/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_61-invariant_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:40:36,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:40:36,386 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 11:40:36,419 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:40:36,420 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:40:36,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:40:36,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:40:36,426 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:40:36,427 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:40:36,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:40:36,433 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:40:36,433 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:40:36,433 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:40:36,435 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:40:36,435 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:40:36,435 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:40:36,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:40:36,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:40:36,435 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:40:36,436 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:40:36,436 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:40:36,437 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:40:36,437 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:40:36,437 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:40:36,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:40:36,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:36,438 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:40:36,438 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:40:36,438 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:40:36,438 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:40:36,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:40:36,439 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:40:36,440 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:40:36,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:40:36,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:40:36,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:40:36,685 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:40:36,685 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:40:36,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-17 11:40:37,897 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:40:38,117 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:40:38,118 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-17 11:40:38,138 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115343ebf/4ff9eeb50d84403eaf657d1e31b44777/FLAG9f3700328 [2023-11-17 11:40:38,150 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115343ebf/4ff9eeb50d84403eaf657d1e31b44777 [2023-11-17 11:40:38,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:40:38,153 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:40:38,154 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:38,154 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:40:38,158 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:40:38,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108558f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38, skipping insertion in model container [2023-11-17 11:40:38,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,203 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:40:38,483 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_61-invariant_racing.i[30176,30189] [2023-11-17 11:40:38,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:38,518 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:40:38,562 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_61-invariant_racing.i[30176,30189] [2023-11-17 11:40:38,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:38,611 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:40:38,613 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38 WrapperNode [2023-11-17 11:40:38,613 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:38,614 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:38,614 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:40:38,614 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:40:38,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,643 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,664 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2023-11-17 11:40:38,664 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:38,665 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:40:38,665 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:40:38,665 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:40:38,683 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,683 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,690 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,701 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,705 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:40:38,706 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:40:38,706 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:40:38,706 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:40:38,706 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (1/1) ... [2023-11-17 11:40:38,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:38,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:38,733 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 11:40:38,752 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 11:40:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:40:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:40:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:40:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:40:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:40:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:40:38,766 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:40:38,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:40:38,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:40:38,767 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:40:38,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:40:38,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:40:38,768 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 11:40:38,871 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:40:38,873 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:40:39,138 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:40:39,279 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:40:39,279 INFO L307 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-17 11:40:39,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:39 BoogieIcfgContainer [2023-11-17 11:40:39,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:40:39,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:40:39,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:40:39,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:40:39,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:40:38" (1/3) ... [2023-11-17 11:40:39,286 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec56f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:39, skipping insertion in model container [2023-11-17 11:40:39,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:38" (2/3) ... [2023-11-17 11:40:39,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec56f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:39, skipping insertion in model container [2023-11-17 11:40:39,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:39" (3/3) ... [2023-11-17 11:40:39,288 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-11-17 11:40:39,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:40:39,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:40:39,304 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:40:39,355 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:40:39,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 78 transitions, 163 flow [2023-11-17 11:40:39,441 INFO L124 PetriNetUnfolderBase]: 26/116 cut-off events. [2023-11-17 11:40:39,441 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:40:39,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 116 events. 26/116 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 398 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-11-17 11:40:39,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 78 transitions, 163 flow [2023-11-17 11:40:39,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 76 transitions, 156 flow [2023-11-17 11:40:39,463 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:39,481 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 76 transitions, 156 flow [2023-11-17 11:40:39,487 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 76 transitions, 156 flow [2023-11-17 11:40:39,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 76 transitions, 156 flow [2023-11-17 11:40:39,516 INFO L124 PetriNetUnfolderBase]: 25/114 cut-off events. [2023-11-17 11:40:39,517 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:39,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 114 events. 25/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 383 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-11-17 11:40:39,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 2720 [2023-11-17 11:40:40,333 INFO L134 LiptonReduction]: Checked pairs total: 7885 [2023-11-17 11:40:40,334 INFO L136 LiptonReduction]: Total number of compositions: 53 [2023-11-17 11:40:40,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:40,352 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;@51d4b9ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:40,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:40:40,357 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:40,357 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2023-11-17 11:40:40,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:40,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:40,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:40:40,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 395606046, now seen corresponding path program 1 times [2023-11-17 11:40:40,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:40,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839942300] [2023-11-17 11:40:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:40,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:40,567 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 11:40:40,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:40,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839942300] [2023-11-17 11:40:40,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839942300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:40,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:40,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255256546] [2023-11-17 11:40:40,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:40,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:40,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:40,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:40,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 131 [2023-11-17 11:40:40,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 51 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 11:40:40,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:40,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 131 [2023-11-17 11:40:40,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:40,733 INFO L124 PetriNetUnfolderBase]: 241/529 cut-off events. [2023-11-17 11:40:40,733 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:40,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 529 events. 241/529 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2293 event pairs, 0 based on Foata normal form. 32/514 useless extension candidates. Maximal degree in co-relation 1006. Up to 481 conditions per place. [2023-11-17 11:40:40,738 INFO L140 encePairwiseOnDemand]: 113/131 looper letters, 43 selfloop transitions, 2 changer transitions 4/52 dead transitions. [2023-11-17 11:40:40,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 52 transitions, 206 flow [2023-11-17 11:40:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-11-17 11:40:40,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944020356234097 [2023-11-17 11:40:40,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-11-17 11:40:40,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-11-17 11:40:40,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:40,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-11-17 11:40:40,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 11:40:40,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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 11:40:40,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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 11:40:40,760 INFO L175 Difference]: Start difference. First operand has 39 places, 51 transitions, 106 flow. Second operand 3 states and 155 transitions. [2023-11-17 11:40:40,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 52 transitions, 206 flow [2023-11-17 11:40:40,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:40,764 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 76 flow [2023-11-17 11:40:40,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-11-17 11:40:40,769 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-11-17 11:40:40,769 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 76 flow [2023-11-17 11:40:40,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 11:40:40,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:40,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:40:40,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:40:40,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:40,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:40,771 INFO L85 PathProgramCache]: Analyzing trace with hash -622896217, now seen corresponding path program 1 times [2023-11-17 11:40:40,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:40,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547081353] [2023-11-17 11:40:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:40,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:40,792 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:40,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:40,820 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:40,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:40:40,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:40:40,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:40:40,823 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:40:40,825 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:40,825 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:40:40,844 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:40:40,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 114 transitions, 244 flow [2023-11-17 11:40:40,862 INFO L124 PetriNetUnfolderBase]: 44/197 cut-off events. [2023-11-17 11:40:40,863 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-17 11:40:40,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 197 events. 44/197 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 853 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 120. Up to 9 conditions per place. [2023-11-17 11:40:40,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 114 transitions, 244 flow [2023-11-17 11:40:40,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 114 transitions, 244 flow [2023-11-17 11:40:40,866 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:40,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 114 transitions, 244 flow [2023-11-17 11:40:40,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 114 transitions, 244 flow [2023-11-17 11:40:40,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 114 transitions, 244 flow [2023-11-17 11:40:40,882 INFO L124 PetriNetUnfolderBase]: 44/197 cut-off events. [2023-11-17 11:40:40,882 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-17 11:40:40,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 197 events. 44/197 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 853 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 120. Up to 9 conditions per place. [2023-11-17 11:40:40,889 INFO L119 LiptonReduction]: Number of co-enabled transitions 8092 [2023-11-17 11:40:41,868 INFO L134 LiptonReduction]: Checked pairs total: 21884 [2023-11-17 11:40:41,869 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-11-17 11:40:41,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:41,875 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;@51d4b9ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:41,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:40:41,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:41,879 INFO L124 PetriNetUnfolderBase]: 7/28 cut-off events. [2023-11-17 11:40:41,879 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:40:41,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:41,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:40:41,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:41,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash 555016357, now seen corresponding path program 1 times [2023-11-17 11:40:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:41,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735763540] [2023-11-17 11:40:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:41,948 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 11:40:41,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:41,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735763540] [2023-11-17 11:40:41,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735763540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:41,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:41,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:41,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88539647] [2023-11-17 11:40:41,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:41,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:41,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:41,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:41,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 185 [2023-11-17 11:40:41,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 78 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 11:40:41,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:41,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 185 [2023-11-17 11:40:41,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:42,995 INFO L124 PetriNetUnfolderBase]: 7147/11142 cut-off events. [2023-11-17 11:40:42,996 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-17 11:40:43,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22187 conditions, 11142 events. 7147/11142 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 65923 event pairs, 3150 based on Foata normal form. 735/10985 useless extension candidates. Maximal degree in co-relation 2151. Up to 10955 conditions per place. [2023-11-17 11:40:43,051 INFO L140 encePairwiseOnDemand]: 161/185 looper letters, 56 selfloop transitions, 2 changer transitions 8/72 dead transitions. [2023-11-17 11:40:43,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 292 flow [2023-11-17 11:40:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2023-11-17 11:40:43,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4018018018018018 [2023-11-17 11:40:43,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2023-11-17 11:40:43,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2023-11-17 11:40:43,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:43,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2023-11-17 11:40:43,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 11:40:43,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 11:40:43,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 11:40:43,063 INFO L175 Difference]: Start difference. First operand has 58 places, 78 transitions, 172 flow. Second operand 3 states and 223 transitions. [2023-11-17 11:40:43,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 292 flow [2023-11-17 11:40:43,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 292 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:43,067 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 120 flow [2023-11-17 11:40:43,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=58, 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=120, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-11-17 11:40:43,068 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-17 11:40:43,068 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 120 flow [2023-11-17 11:40:43,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 11:40:43,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:43,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:40:43,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:40:43,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:43,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:43,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1706635828, now seen corresponding path program 1 times [2023-11-17 11:40:43,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:43,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744505562] [2023-11-17 11:40:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:43,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:43,104 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:43,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:43,132 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:43,132 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:40:43,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:40:43,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:40:43,135 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:40:43,135 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:43,136 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:40:43,162 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:40:43,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 150 transitions, 327 flow [2023-11-17 11:40:43,189 INFO L124 PetriNetUnfolderBase]: 65/289 cut-off events. [2023-11-17 11:40:43,189 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-17 11:40:43,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 289 events. 65/289 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1398 event pairs, 1 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 208. Up to 12 conditions per place. [2023-11-17 11:40:43,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 150 transitions, 327 flow [2023-11-17 11:40:43,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 150 transitions, 327 flow [2023-11-17 11:40:43,193 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:43,193 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 150 transitions, 327 flow [2023-11-17 11:40:43,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 150 transitions, 327 flow [2023-11-17 11:40:43,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 150 transitions, 327 flow [2023-11-17 11:40:43,216 INFO L124 PetriNetUnfolderBase]: 65/289 cut-off events. [2023-11-17 11:40:43,216 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-17 11:40:43,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 289 events. 65/289 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1398 event pairs, 1 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 208. Up to 12 conditions per place. [2023-11-17 11:40:43,228 INFO L119 LiptonReduction]: Number of co-enabled transitions 15912 [2023-11-17 11:40:44,477 INFO L134 LiptonReduction]: Checked pairs total: 44338 [2023-11-17 11:40:44,478 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-11-17 11:40:44,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:44,482 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;@51d4b9ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:44,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:40:44,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:44,486 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-11-17 11:40:44,486 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:40:44,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:44,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:40:44,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:44,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash 765964900, now seen corresponding path program 1 times [2023-11-17 11:40:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:44,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026919010] [2023-11-17 11:40:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:44,533 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 11:40:44,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:44,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026919010] [2023-11-17 11:40:44,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026919010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:44,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809416829] [2023-11-17 11:40:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:44,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 244 [2023-11-17 11:40:44,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 102 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 11:40:44,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:44,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 244 [2023-11-17 11:40:44,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:58,765 INFO L124 PetriNetUnfolderBase]: 167378/230452 cut-off events. [2023-11-17 11:40:58,766 INFO L125 PetriNetUnfolderBase]: For 2294/2294 co-relation queries the response was YES. [2023-11-17 11:40:59,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458374 conditions, 230452 events. 167378/230452 cut-off events. For 2294/2294 co-relation queries the response was YES. Maximal size of possible extension queue 3852. Compared 1565391 event pairs, 101105 based on Foata normal form. 15056/225942 useless extension candidates. Maximal degree in co-relation 30866. Up to 226249 conditions per place. [2023-11-17 11:40:59,827 INFO L140 encePairwiseOnDemand]: 214/244 looper letters, 74 selfloop transitions, 2 changer transitions 9/92 dead transitions. [2023-11-17 11:40:59,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 381 flow [2023-11-17 11:40:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-11-17 11:40:59,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40027322404371585 [2023-11-17 11:40:59,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-11-17 11:40:59,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-11-17 11:40:59,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:59,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-11-17 11:40:59,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:59,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 11:40:59,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 11:40:59,834 INFO L175 Difference]: Start difference. First operand has 76 places, 102 transitions, 231 flow. Second operand 3 states and 293 transitions. [2023-11-17 11:40:59,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 381 flow [2023-11-17 11:40:59,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 92 transitions, 381 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:59,840 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 162 flow [2023-11-17 11:40:59,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2023-11-17 11:40:59,841 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2023-11-17 11:40:59,841 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 162 flow [2023-11-17 11:40:59,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 11:40:59,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:59,846 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:40:59,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:40:59,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:40:59,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:59,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1139863418, now seen corresponding path program 1 times [2023-11-17 11:40:59,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:59,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304853557] [2023-11-17 11:40:59,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:59,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:59,875 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:59,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:59,903 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:59,904 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:40:59,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:40:59,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:40:59,904 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:40:59,905 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:59,905 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:40:59,943 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:40:59,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 186 transitions, 412 flow [2023-11-17 11:40:59,998 INFO L124 PetriNetUnfolderBase]: 94/405 cut-off events. [2023-11-17 11:40:59,999 INFO L125 PetriNetUnfolderBase]: For 48/54 co-relation queries the response was YES. [2023-11-17 11:41:00,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 405 events. 94/405 cut-off events. For 48/54 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2070 event pairs, 6 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 313. Up to 32 conditions per place. [2023-11-17 11:41:00,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 186 transitions, 412 flow [2023-11-17 11:41:00,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 186 transitions, 412 flow [2023-11-17 11:41:00,012 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:41:00,013 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 186 transitions, 412 flow [2023-11-17 11:41:00,013 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 186 transitions, 412 flow [2023-11-17 11:41:00,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 186 transitions, 412 flow [2023-11-17 11:41:00,058 INFO L124 PetriNetUnfolderBase]: 94/405 cut-off events. [2023-11-17 11:41:00,059 INFO L125 PetriNetUnfolderBase]: For 48/54 co-relation queries the response was YES. [2023-11-17 11:41:00,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 405 events. 94/405 cut-off events. For 48/54 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2070 event pairs, 6 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 313. Up to 32 conditions per place. [2023-11-17 11:41:00,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 26248 [2023-11-17 11:41:02,015 INFO L134 LiptonReduction]: Checked pairs total: 73628 [2023-11-17 11:41:02,015 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-11-17 11:41:02,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:41:02,020 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;@51d4b9ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:41:02,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:41:02,024 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:41:02,024 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-11-17 11:41:02,024 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:41:02,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:02,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:41:02,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:41:02,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:02,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1033214554, now seen corresponding path program 1 times [2023-11-17 11:41:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:02,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509565438] [2023-11-17 11:41:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:02,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:02,059 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 11:41:02,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:02,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509565438] [2023-11-17 11:41:02,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509565438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:02,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:02,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:02,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984466484] [2023-11-17 11:41:02,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:02,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:02,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:02,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:02,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:02,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 299 [2023-11-17 11:41:02,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 126 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 11:41:02,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:02,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 299 [2023-11-17 11:41:02,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand