L140 encePairwiseOnDemand]: 121/124 looper letters, 45 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-17 11:35:36,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 216 flow [2023-11-17 11:35:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:35:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:35:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2023-11-17 11:35:36,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2661290322580645 [2023-11-17 11:35:36,590 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 165 transitions. [2023-11-17 11:35:36,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 165 transitions. [2023-11-17 11:35:36,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:36,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 165 transitions. [2023-11-17 11:35:36,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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 11:35:36,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 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 11:35:36,593 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 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 11:35:36,593 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 76 flow. Second operand 5 states and 165 transitions. [2023-11-17 11:35:36,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 216 flow [2023-11-17 11:35:36,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:35:36,595 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 72 flow [2023-11-17 11:35:36,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-11-17 11:35:36,596 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-17 11:35:36,597 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 72 flow [2023-11-17 11:35:36,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 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 11:35:36,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:36,597 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:35:36,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:35:36,804 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 11:35:36,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:36,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash 366728715, now seen corresponding path program 1 times [2023-11-17 11:35:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:36,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561179000] [2023-11-17 11:35:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:36,825 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:35:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:36,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:35:36,849 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:35:36,850 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:35:36,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:35:36,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:35:36,850 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:35:36,851 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:35:36,851 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:35:36,900 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:35:36,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:36,917 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2023-11-17 11:35:36,917 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:35:36,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 184 events. 38/184 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 780 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 132. Up to 12 conditions per place. [2023-11-17 11:35:36,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:36,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:36,920 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:36,920 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:36,921 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:36,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 99 transitions, 225 flow [2023-11-17 11:35:36,935 INFO L124 PetriNetUnfolderBase]: 38/184 cut-off events. [2023-11-17 11:35:36,935 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:35:36,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 184 events. 38/184 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 780 event pairs, 1 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 132. Up to 12 conditions per place. [2023-11-17 11:35:36,940 INFO L119 LiptonReduction]: Number of co-enabled transitions 6762 [2023-11-17 11:35:37,835 INFO L134 LiptonReduction]: Checked pairs total: 16531 [2023-11-17 11:35:37,836 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-11-17 11:35:37,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:37,845 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;@1cd0ab81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:37,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:37,849 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:37,850 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:35:37,850 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:37,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:37,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:37,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:37,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash 18854563, now seen corresponding path program 1 times [2023-11-17 11:35:37,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:37,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310727681] [2023-11-17 11:35:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:37,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:37,876 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 11:35:37,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:37,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310727681] [2023-11-17 11:35:37,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310727681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:37,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:37,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:37,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808293657] [2023-11-17 11:35:37,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:37,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:37,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:37,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 165 [2023-11-17 11:35:37,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 67 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 11:35:37,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:37,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 165 [2023-11-17 11:35:37,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:40,696 INFO L124 PetriNetUnfolderBase]: 23815/33875 cut-off events. [2023-11-17 11:35:40,697 INFO L125 PetriNetUnfolderBase]: For 1031/1031 co-relation queries the response was YES. [2023-11-17 11:35:40,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68173 conditions, 33875 events. 23815/33875 cut-off events. For 1031/1031 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 198965 event pairs, 22652 based on Foata normal form. 3053/34181 useless extension candidates. Maximal degree in co-relation 26598. Up to 33630 conditions per place. [2023-11-17 11:35:40,842 INFO L140 encePairwiseOnDemand]: 141/165 looper letters, 41 selfloop transitions, 2 changer transitions 9/56 dead transitions. [2023-11-17 11:35:40,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 243 flow [2023-11-17 11:35:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:35:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:35:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-11-17 11:35:40,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34949494949494947 [2023-11-17 11:35:40,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-11-17 11:35:40,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-11-17 11:35:40,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:40,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-11-17 11:35:40,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 11:35:40,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 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 11:35:40,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 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 11:35:40,847 INFO L175 Difference]: Start difference. First operand has 50 places, 67 transitions, 161 flow. Second operand 3 states and 173 transitions. [2023-11-17 11:35:40,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 243 flow [2023-11-17 11:35:40,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:35:40,850 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 104 flow [2023-11-17 11:35:40,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-11-17 11:35:40,851 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-17 11:35:40,851 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 104 flow [2023-11-17 11:35:40,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 11:35:40,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:40,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:35:40,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:35:40,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:40,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash -114247960, now seen corresponding path program 1 times [2023-11-17 11:35:40,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:40,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640933323] [2023-11-17 11:35:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:40,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:40,889 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 11:35:40,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:40,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640933323] [2023-11-17 11:35:40,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640933323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:35:40,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38947174] [2023-11-17 11:35:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:40,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:35:40,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:35:40,891 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 11:35:40,924 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 11:35:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:40,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:35:40,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:35:40,996 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 11:35:40,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:35:41,013 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 11:35:41,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38947174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:35:41,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:35:41,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:35:41,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621818784] [2023-11-17 11:35:41,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:35:41,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:35:41,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:41,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:35:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:35:41,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 165 [2023-11-17 11:35:41,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 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 11:35:41,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:41,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 165 [2023-11-17 11:35:41,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:35:41,832 INFO L124 PetriNetUnfolderBase]: 5560/8266 cut-off events. [2023-11-17 11:35:41,832 INFO L125 PetriNetUnfolderBase]: For 2060/2060 co-relation queries the response was YES. [2023-11-17 11:35:41,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17474 conditions, 8266 events. 5560/8266 cut-off events. For 2060/2060 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 44259 event pairs, 637 based on Foata normal form. 819/9084 useless extension candidates. Maximal degree in co-relation 15411. Up to 5346 conditions per place. [2023-11-17 11:35:41,879 INFO L140 encePairwiseOnDemand]: 162/165 looper letters, 79 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-11-17 11:35:41,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 87 transitions, 368 flow [2023-11-17 11:35:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:35:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:35:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 272 transitions. [2023-11-17 11:35:41,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27474747474747474 [2023-11-17 11:35:41,882 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 272 transitions. [2023-11-17 11:35:41,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 272 transitions. [2023-11-17 11:35:41,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:35:41,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 272 transitions. [2023-11-17 11:35:41,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 45.333333333333336) internal successors, (272), 6 states have internal predecessors, (272), 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 11:35:41,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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 11:35:41,887 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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 11:35:41,887 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 104 flow. Second operand 6 states and 272 transitions. [2023-11-17 11:35:41,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 87 transitions, 368 flow [2023-11-17 11:35:41,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 364 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:35:41,893 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 104 flow [2023-11-17 11:35:41,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-11-17 11:35:41,895 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-11-17 11:35:41,898 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 104 flow [2023-11-17 11:35:41,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.285714285714285) internal successors, (233), 7 states have internal predecessors, (233), 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 11:35:41,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:41,899 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:35:41,908 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 11:35:42,104 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 11:35:42,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:42,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1372332562, now seen corresponding path program 1 times [2023-11-17 11:35:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:42,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362118857] [2023-11-17 11:35:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:42,122 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:35:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:35:42,149 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:35:42,150 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:35:42,150 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:35:42,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:35:42,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:35:42,151 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:35:42,152 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:35:42,152 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:35:42,189 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:35:42,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:42,231 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2023-11-17 11:35:42,231 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:35:42,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 271 events. 60/271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1234 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 208. Up to 32 conditions per place. [2023-11-17 11:35:42,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:42,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:42,235 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:35:42,235 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:42,236 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:42,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 124 transitions, 288 flow [2023-11-17 11:35:42,256 INFO L124 PetriNetUnfolderBase]: 60/271 cut-off events. [2023-11-17 11:35:42,256 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:35:42,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 271 events. 60/271 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1234 event pairs, 6 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 208. Up to 32 conditions per place. [2023-11-17 11:35:42,266 INFO L119 LiptonReduction]: Number of co-enabled transitions 11408 [2023-11-17 11:35:43,465 INFO L134 LiptonReduction]: Checked pairs total: 28288 [2023-11-17 11:35:43,465 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-11-17 11:35:43,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:43,467 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;@1cd0ab81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:43,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:35:43,468 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:43,468 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:35:43,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:43,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:43,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:35:43,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:35:43,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:43,469 INFO L85 PathProgramCache]: Analyzing trace with hash 24731439, now seen corresponding path program 1 times [2023-11-17 11:35:43,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:43,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455556008] [2023-11-17 11:35:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:43,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:43,493 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 11:35:43,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:43,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455556008] [2023-11-17 11:35:43,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455556008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:43,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:43,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520168382] [2023-11-17 11:35:43,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:43,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:43,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:43,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 209 [2023-11-17 11:35:43,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 84 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 11:35:43,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:43,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 209 [2023-11-17 11:35:43,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:08,811 INFO L124 PetriNetUnfolderBase]: 302884/397535 cut-off events. [2023-11-17 11:36:08,812 INFO L125 PetriNetUnfolderBase]: For 15692/15692 co-relation queries the response was YES. [2023-11-17 11:36:09,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800904 conditions, 397535 events. 302884/397535 cut-off events. For 15692/15692 co-relation queries the response was YES. Maximal size of possible extension queue 7050. Compared 2567960 event pairs, 223134 based on Foata normal form. 38508/410248 useless extension candidates. Maximal degree in co-relation 68277. Up to 395355 conditions per place. [2023-11-17 11:36:10,502 INFO L140 encePairwiseOnDemand]: 179/209 looper letters, 50 selfloop transitions, 2 changer transitions 10/67 dead transitions. [2023-11-17 11:36:10,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 298 flow [2023-11-17 11:36:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:36:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:36:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-11-17 11:36:10,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3397129186602871 [2023-11-17 11:36:10,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-11-17 11:36:10,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-11-17 11:36:10,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:10,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-11-17 11:36:10,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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 11:36:10,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 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 11:36:10,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 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 11:36:10,508 INFO L175 Difference]: Start difference. First operand has 62 places, 84 transitions, 208 flow. Second operand 3 states and 213 transitions. [2023-11-17 11:36:10,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 298 flow [2023-11-17 11:36:10,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:36:10,520 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 134 flow [2023-11-17 11:36:10,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2023-11-17 11:36:10,522 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-11-17 11:36:10,522 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 134 flow [2023-11-17 11:36:10,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 11:36:10,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:10,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:10,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:36:10,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:10,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:10,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1940082167, now seen corresponding path program 1 times [2023-11-17 11:36:10,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:10,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877350438] [2023-11-17 11:36:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:10,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:10,564 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 11:36:10,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877350438] [2023-11-17 11:36:10,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877350438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:36:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968544992] [2023-11-17 11:36:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:10,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:36:10,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:36:10,567 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 11:36:10,569 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 11:36:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:10,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:36:10,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:36:10,664 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 11:36:10,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:36:10,678 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 11:36:10,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968544992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:36:10,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:36:10,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:36:10,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583618780] [2023-11-17 11:36:10,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:36:10,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:36:10,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:10,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:36:10,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:36:10,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 209 [2023-11-17 11:36:10,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 41.285714285714285) internal successors, (289), 7 states have internal predecessors, (289), 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 11:36:10,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:10,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 209 [2023-11-17 11:36:10,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:20,540 INFO L124 PetriNetUnfolderBase]: 139696/184468 cut-off events. [2023-11-17 11:36:20,540 INFO L125 PetriNetUnfolderBase]: For 29745/29745 co-relation queries the response was YES. [2023-11-17 11:36:20,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383946 conditions, 184468 events. 139696/184468 cut-off events. For 29745/29745 co-relation queries the response was YES. Maximal size of possible extension queue 3929. Compared 1143851 event pairs, 16738 based on Foata normal form. 819/185277 useless extension candidates. Maximal degree in co-relation 340191. Up to 119557 conditions per place. [2023-11-17 11:36:21,655 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 123 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-11-17 11:36:21,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 134 transitions, 568 flow [2023-11-17 11:36:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:36:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:36:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2023-11-17 11:36:21,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.291866028708134 [2023-11-17 11:36:21,658 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2023-11-17 11:36:21,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2023-11-17 11:36:21,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:21,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2023-11-17 11:36:21,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 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 11:36:21,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 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 11:36:21,661 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 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 11:36:21,661 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 134 flow. Second operand 6 states and 366 transitions. [2023-11-17 11:36:21,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 134 transitions, 568 flow [2023-11-17 11:36:21,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 134 transitions, 560 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 11:36:21,671 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 166 flow [2023-11-17 11:36:21,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2023-11-17 11:36:21,672 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2023-11-17 11:36:21,672 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 166 flow [2023-11-17 11:36:21,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.285714285714285) internal successors, (289), 7 states have internal predecessors, (289), 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 11:36:21,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:21,673 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:21,684 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 11:36:21,877 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 11:36:21,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:21,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:21,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1880126613, now seen corresponding path program 1 times [2023-11-17 11:36:21,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:21,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886288753] [2023-11-17 11:36:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:21,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:21,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:36:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:21,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:36:21,915 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:36:21,915 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:36:21,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:36:21,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:36:21,916 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:36:21,916 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:36:21,916 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:36:21,949 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 11:36:21,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:21,989 INFO L124 PetriNetUnfolderBase]: 102/410 cut-off events. [2023-11-17 11:36:21,989 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:36:21,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 410 events. 102/410 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1972 event pairs, 23 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 321. Up to 80 conditions per place. [2023-11-17 11:36:21,993 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:21,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:21,996 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:36:21,996 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:21,997 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:21,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 353 flow [2023-11-17 11:36:22,031 INFO L124 PetriNetUnfolderBase]: 102/410 cut-off events. [2023-11-17 11:36:22,031 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 11:36:22,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 410 events. 102/410 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1972 event pairs, 23 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 321. Up to 80 conditions per place. [2023-11-17 11:36:22,050 INFO L119 LiptonReduction]: Number of co-enabled transitions 17250 [2023-11-17 11:36:23,678 INFO L134 LiptonReduction]: Checked pairs total: 43525 [2023-11-17 11:36:23,678 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-11-17 11:36:23,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:36:23,683 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;@1cd0ab81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:36:23,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:36:23,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:36:23,685 INFO L124 PetriNetUnfolderBase]: 3/11 cut-off events. [2023-11-17 11:36:23,685 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:36:23,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:23,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:36:23,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:36:23,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:23,685 INFO L85 PathProgramCache]: Analyzing trace with hash 31969520, now seen corresponding path program 1 times [2023-11-17 11:36:23,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:23,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560326302] [2023-11-17 11:36:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:23,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:23,722 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 11:36:23,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:23,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560326302] [2023-11-17 11:36:23,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560326302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:36:23,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:36:23,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:36:23,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061832663] [2023-11-17 11:36:23,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:36:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:36:23,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:36:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:36:23,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 249 [2023-11-17 11:36:23,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 101 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 11:36:23,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:23,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 249 [2023-11-17 11:36:23,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand