/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/pthread-ext/14_spin2003-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:19:28,289 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:19:28,344 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 11:19:28,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:19:28,376 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:19:28,376 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:19:28,377 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:19:28,377 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:19:28,377 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:19:28,377 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:19:28,378 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:19:28,378 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:19:28,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:19:28,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:19:28,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:19:28,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:19:28,379 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:19:28,379 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:19:28,379 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:19:28,380 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:19:28,380 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:19:28,380 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:19:28,381 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:19:28,381 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:19:28,381 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:19:28,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:19:28,381 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:19:28,381 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:19:28,382 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:19:28,382 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:19:28,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:19:28,382 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:19:28,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:19:28,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:19:28,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:19:28,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:19:28,586 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:19:28,587 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:19:28,587 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i [2023-11-17 11:19:29,716 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:19:29,968 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:19:29,982 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i [2023-11-17 11:19:29,998 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6c68e67/cea828696a694e508e3a154c2d933989/FLAGc8af3b761 [2023-11-17 11:19:30,016 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6c68e67/cea828696a694e508e3a154c2d933989 [2023-11-17 11:19:30,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:19:30,020 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:19:30,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:19:30,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:19:30,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:19:30,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c4d57cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30, skipping insertion in model container [2023-11-17 11:19:30,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,078 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:19:30,316 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i[30427,30440] [2023-11-17 11:19:30,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:19:30,334 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:19:30,381 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i[30427,30440] [2023-11-17 11:19:30,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:19:30,408 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:19:30,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30 WrapperNode [2023-11-17 11:19:30,409 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:19:30,409 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:19:30,409 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:19:30,410 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:19:30,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,426 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,438 INFO L138 Inliner]: procedures = 162, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2023-11-17 11:19:30,439 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:19:30,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:19:30,439 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:19:30,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:19:30,445 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,452 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,454 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,455 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:19:30,456 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:19:30,456 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:19:30,456 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:19:30,457 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (1/1) ... [2023-11-17 11:19:30,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:19:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:19:30,492 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 11:19:30,498 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 11:19:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:19:30,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:19:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:19:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:19:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:19:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:19:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:19:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:19:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:19:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:19:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:19:30,518 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 11:19:30,646 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:19:30,648 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:19:30,746 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:19:30,808 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:19:30,808 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 11:19:30,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:19:30 BoogieIcfgContainer [2023-11-17 11:19:30,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:19:30,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:19:30,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:19:30,813 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:19:30,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:19:30" (1/3) ... [2023-11-17 11:19:30,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241eee21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:19:30, skipping insertion in model container [2023-11-17 11:19:30,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:19:30" (2/3) ... [2023-11-17 11:19:30,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241eee21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:19:30, skipping insertion in model container [2023-11-17 11:19:30,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:19:30" (3/3) ... [2023-11-17 11:19:30,815 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003-pthread.i [2023-11-17 11:19:30,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:19:30,828 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:19:30,828 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:19:30,849 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:30,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:30,930 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-17 11:19:30,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:30,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 17 events. 1/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-11-17 11:19:30,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:30,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:30,938 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:30,947 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:30,951 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:30,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 17 places, 15 transitions, 34 flow [2023-11-17 11:19:30,958 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-17 11:19:30,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:30,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 17 events. 1/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2023-11-17 11:19:30,959 INFO L119 LiptonReduction]: Number of co-enabled transitions 72 [2023-11-17 11:19:31,216 INFO L134 LiptonReduction]: Checked pairs total: 104 [2023-11-17 11:19:31,216 INFO L136 LiptonReduction]: Total number of compositions: 13 [2023-11-17 11:19:31,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:31,240 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;@68257cd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:31,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:19:31,243 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:31,244 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:19:31,244 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:31,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:31,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:31,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:19:31,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash 4393826, now seen corresponding path program 1 times [2023-11-17 11:19:31,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:31,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691578479] [2023-11-17 11:19:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:31,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:31,423 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 11:19:31,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:31,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691578479] [2023-11-17 11:19:31,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691578479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:31,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:31,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:31,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844914462] [2023-11-17 11:19:31,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:31,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:31,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:31,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2023-11-17 11:19:31,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 11:19:31,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:31,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2023-11-17 11:19:31,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:31,472 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:19:31,472 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:31,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-17 11:19:31,474 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-17 11:19:31,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-17 11:19:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 17 transitions. [2023-11-17 11:19:31,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30357142857142855 [2023-11-17 11:19:31,483 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 17 transitions. [2023-11-17 11:19:31,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 17 transitions. [2023-11-17 11:19:31,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:31,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 17 transitions. [2023-11-17 11:19:31,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 11:19:31,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 11:19:31,491 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 11:19:31,492 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 2 states and 17 transitions. [2023-11-17 11:19:31,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-17 11:19:31,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:31,496 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-17 11:19:31,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-17 11:19:31,501 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-11-17 11:19:31,502 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-17 11:19:31,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 11:19:31,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:31,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:19:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:19:31,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:19:31,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:31,505 INFO L85 PathProgramCache]: Analyzing trace with hash -72524071, now seen corresponding path program 1 times [2023-11-17 11:19:31,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:31,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569844794] [2023-11-17 11:19:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:31,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:31,543 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:31,598 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:31,599 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:31,600 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:19:31,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:19:31,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:19:31,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:19:31,601 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:31,603 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:31,603 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:19:31,620 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:31,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:31,629 INFO L124 PetriNetUnfolderBase]: 2/30 cut-off events. [2023-11-17 11:19:31,629 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:19:31,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 30 events. 2/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 3 conditions per place. [2023-11-17 11:19:31,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:31,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:31,631 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:31,631 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:31,631 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:31,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 25 transitions, 60 flow [2023-11-17 11:19:31,643 INFO L124 PetriNetUnfolderBase]: 2/30 cut-off events. [2023-11-17 11:19:31,643 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:19:31,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 30 events. 2/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 3 conditions per place. [2023-11-17 11:19:31,644 INFO L119 LiptonReduction]: Number of co-enabled transitions 324 [2023-11-17 11:19:32,023 INFO L134 LiptonReduction]: Checked pairs total: 841 [2023-11-17 11:19:32,024 INFO L136 LiptonReduction]: Total number of compositions: 22 [2023-11-17 11:19:32,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:32,032 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;@68257cd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:32,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:19:32,035 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:32,035 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:19:32,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:32,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:32,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:32,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:19:32,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash 5563914, now seen corresponding path program 1 times [2023-11-17 11:19:32,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:32,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420367653] [2023-11-17 11:19:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:32,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:32,067 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 11:19:32,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:32,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420367653] [2023-11-17 11:19:32,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420367653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:32,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:32,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:32,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138484313] [2023-11-17 11:19:32,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:32,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:32,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:32,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2023-11-17 11:19:32,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 15 transitions, 40 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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 11:19:32,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:32,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2023-11-17 11:19:32,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:32,109 INFO L124 PetriNetUnfolderBase]: 34/75 cut-off events. [2023-11-17 11:19:32,109 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 11:19:32,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 75 events. 34/75 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 194 event pairs, 34 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 42. Up to 73 conditions per place. [2023-11-17 11:19:32,112 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 9 selfloop transitions, 0 changer transitions 0/10 dead transitions. [2023-11-17 11:19:32,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 10 transitions, 48 flow [2023-11-17 11:19:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:32,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:32,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2023-11-17 11:19:32,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404255319148936 [2023-11-17 11:19:32,115 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 32 transitions. [2023-11-17 11:19:32,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 32 transitions. [2023-11-17 11:19:32,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:32,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 32 transitions. [2023-11-17 11:19:32,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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 11:19:32,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 11:19:32,119 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 11:19:32,119 INFO L175 Difference]: Start difference. First operand has 18 places, 15 transitions, 40 flow. Second operand 2 states and 32 transitions. [2023-11-17 11:19:32,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 10 transitions, 48 flow [2023-11-17 11:19:32,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 48 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:32,120 INFO L231 Difference]: Finished difference. Result has 16 places, 10 transitions, 30 flow [2023-11-17 11:19:32,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=30, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2023-11-17 11:19:32,120 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -2 predicate places. [2023-11-17 11:19:32,121 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 30 flow [2023-11-17 11:19:32,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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 11:19:32,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:32,121 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:19:32,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:19:32,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:19:32,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:32,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1530045457, now seen corresponding path program 1 times [2023-11-17 11:19:32,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:32,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457233033] [2023-11-17 11:19:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:32,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:32,157 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:32,167 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:32,167 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:32,167 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:19:32,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:19:32,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:19:32,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:19:32,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:19:32,168 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:32,169 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:32,169 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:19:32,189 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:32,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:32,204 INFO L124 PetriNetUnfolderBase]: 3/43 cut-off events. [2023-11-17 11:19:32,204 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:19:32,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 3/43 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 4 conditions per place. [2023-11-17 11:19:32,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:32,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:32,206 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:32,207 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:32,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:32,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 88 flow [2023-11-17 11:19:32,219 INFO L124 PetriNetUnfolderBase]: 3/43 cut-off events. [2023-11-17 11:19:32,219 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:19:32,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 3/43 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 37. Up to 4 conditions per place. [2023-11-17 11:19:32,220 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2023-11-17 11:19:32,686 INFO L134 LiptonReduction]: Checked pairs total: 2231 [2023-11-17 11:19:32,686 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-11-17 11:19:32,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:32,688 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;@68257cd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:32,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:19:32,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:32,690 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:19:32,690 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:32,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:32,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:32,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:32,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:32,690 INFO L85 PathProgramCache]: Analyzing trace with hash 7318898, now seen corresponding path program 1 times [2023-11-17 11:19:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:32,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111221943] [2023-11-17 11:19:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:32,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:32,702 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 11:19:32,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:32,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111221943] [2023-11-17 11:19:32,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111221943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:32,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:32,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:32,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190129384] [2023-11-17 11:19:32,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:32,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:32,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:32,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:32,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:32,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 70 [2023-11-17 11:19:32,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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 11:19:32,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:32,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 70 [2023-11-17 11:19:32,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:32,760 INFO L124 PetriNetUnfolderBase]: 178/306 cut-off events. [2023-11-17 11:19:32,760 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 11:19:32,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 306 events. 178/306 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1035 event pairs, 178 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 162. Up to 298 conditions per place. [2023-11-17 11:19:32,762 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 12 selfloop transitions, 0 changer transitions 0/13 dead transitions. [2023-11-17 11:19:32,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 68 flow [2023-11-17 11:19:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:32,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 45 transitions. [2023-11-17 11:19:32,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2023-11-17 11:19:32,765 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 45 transitions. [2023-11-17 11:19:32,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 45 transitions. [2023-11-17 11:19:32,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:32,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 45 transitions. [2023-11-17 11:19:32,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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 11:19:32,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 11:19:32,766 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 11:19:32,767 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 58 flow. Second operand 2 states and 45 transitions. [2023-11-17 11:19:32,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 68 flow [2023-11-17 11:19:32,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 13 transitions, 66 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:32,769 INFO L231 Difference]: Finished difference. Result has 21 places, 13 transitions, 42 flow [2023-11-17 11:19:32,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=21, PETRI_TRANSITIONS=13} [2023-11-17 11:19:32,772 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-11-17 11:19:32,773 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 13 transitions, 42 flow [2023-11-17 11:19:32,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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 11:19:32,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:32,776 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:19:32,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:19:32,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:19:32,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -825214120, now seen corresponding path program 1 times [2023-11-17 11:19:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:32,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702714153] [2023-11-17 11:19:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:32,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:32,811 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:32,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:32,820 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:32,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:19:32,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:19:32,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:19:32,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:19:32,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:19:32,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:19:32,821 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:32,822 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:32,822 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:19:32,832 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:32,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:32,837 INFO L124 PetriNetUnfolderBase]: 4/56 cut-off events. [2023-11-17 11:19:32,837 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:32,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 56 events. 4/56 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2023-11-17 11:19:32,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:32,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:32,838 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:32,838 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:32,838 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:32,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 45 transitions, 118 flow [2023-11-17 11:19:32,843 INFO L124 PetriNetUnfolderBase]: 4/56 cut-off events. [2023-11-17 11:19:32,843 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:19:32,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 56 events. 4/56 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 55. Up to 5 conditions per place. [2023-11-17 11:19:32,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 1368 [2023-11-17 11:19:33,554 INFO L134 LiptonReduction]: Checked pairs total: 3962 [2023-11-17 11:19:33,554 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-11-17 11:19:33,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:33,556 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;@68257cd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:33,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:19:33,557 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:33,557 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:19:33,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:33,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:33,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:33,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:33,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash 9781921, now seen corresponding path program 1 times [2023-11-17 11:19:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:33,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467982337] [2023-11-17 11:19:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:33,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:33,569 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 11:19:33,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:33,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467982337] [2023-11-17 11:19:33,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467982337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:33,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:33,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:33,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601112345] [2023-11-17 11:19:33,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:33,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:33,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:33,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:33,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:33,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 92 [2023-11-17 11:19:33,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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 11:19:33,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:33,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 92 [2023-11-17 11:19:33,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:33,659 INFO L124 PetriNetUnfolderBase]: 772/1161 cut-off events. [2023-11-17 11:19:33,659 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-11-17 11:19:33,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 1161 events. 772/1161 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4541 event pairs, 772 based on Foata normal form. 0/1161 useless extension candidates. Maximal degree in co-relation 663. Up to 1135 conditions per place. [2023-11-17 11:19:33,666 INFO L140 encePairwiseOnDemand]: 83/92 looper letters, 15 selfloop transitions, 0 changer transitions 0/16 dead transitions. [2023-11-17 11:19:33,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 16 transitions, 90 flow [2023-11-17 11:19:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 58 transitions. [2023-11-17 11:19:33,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31521739130434784 [2023-11-17 11:19:33,667 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 58 transitions. [2023-11-17 11:19:33,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 58 transitions. [2023-11-17 11:19:33,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:33,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 58 transitions. [2023-11-17 11:19:33,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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 11:19:33,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 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 11:19:33,668 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 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 11:19:33,668 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 78 flow. Second operand 2 states and 58 transitions. [2023-11-17 11:19:33,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 16 transitions, 90 flow [2023-11-17 11:19:33,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 16 transitions, 84 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:33,670 INFO L231 Difference]: Finished difference. Result has 26 places, 16 transitions, 54 flow [2023-11-17 11:19:33,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=16} [2023-11-17 11:19:33,671 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-11-17 11:19:33,671 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 16 transitions, 54 flow [2023-11-17 11:19:33,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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 11:19:33,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:33,671 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:33,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:19:33,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:19:33,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:33,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1224744523, now seen corresponding path program 1 times [2023-11-17 11:19:33,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:33,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617196615] [2023-11-17 11:19:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:33,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:33,682 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:33,691 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:33,691 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:33,692 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:19:33,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:19:33,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:19:33,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:19:33,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:19:33,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:19:33,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:19:33,692 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:33,693 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:33,693 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:19:33,704 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:33,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:33,710 INFO L124 PetriNetUnfolderBase]: 5/69 cut-off events. [2023-11-17 11:19:33,710 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:19:33,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 69 events. 5/69 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 74. Up to 6 conditions per place. [2023-11-17 11:19:33,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:33,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:33,711 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:33,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:33,711 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:33,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 55 transitions, 150 flow [2023-11-17 11:19:33,716 INFO L124 PetriNetUnfolderBase]: 5/69 cut-off events. [2023-11-17 11:19:33,716 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:19:33,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 69 events. 5/69 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 74. Up to 6 conditions per place. [2023-11-17 11:19:33,717 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-11-17 11:19:34,522 INFO L134 LiptonReduction]: Checked pairs total: 6007 [2023-11-17 11:19:34,522 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-11-17 11:19:34,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:34,524 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;@68257cd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:34,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:19:34,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:34,525 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 11:19:34,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:34,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:34,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:34,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:19:34,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:34,526 INFO L85 PathProgramCache]: Analyzing trace with hash 12922192, now seen corresponding path program 1 times [2023-11-17 11:19:34,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:34,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058308770] [2023-11-17 11:19:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:34,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:34,536 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 11:19:34,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:34,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058308770] [2023-11-17 11:19:34,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058308770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:34,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:34,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:34,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728831440] [2023-11-17 11:19:34,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:34,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:34,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:34,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 113 [2023-11-17 11:19:34,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 100 flow. Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 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 11:19:34,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:34,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 113 [2023-11-17 11:19:34,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:34,861 INFO L124 PetriNetUnfolderBase]: 3040/4212 cut-off events. [2023-11-17 11:19:34,861 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2023-11-17 11:19:34,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9018 conditions, 4212 events. 3040/4212 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17882 event pairs, 3040 based on Foata normal form. 0/4212 useless extension candidates. Maximal degree in co-relation 2517. Up to 4132 conditions per place. [2023-11-17 11:19:34,881 INFO L140 encePairwiseOnDemand]: 102/113 looper letters, 18 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-11-17 11:19:34,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 19 transitions, 114 flow [2023-11-17 11:19:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2023-11-17 11:19:34,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3141592920353982 [2023-11-17 11:19:34,883 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 71 transitions. [2023-11-17 11:19:34,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 71 transitions. [2023-11-17 11:19:34,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:34,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 71 transitions. [2023-11-17 11:19:34,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 35.5) internal successors, (71), 2 states have internal predecessors, (71), 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 11:19:34,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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 11:19:34,886 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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 11:19:34,886 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 100 flow. Second operand 2 states and 71 transitions. [2023-11-17 11:19:34,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 19 transitions, 114 flow [2023-11-17 11:19:34,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 19 transitions, 102 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:34,889 INFO L231 Difference]: Finished difference. Result has 31 places, 19 transitions, 66 flow [2023-11-17 11:19:34,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=19} [2023-11-17 11:19:34,890 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2023-11-17 11:19:34,890 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 19 transitions, 66 flow [2023-11-17 11:19:34,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 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 11:19:34,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:34,890 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:34,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:19:34,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:19:34,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:34,893 INFO L85 PathProgramCache]: Analyzing trace with hash 165847671, now seen corresponding path program 1 times [2023-11-17 11:19:34,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:34,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640529457] [2023-11-17 11:19:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:34,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:34,907 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:34,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:34,924 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:34,924 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 11:19:34,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:19:34,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 11:19:34,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 11:19:34,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 11:19:34,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 11:19:34,925 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:19:34,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:19:34,925 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:34,925 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:34,925 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 11:19:34,945 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:34,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:34,951 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-11-17 11:19:34,951 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:19:34,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 82 events. 6/82 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 94. Up to 7 conditions per place. [2023-11-17 11:19:34,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:34,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:34,952 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:34,952 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:34,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:34,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 65 transitions, 184 flow [2023-11-17 11:19:34,957 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-11-17 11:19:34,957 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:19:34,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 82 events. 6/82 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 94. Up to 7 conditions per place. [2023-11-17 11:19:34,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 3132 [2023-11-17 11:19:36,062 INFO L134 LiptonReduction]: Checked pairs total: 8895 [2023-11-17 11:19:36,062 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-11-17 11:19:36,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:36,065 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;@68257cd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:36,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 11:19:36,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:36,067 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 11:19:36,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:36,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:36,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:36,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 11:19:36,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash 16708919, now seen corresponding path program 1 times [2023-11-17 11:19:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:36,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089561036] [2023-11-17 11:19:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:36,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:36,086 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 11:19:36,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089561036] [2023-11-17 11:19:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089561036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:36,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:36,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:36,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060993790] [2023-11-17 11:19:36,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:36,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:36,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:36,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 136 [2023-11-17 11:19:36,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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 11:19:36,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:36,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 136 [2023-11-17 11:19:36,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:37,279 INFO L124 PetriNetUnfolderBase]: 11302/14823 cut-off events. [2023-11-17 11:19:37,279 INFO L125 PetriNetUnfolderBase]: For 9626/9626 co-relation queries the response was YES. [2023-11-17 11:19:37,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31780 conditions, 14823 events. 11302/14823 cut-off events. For 9626/9626 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 66413 event pairs, 11302 based on Foata normal form. 0/14823 useless extension candidates. Maximal degree in co-relation 9132. Up to 14581 conditions per place. [2023-11-17 11:19:37,368 INFO L140 encePairwiseOnDemand]: 123/136 looper letters, 21 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2023-11-17 11:19:37,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 22 transitions, 140 flow [2023-11-17 11:19:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 84 transitions. [2023-11-17 11:19:37,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3088235294117647 [2023-11-17 11:19:37,373 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 84 transitions. [2023-11-17 11:19:37,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 84 transitions. [2023-11-17 11:19:37,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:37,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 84 transitions. [2023-11-17 11:19:37,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 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 11:19:37,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 11:19:37,376 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 11:19:37,376 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 124 flow. Second operand 2 states and 84 transitions. [2023-11-17 11:19:37,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 22 transitions, 140 flow [2023-11-17 11:19:37,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 22 transitions, 120 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:37,384 INFO L231 Difference]: Finished difference. Result has 36 places, 22 transitions, 78 flow [2023-11-17 11:19:37,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=22} [2023-11-17 11:19:37,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-11-17 11:19:37,386 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 78 flow [2023-11-17 11:19:37,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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 11:19:37,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:37,386 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:37,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:19:37,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 11:19:37,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1763472029, now seen corresponding path program 1 times [2023-11-17 11:19:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:37,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832007165] [2023-11-17 11:19:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:37,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:37,406 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:37,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:37,428 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:37,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-17 11:19:37,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-17 11:19:37,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-17 11:19:37,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-17 11:19:37,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-17 11:19:37,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-17 11:19:37,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-17 11:19:37,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-17 11:19:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:19:37,429 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:37,431 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:37,431 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-17 11:19:37,447 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:37,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:37,459 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-17 11:19:37,460 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 11:19:37,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 95 events. 7/95 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 223 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 115. Up to 8 conditions per place. [2023-11-17 11:19:37,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:37,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:37,461 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:37,461 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:37,461 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:37,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 220 flow [2023-11-17 11:19:37,468 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-17 11:19:37,468 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 11:19:37,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 95 events. 7/95 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 223 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 115. Up to 8 conditions per place. [2023-11-17 11:19:37,470 INFO L119 LiptonReduction]: Number of co-enabled transitions 4284 [2023-11-17 11:19:38,644 INFO L134 LiptonReduction]: Checked pairs total: 11816 [2023-11-17 11:19:38,644 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-11-17 11:19:38,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:38,646 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;@68257cd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:38,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 11:19:38,647 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:38,647 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-11-17 11:19:38,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:38,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:38,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:38,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 11:19:38,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash 21203684, now seen corresponding path program 1 times [2023-11-17 11:19:38,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:38,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817790117] [2023-11-17 11:19:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:38,655 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 11:19:38,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:38,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817790117] [2023-11-17 11:19:38,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817790117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:38,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:38,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:38,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191106299] [2023-11-17 11:19:38,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:38,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:38,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 153 [2023-11-17 11:19:38,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 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 11:19:38,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:38,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 153 [2023-11-17 11:19:38,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:42,075 INFO L124 PetriNetUnfolderBase]: 40462/51030 cut-off events. [2023-11-17 11:19:42,076 INFO L125 PetriNetUnfolderBase]: For 40001/40001 co-relation queries the response was YES. [2023-11-17 11:19:42,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109541 conditions, 51030 events. 40462/51030 cut-off events. For 40001/40001 co-relation queries the response was YES. Maximal size of possible extension queue 1465. Compared 237700 event pairs, 40462 based on Foata normal form. 0/51030 useless extension candidates. Maximal degree in co-relation 32136. Up to 50302 conditions per place. [2023-11-17 11:19:42,309 INFO L140 encePairwiseOnDemand]: 138/153 looper letters, 24 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-11-17 11:19:42,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 25 transitions, 168 flow [2023-11-17 11:19:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 97 transitions. [2023-11-17 11:19:42,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31699346405228757 [2023-11-17 11:19:42,310 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 97 transitions. [2023-11-17 11:19:42,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 97 transitions. [2023-11-17 11:19:42,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:42,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 97 transitions. [2023-11-17 11:19:42,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 48.5) internal successors, (97), 2 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 11:19:42,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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 11:19:42,312 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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 11:19:42,312 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 150 flow. Second operand 2 states and 97 transitions. [2023-11-17 11:19:42,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 25 transitions, 168 flow [2023-11-17 11:19:42,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 25 transitions, 138 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:42,333 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 90 flow [2023-11-17 11:19:42,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-11-17 11:19:42,333 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-11-17 11:19:42,334 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 90 flow [2023-11-17 11:19:42,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 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 11:19:42,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:42,334 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:42,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:19:42,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-17 11:19:42,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:42,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1715236374, now seen corresponding path program 1 times [2023-11-17 11:19:42,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:42,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077771053] [2023-11-17 11:19:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:42,350 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:42,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:42,368 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:42,368 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-17 11:19:42,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-17 11:19:42,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-17 11:19:42,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-17 11:19:42,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-17 11:19:42,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-17 11:19:42,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-17 11:19:42,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-17 11:19:42,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-17 11:19:42,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 11:19:42,369 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:42,370 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:42,370 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-17 11:19:42,384 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:42,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:42,391 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-17 11:19:42,391 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 11:19:42,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 108 events. 8/108 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 270 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 137. Up to 9 conditions per place. [2023-11-17 11:19:42,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:42,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:42,392 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:42,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:42,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:42,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 85 transitions, 258 flow [2023-11-17 11:19:42,400 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-17 11:19:42,400 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 11:19:42,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 108 events. 8/108 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 270 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 137. Up to 9 conditions per place. [2023-11-17 11:19:42,403 INFO L119 LiptonReduction]: Number of co-enabled transitions 5616 [2023-11-17 11:19:43,772 INFO L134 LiptonReduction]: Checked pairs total: 15700 [2023-11-17 11:19:43,773 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-11-17 11:19:43,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:43,775 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;@68257cd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:43,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-17 11:19:43,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:43,776 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 11:19:43,776 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:43,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:43,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:43,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-11-17 11:19:43,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:43,777 INFO L85 PathProgramCache]: Analyzing trace with hash 26221766, now seen corresponding path program 1 times [2023-11-17 11:19:43,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:43,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259237996] [2023-11-17 11:19:43,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:43,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:43,789 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 11:19:43,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:43,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259237996] [2023-11-17 11:19:43,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259237996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:43,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:43,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:43,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68914945] [2023-11-17 11:19:43,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:43,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:43,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:43,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 174 [2023-11-17 11:19:43,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 178 flow. Second operand has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 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 11:19:43,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:43,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 174 [2023-11-17 11:19:43,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:19:55,485 INFO L124 PetriNetUnfolderBase]: 141064/172773 cut-off events. [2023-11-17 11:19:55,486 INFO L125 PetriNetUnfolderBase]: For 158828/158828 co-relation queries the response was YES. [2023-11-17 11:19:55,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371253 conditions, 172773 events. 141064/172773 cut-off events. For 158828/158828 co-relation queries the response was YES. Maximal size of possible extension queue 4178. Compared 829415 event pairs, 141064 based on Foata normal form. 0/172773 useless extension candidates. Maximal degree in co-relation 110625. Up to 170587 conditions per place. [2023-11-17 11:19:56,605 INFO L140 encePairwiseOnDemand]: 157/174 looper letters, 27 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-11-17 11:19:56,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 28 transitions, 198 flow [2023-11-17 11:19:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:19:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:19:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 110 transitions. [2023-11-17 11:19:56,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3160919540229885 [2023-11-17 11:19:56,606 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 110 transitions. [2023-11-17 11:19:56,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 110 transitions. [2023-11-17 11:19:56,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:19:56,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 110 transitions. [2023-11-17 11:19:56,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 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 11:19:56,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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 11:19:56,608 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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 11:19:56,608 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 178 flow. Second operand 2 states and 110 transitions. [2023-11-17 11:19:56,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 28 transitions, 198 flow [2023-11-17 11:19:56,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 28 transitions, 156 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-11-17 11:19:56,677 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 102 flow [2023-11-17 11:19:56,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-11-17 11:19:56,677 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-11-17 11:19:56,677 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 102 flow [2023-11-17 11:19:56,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 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 11:19:56,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:56,677 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:19:56,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 11:19:56,678 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-11-17 11:19:56,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash -129524605, now seen corresponding path program 1 times [2023-11-17 11:19:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:56,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936673719] [2023-11-17 11:19:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:56,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:56,695 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:19:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:19:56,711 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:19:56,712 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:19:56,714 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-17 11:19:56,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-11-17 11:19:56,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-11-17 11:19:56,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-11-17 11:19:56,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-11-17 11:19:56,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-11-17 11:19:56,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-11-17 11:19:56,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-11-17 11:19:56,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-11-17 11:19:56,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-11-17 11:19:56,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 11:19:56,715 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:19:56,717 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:19:56,717 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-11-17 11:19:56,735 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:19:56,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:56,744 INFO L124 PetriNetUnfolderBase]: 9/121 cut-off events. [2023-11-17 11:19:56,745 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-17 11:19:56,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 121 events. 9/121 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 296 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 160. Up to 10 conditions per place. [2023-11-17 11:19:56,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:56,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:56,746 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:19:56,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:56,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:56,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 95 transitions, 298 flow [2023-11-17 11:19:56,755 INFO L124 PetriNetUnfolderBase]: 9/121 cut-off events. [2023-11-17 11:19:56,755 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-17 11:19:56,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 121 events. 9/121 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 296 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 160. Up to 10 conditions per place. [2023-11-17 11:19:56,759 INFO L119 LiptonReduction]: Number of co-enabled transitions 7128 [2023-11-17 11:19:58,496 INFO L134 LiptonReduction]: Checked pairs total: 19104 [2023-11-17 11:19:58,496 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-11-17 11:19:58,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:19:58,498 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;@68257cd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:19:58,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-17 11:19:58,498 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:19:58,499 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 11:19:58,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:19:58,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:19:58,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:19:58,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 11:19:58,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:19:58,499 INFO L85 PathProgramCache]: Analyzing trace with hash 31886326, now seen corresponding path program 1 times [2023-11-17 11:19:58,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:19:58,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949730097] [2023-11-17 11:19:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:19:58,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:19:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:19:58,508 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 11:19:58,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:19:58,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949730097] [2023-11-17 11:19:58,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949730097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:19:58,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:19:58,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:19:58,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650588633] [2023-11-17 11:19:58,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:19:58,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:19:58,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:19:58,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:19:58,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:19:58,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 194 [2023-11-17 11:19:58,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 208 flow. Second operand has 2 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 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 11:19:58,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:19:58,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 194 [2023-11-17 11:19:58,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand