/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:09:16,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:09:16,535 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:09:16,557 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:09:16,558 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:09:16,558 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:09:16,559 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:09:16,559 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:09:16,559 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:09:16,560 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:09:16,560 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:09:16,560 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:09:16,561 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:09:16,561 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:09:16,561 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:09:16,561 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:09:16,562 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:09:16,562 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:09:16,562 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:09:16,563 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:09:16,563 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:09:16,564 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:09:16,564 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:09:16,564 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:09:16,565 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:09:16,565 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:09:16,565 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:09:16,566 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:09:16,566 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:09:16,566 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:09:16,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:09:16,567 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:09:16,567 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:09:16,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:09:16,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:09:16,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:09:16,847 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:09:16,848 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:09:16,849 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-11-17 15:09:18,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:09:18,405 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:09:18,406 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-11-17 15:09:18,425 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a66afef/907e170ecaad4934bbc2d84e325399e0/FLAG8af0d4191 [2023-11-17 15:09:18,439 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a66afef/907e170ecaad4934bbc2d84e325399e0 [2023-11-17 15:09:18,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:09:18,444 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:09:18,445 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:09:18,445 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:09:18,452 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:09:18,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5b8eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18, skipping insertion in model container [2023-11-17 15:09:18,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,508 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:09:18,800 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/29_conditionals_vs.i[30422,30435] [2023-11-17 15:09:18,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:09:18,821 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:09:18,858 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/29_conditionals_vs.i[30422,30435] [2023-11-17 15:09:18,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:09:18,893 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:09:18,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18 WrapperNode [2023-11-17 15:09:18,893 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:09:18,895 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:09:18,895 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:09:18,895 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:09:18,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,929 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 60 [2023-11-17 15:09:18,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:09:18,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:09:18,930 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:09:18,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:09:18,937 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,940 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,945 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,948 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,951 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,953 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:09:18,953 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:09:18,954 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:09:18,954 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:09:18,954 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (1/1) ... [2023-11-17 15:09:18,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:09:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:09:18,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:09:18,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:09:19,010 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:09:19,011 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:09:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:09:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:09:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:09:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:09:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:09:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:09:19,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:09:19,013 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:09:19,107 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:09:19,110 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:09:19,232 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:09:19,291 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:09:19,291 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 15:09:19,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:09:19 BoogieIcfgContainer [2023-11-17 15:09:19,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:09:19,294 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:09:19,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:09:19,298 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:09:19,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:09:18" (1/3) ... [2023-11-17 15:09:19,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636e7e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:09:19, skipping insertion in model container [2023-11-17 15:09:19,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:18" (2/3) ... [2023-11-17 15:09:19,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636e7e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:09:19, skipping insertion in model container [2023-11-17 15:09:19,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:09:19" (3/3) ... [2023-11-17 15:09:19,300 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-11-17 15:09:19,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:09:19,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:09:19,318 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:09:19,370 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:19,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 112 flow [2023-11-17 15:09:19,446 INFO L124 PetriNetUnfolderBase]: 6/65 cut-off events. [2023-11-17 15:09:19,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:19,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 6/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2023-11-17 15:09:19,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 112 flow [2023-11-17 15:09:19,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 54 transitions, 112 flow [2023-11-17 15:09:19,457 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:19,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 54 transitions, 112 flow [2023-11-17 15:09:19,472 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 54 transitions, 112 flow [2023-11-17 15:09:19,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 112 flow [2023-11-17 15:09:19,489 INFO L124 PetriNetUnfolderBase]: 6/65 cut-off events. [2023-11-17 15:09:19,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:19,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 6/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2023-11-17 15:09:19,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 812 [2023-11-17 15:09:21,263 INFO L134 LiptonReduction]: Checked pairs total: 687 [2023-11-17 15:09:21,263 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-11-17 15:09:21,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:21,290 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;@1bd3a993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:21,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:09:21,293 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:21,293 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:09:21,293 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:21,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:21,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:09:21,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:09:21,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash 8853676, now seen corresponding path program 1 times [2023-11-17 15:09:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:21,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128702043] [2023-11-17 15:09:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:21,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:21,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128702043] [2023-11-17 15:09:21,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128702043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:21,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:21,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802985588] [2023-11-17 15:09:21,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:21,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:09:21,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:09:21,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:09:21,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 112 [2023-11-17 15:09:21,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:21,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:21,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 112 [2023-11-17 15:09:21,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:21,517 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-17 15:09:21,517 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:21,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-17 15:09:21,518 INFO L140 encePairwiseOnDemand]: 110/112 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-17 15:09:21,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-17 15:09:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:09:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:09:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2023-11-17 15:09:21,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2023-11-17 15:09:21,530 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 101 transitions. [2023-11-17 15:09:21,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 101 transitions. [2023-11-17 15:09:21,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:21,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 101 transitions. [2023-11-17 15:09:21,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:21,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:21,539 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:21,541 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 2 states and 101 transitions. [2023-11-17 15:09:21,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-17 15:09:21,544 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 15:09:21,545 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-17 15:09:21,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, 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 15:09:21,550 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-11-17 15:09:21,550 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-17 15:09:21,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:21,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:21,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:09:21,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:09:21,551 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 15:09:21,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:21,552 INFO L85 PathProgramCache]: Analyzing trace with hash -81584454, now seen corresponding path program 1 times [2023-11-17 15:09:21,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:21,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125727408] [2023-11-17 15:09:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:21,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:21,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:21,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:21,597 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:21,598 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:09:21,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:09:21,601 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:09:21,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:09:21,601 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:09:21,603 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:21,603 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:09:21,619 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:21,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 178 flow [2023-11-17 15:09:21,638 INFO L124 PetriNetUnfolderBase]: 11/108 cut-off events. [2023-11-17 15:09:21,639 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:09:21,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 108 events. 11/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 71. Up to 6 conditions per place. [2023-11-17 15:09:21,640 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 178 flow [2023-11-17 15:09:21,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 178 flow [2023-11-17 15:09:21,641 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:21,642 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 178 flow [2023-11-17 15:09:21,642 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 178 flow [2023-11-17 15:09:21,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 178 flow [2023-11-17 15:09:21,657 INFO L124 PetriNetUnfolderBase]: 11/108 cut-off events. [2023-11-17 15:09:21,657 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:09:21,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 108 events. 11/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 71. Up to 6 conditions per place. [2023-11-17 15:09:21,660 INFO L119 LiptonReduction]: Number of co-enabled transitions 3364 [2023-11-17 15:09:23,845 INFO L134 LiptonReduction]: Checked pairs total: 2904 [2023-11-17 15:09:23,846 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-11-17 15:09:23,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:23,849 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;@1bd3a993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:23,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:09:23,851 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:23,852 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 15:09:23,852 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:23,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:23,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:09:23,852 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 15:09:23,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash 15032643, now seen corresponding path program 1 times [2023-11-17 15:09:23,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:23,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117531908] [2023-11-17 15:09:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:23,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:23,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117531908] [2023-11-17 15:09:23,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117531908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:23,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:23,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775247568] [2023-11-17 15:09:23,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:23,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:09:23,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:23,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:09:23,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:09:23,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-11-17 15:09:23,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 38 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:23,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:23,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-11-17 15:09:23,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:23,936 INFO L124 PetriNetUnfolderBase]: 20/57 cut-off events. [2023-11-17 15:09:23,936 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-17 15:09:23,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 163 event pairs, 20 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 28. Up to 47 conditions per place. [2023-11-17 15:09:23,937 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 8 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2023-11-17 15:09:23,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 48 flow [2023-11-17 15:09:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:09:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:09:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 155 transitions. [2023-11-17 15:09:23,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45857988165680474 [2023-11-17 15:09:23,945 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 155 transitions. [2023-11-17 15:09:23,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 155 transitions. [2023-11-17 15:09:23,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:23,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 155 transitions. [2023-11-17 15:09:23,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:23,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:23,952 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:23,952 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 38 flow. Second operand 2 states and 155 transitions. [2023-11-17 15:09:23,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 48 flow [2023-11-17 15:09:23,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 48 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:23,954 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 32 flow [2023-11-17 15:09:23,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-11-17 15:09:23,955 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -2 predicate places. [2023-11-17 15:09:23,955 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 32 flow [2023-11-17 15:09:23,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:23,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:23,955 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:09:23,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:09:23,956 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 15:09:23,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1873474311, now seen corresponding path program 1 times [2023-11-17 15:09:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:23,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920475092] [2023-11-17 15:09:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:23,987 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:24,005 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:24,006 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:24,006 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:09:24,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:09:24,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:09:24,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:09:24,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:09:24,007 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:09:24,008 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:24,008 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:09:24,040 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:24,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 246 flow [2023-11-17 15:09:24,061 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-11-17 15:09:24,062 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:09:24,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 16/151 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 346 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 112. Up to 8 conditions per place. [2023-11-17 15:09:24,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 114 transitions, 246 flow [2023-11-17 15:09:24,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 246 flow [2023-11-17 15:09:24,065 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:24,066 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 246 flow [2023-11-17 15:09:24,066 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 246 flow [2023-11-17 15:09:24,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 246 flow [2023-11-17 15:09:24,083 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-11-17 15:09:24,083 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:09:24,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 16/151 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 346 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 112. Up to 8 conditions per place. [2023-11-17 15:09:24,090 INFO L119 LiptonReduction]: Number of co-enabled transitions 7656 [2023-11-17 15:09:27,018 INFO L134 LiptonReduction]: Checked pairs total: 7196 [2023-11-17 15:09:27,018 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-11-17 15:09:27,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:27,022 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;@1bd3a993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:27,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:09:27,024 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:27,024 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 15:09:27,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:27,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:27,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:09:27,025 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 15:09:27,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:27,025 INFO L85 PathProgramCache]: Analyzing trace with hash 23142171, now seen corresponding path program 1 times [2023-11-17 15:09:27,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:27,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668248010] [2023-11-17 15:09:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:27,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:27,067 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 15:09:27,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:27,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668248010] [2023-11-17 15:09:27,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668248010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:27,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:27,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:27,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726250222] [2023-11-17 15:09:27,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:27,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:09:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:09:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:09:27,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 240 [2023-11-17 15:09:27,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:27,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:27,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 240 [2023-11-17 15:09:27,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:27,135 INFO L124 PetriNetUnfolderBase]: 110/225 cut-off events. [2023-11-17 15:09:27,135 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-17 15:09:27,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 225 events. 110/225 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 898 event pairs, 110 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 118. Up to 191 conditions per place. [2023-11-17 15:09:27,140 INFO L140 encePairwiseOnDemand]: 235/240 looper letters, 11 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2023-11-17 15:09:27,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 68 flow [2023-11-17 15:09:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:09:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:09:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 210 transitions. [2023-11-17 15:09:27,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-17 15:09:27,143 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 210 transitions. [2023-11-17 15:09:27,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 210 transitions. [2023-11-17 15:09:27,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:27,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 210 transitions. [2023-11-17 15:09:27,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 105.0) internal successors, (210), 2 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 15:09:27,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:27,146 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:27,146 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 56 flow. Second operand 2 states and 210 transitions. [2023-11-17 15:09:27,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 68 flow [2023-11-17 15:09:27,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 66 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:27,148 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 44 flow [2023-11-17 15:09:27,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2023-11-17 15:09:27,150 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2023-11-17 15:09:27,150 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 44 flow [2023-11-17 15:09:27,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:27,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:27,151 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:09:27,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:09:27,151 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 15:09:27,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash -98951086, now seen corresponding path program 1 times [2023-11-17 15:09:27,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:27,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399829759] [2023-11-17 15:09:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:27,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:27,186 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:27,186 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:27,186 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:09:27,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:09:27,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:09:27,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:09:27,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:09:27,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:09:27,187 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:09:27,188 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:27,188 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:09:27,206 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:27,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 316 flow [2023-11-17 15:09:27,231 INFO L124 PetriNetUnfolderBase]: 21/194 cut-off events. [2023-11-17 15:09:27,231 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:09:27,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 194 events. 21/194 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 504 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 159. Up to 10 conditions per place. [2023-11-17 15:09:27,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 144 transitions, 316 flow [2023-11-17 15:09:27,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 144 transitions, 316 flow [2023-11-17 15:09:27,235 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:27,235 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 144 transitions, 316 flow [2023-11-17 15:09:27,235 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 144 transitions, 316 flow [2023-11-17 15:09:27,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 316 flow [2023-11-17 15:09:27,254 INFO L124 PetriNetUnfolderBase]: 21/194 cut-off events. [2023-11-17 15:09:27,255 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:09:27,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 194 events. 21/194 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 504 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 159. Up to 10 conditions per place. [2023-11-17 15:09:27,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 13688 [2023-11-17 15:09:30,362 INFO L134 LiptonReduction]: Checked pairs total: 12533 [2023-11-17 15:09:30,362 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-11-17 15:09:30,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:30,365 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;@1bd3a993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:30,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:09:30,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:30,366 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:09:30,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:30,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:30,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:09:30,374 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 15:09:30,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash 33174038, now seen corresponding path program 1 times [2023-11-17 15:09:30,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:30,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570868989] [2023-11-17 15:09:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:30,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:30,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:30,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570868989] [2023-11-17 15:09:30,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570868989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:30,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:30,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179300633] [2023-11-17 15:09:30,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:30,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:09:30,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:09:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:09:30,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 300 [2023-11-17 15:09:30,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 72 flow. Second operand has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:30,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:30,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 300 [2023-11-17 15:09:30,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:30,491 INFO L124 PetriNetUnfolderBase]: 488/837 cut-off events. [2023-11-17 15:09:30,491 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-11-17 15:09:30,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 837 events. 488/837 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3901 event pairs, 488 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 475. Up to 731 conditions per place. [2023-11-17 15:09:30,497 INFO L140 encePairwiseOnDemand]: 295/300 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-11-17 15:09:30,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 90 flow [2023-11-17 15:09:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:09:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:09:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 263 transitions. [2023-11-17 15:09:30,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43833333333333335 [2023-11-17 15:09:30,499 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 263 transitions. [2023-11-17 15:09:30,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 263 transitions. [2023-11-17 15:09:30,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:30,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 263 transitions. [2023-11-17 15:09:30,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:30,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:30,510 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:30,511 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 72 flow. Second operand 2 states and 263 transitions. [2023-11-17 15:09:30,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 90 flow [2023-11-17 15:09:30,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 84 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:30,512 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 56 flow [2023-11-17 15:09:30,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-17 15:09:30,513 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -4 predicate places. [2023-11-17 15:09:30,513 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 56 flow [2023-11-17 15:09:30,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:30,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:30,513 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:09:30,513 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 15:09:30,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1613471331, now seen corresponding path program 1 times [2023-11-17 15:09:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:30,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527830568] [2023-11-17 15:09:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:30,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:30,533 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:30,546 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:30,546 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:30,546 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:09:30,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:09:30,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:09:30,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:09:30,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:09:30,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:09:30,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:09:30,547 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:09:30,548 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:30,548 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:09:30,567 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:30,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 388 flow [2023-11-17 15:09:30,597 INFO L124 PetriNetUnfolderBase]: 26/237 cut-off events. [2023-11-17 15:09:30,598 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:09:30,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 237 events. 26/237 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 660 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 207. Up to 12 conditions per place. [2023-11-17 15:09:30,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 388 flow [2023-11-17 15:09:30,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 388 flow [2023-11-17 15:09:30,602 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:30,602 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 174 transitions, 388 flow [2023-11-17 15:09:30,603 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 174 transitions, 388 flow [2023-11-17 15:09:30,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 388 flow [2023-11-17 15:09:30,635 INFO L124 PetriNetUnfolderBase]: 26/237 cut-off events. [2023-11-17 15:09:30,636 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:09:30,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 237 events. 26/237 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 660 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 207. Up to 12 conditions per place. [2023-11-17 15:09:30,670 INFO L119 LiptonReduction]: Number of co-enabled transitions 21460 [2023-11-17 15:09:34,980 INFO L134 LiptonReduction]: Checked pairs total: 20365 [2023-11-17 15:09:34,980 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-11-17 15:09:34,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:34,989 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;@1bd3a993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:34,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:09:34,991 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:34,991 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 15:09:34,991 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:34,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:34,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:09:34,992 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 15:09:34,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:34,992 INFO L85 PathProgramCache]: Analyzing trace with hash 44963581, now seen corresponding path program 1 times [2023-11-17 15:09:34,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:34,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325417150] [2023-11-17 15:09:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:34,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:35,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325417150] [2023-11-17 15:09:35,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325417150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:35,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:35,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:35,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328202551] [2023-11-17 15:09:35,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:35,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:09:35,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:35,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:09:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:09:35,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 368 [2023-11-17 15:09:35,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 94 flow. Second operand has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:35,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:35,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 368 [2023-11-17 15:09:35,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:35,381 INFO L124 PetriNetUnfolderBase]: 1946/2997 cut-off events. [2023-11-17 15:09:35,382 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2023-11-17 15:09:35,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6346 conditions, 2997 events. 1946/2997 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15433 event pairs, 1946 based on Foata normal form. 0/2876 useless extension candidates. Maximal degree in co-relation 1789. Up to 2675 conditions per place. [2023-11-17 15:09:35,402 INFO L140 encePairwiseOnDemand]: 361/368 looper letters, 17 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-11-17 15:09:35,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 114 flow [2023-11-17 15:09:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:09:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:09:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 318 transitions. [2023-11-17 15:09:35,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320652173913043 [2023-11-17 15:09:35,404 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 318 transitions. [2023-11-17 15:09:35,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 318 transitions. [2023-11-17 15:09:35,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:35,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 318 transitions. [2023-11-17 15:09:35,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 159.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:35,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:35,409 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 368.0) internal successors, (1104), 3 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:35,409 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 94 flow. Second operand 2 states and 318 transitions. [2023-11-17 15:09:35,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 114 flow [2023-11-17 15:09:35,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 102 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:35,415 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 68 flow [2023-11-17 15:09:35,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=368, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-11-17 15:09:35,416 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-11-17 15:09:35,416 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 68 flow [2023-11-17 15:09:35,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:35,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:35,417 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:35,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:09:35,417 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 15:09:35,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:35,418 INFO L85 PathProgramCache]: Analyzing trace with hash -963159054, now seen corresponding path program 1 times [2023-11-17 15:09:35,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:35,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911080258] [2023-11-17 15:09:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:35,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:35,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:35,473 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:35,473 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:35,474 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 15:09:35,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 15:09:35,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 15:09:35,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 15:09:35,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 15:09:35,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 15:09:35,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 15:09:35,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:09:35,475 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:09:35,476 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:35,476 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 15:09:35,506 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:35,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 462 flow [2023-11-17 15:09:35,539 INFO L124 PetriNetUnfolderBase]: 31/280 cut-off events. [2023-11-17 15:09:35,539 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:09:35,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 280 events. 31/280 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 794 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2023-11-17 15:09:35,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 462 flow [2023-11-17 15:09:35,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 462 flow [2023-11-17 15:09:35,545 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:35,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 462 flow [2023-11-17 15:09:35,546 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 462 flow [2023-11-17 15:09:35,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 462 flow [2023-11-17 15:09:35,575 INFO L124 PetriNetUnfolderBase]: 31/280 cut-off events. [2023-11-17 15:09:35,575 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:09:35,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 280 events. 31/280 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 794 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2023-11-17 15:09:35,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 30972 [2023-11-17 15:09:39,894 INFO L134 LiptonReduction]: Checked pairs total: 27785 [2023-11-17 15:09:39,894 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-11-17 15:09:39,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:39,898 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;@1bd3a993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:39,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 15:09:39,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:39,899 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 15:09:39,900 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:39,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:39,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:09:39,900 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 15:09:39,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash 59164510, now seen corresponding path program 1 times [2023-11-17 15:09:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:39,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627093095] [2023-11-17 15:09:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:39,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:39,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627093095] [2023-11-17 15:09:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627093095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:39,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:39,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:39,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838696832] [2023-11-17 15:09:39,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:39,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:09:39,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:39,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:09:39,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:09:39,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 430 [2023-11-17 15:09:39,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 120 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:39,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:39,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 430 [2023-11-17 15:09:39,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:40,992 INFO L124 PetriNetUnfolderBase]: 7292/10449 cut-off events. [2023-11-17 15:09:40,992 INFO L125 PetriNetUnfolderBase]: For 9628/9628 co-relation queries the response was YES. [2023-11-17 15:09:41,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22304 conditions, 10449 events. 7292/10449 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57350 event pairs, 7292 based on Foata normal form. 0/10085 useless extension candidates. Maximal degree in co-relation 6460. Up to 9479 conditions per place. [2023-11-17 15:09:41,070 INFO L140 encePairwiseOnDemand]: 420/430 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-11-17 15:09:41,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 140 flow [2023-11-17 15:09:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:09:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:09:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 374 transitions. [2023-11-17 15:09:41,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2023-11-17 15:09:41,073 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 374 transitions. [2023-11-17 15:09:41,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 374 transitions. [2023-11-17 15:09:41,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:41,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 374 transitions. [2023-11-17 15:09:41,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 187.0) internal successors, (374), 2 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 430.0) internal successors, (1290), 3 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,076 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 430.0) internal successors, (1290), 3 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,077 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 120 flow. Second operand 2 states and 374 transitions. [2023-11-17 15:09:41,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 140 flow [2023-11-17 15:09:41,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 120 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:41,084 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 80 flow [2023-11-17 15:09:41,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-11-17 15:09:41,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2023-11-17 15:09:41,086 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 80 flow [2023-11-17 15:09:41,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:41,086 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:41,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:09:41,086 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 15:09:41,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:41,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1680987757, now seen corresponding path program 1 times [2023-11-17 15:09:41,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:41,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810897684] [2023-11-17 15:09:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:41,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:41,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:41,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:41,131 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:41,132 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-17 15:09:41,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-17 15:09:41,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-17 15:09:41,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-17 15:09:41,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-17 15:09:41,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-17 15:09:41,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-17 15:09:41,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-17 15:09:41,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:09:41,133 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:09:41,135 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:41,135 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-17 15:09:41,164 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:41,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 538 flow [2023-11-17 15:09:41,303 INFO L124 PetriNetUnfolderBase]: 36/323 cut-off events. [2023-11-17 15:09:41,303 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 15:09:41,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 323 events. 36/323 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 959 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-11-17 15:09:41,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 538 flow [2023-11-17 15:09:41,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 234 transitions, 538 flow [2023-11-17 15:09:41,308 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:41,309 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 234 transitions, 538 flow [2023-11-17 15:09:41,309 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 234 transitions, 538 flow [2023-11-17 15:09:41,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 538 flow [2023-11-17 15:09:41,344 INFO L124 PetriNetUnfolderBase]: 36/323 cut-off events. [2023-11-17 15:09:41,345 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-17 15:09:41,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 323 events. 36/323 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 959 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-11-17 15:09:41,361 INFO L119 LiptonReduction]: Number of co-enabled transitions 42224 [2023-11-17 15:09:46,442 INFO L134 LiptonReduction]: Checked pairs total: 40240 [2023-11-17 15:09:46,443 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-11-17 15:09:46,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:46,445 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;@1bd3a993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:46,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 15:09:46,446 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:46,446 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 15:09:46,447 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:46,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:46,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:09:46,447 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 15:09:46,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash 75397084, now seen corresponding path program 1 times [2023-11-17 15:09:46,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:46,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020131885] [2023-11-17 15:09:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:46,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:46,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:46,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020131885] [2023-11-17 15:09:46,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020131885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:46,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:46,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710666111] [2023-11-17 15:09:46,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:09:46,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:09:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:09:46,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 500 [2023-11-17 15:09:46,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 142 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:46,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:46,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 500 [2023-11-17 15:09:46,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:49,992 INFO L124 PetriNetUnfolderBase]: 26246/35721 cut-off events. [2023-11-17 15:09:49,993 INFO L125 PetriNetUnfolderBase]: For 40003/40003 co-relation queries the response was YES. [2023-11-17 15:09:50,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76737 conditions, 35721 events. 26246/35721 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 205737 event pairs, 26246 based on Foata normal form. 0/34628 useless extension candidates. Maximal degree in co-relation 22660. Up to 32807 conditions per place. [2023-11-17 15:09:50,194 INFO L140 encePairwiseOnDemand]: 490/500 looper letters, 23 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-11-17 15:09:50,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 168 flow [2023-11-17 15:09:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:09:50,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:09:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 427 transitions. [2023-11-17 15:09:50,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427 [2023-11-17 15:09:50,196 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 427 transitions. [2023-11-17 15:09:50,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 427 transitions. [2023-11-17 15:09:50,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:50,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 427 transitions. [2023-11-17 15:09:50,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:50,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 500.0) internal successors, (1500), 3 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:50,200 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 500.0) internal successors, (1500), 3 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:50,200 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 142 flow. Second operand 2 states and 427 transitions. [2023-11-17 15:09:50,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 168 flow [2023-11-17 15:09:50,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 26 transitions, 138 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:50,225 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 92 flow [2023-11-17 15:09:50,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=500, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2023-11-17 15:09:50,226 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-11-17 15:09:50,226 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 92 flow [2023-11-17 15:09:50,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:50,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:50,227 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:50,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 15:09:50,227 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 15:09:50,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:50,227 INFO L85 PathProgramCache]: Analyzing trace with hash -361541891, now seen corresponding path program 1 times [2023-11-17 15:09:50,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:50,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346468956] [2023-11-17 15:09:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:50,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:50,241 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:50,253 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:50,253 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:50,256 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-17 15:09:50,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-17 15:09:50,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-17 15:09:50,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-17 15:09:50,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-17 15:09:50,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-17 15:09:50,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-17 15:09:50,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-17 15:09:50,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-17 15:09:50,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 15:09:50,258 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:09:50,258 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:50,258 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-17 15:09:50,283 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:50,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 616 flow [2023-11-17 15:09:50,323 INFO L124 PetriNetUnfolderBase]: 41/366 cut-off events. [2023-11-17 15:09:50,323 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 15:09:50,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 366 events. 41/366 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1118 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-11-17 15:09:50,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 264 transitions, 616 flow [2023-11-17 15:09:50,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 264 transitions, 616 flow [2023-11-17 15:09:50,330 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:50,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 264 transitions, 616 flow [2023-11-17 15:09:50,331 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 264 transitions, 616 flow [2023-11-17 15:09:50,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 616 flow [2023-11-17 15:09:50,378 INFO L124 PetriNetUnfolderBase]: 41/366 cut-off events. [2023-11-17 15:09:50,378 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 15:09:50,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 366 events. 41/366 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1118 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-11-17 15:09:50,399 INFO L119 LiptonReduction]: Number of co-enabled transitions 55216 [2023-11-17 15:09:56,170 INFO L134 LiptonReduction]: Checked pairs total: 53666 [2023-11-17 15:09:56,170 INFO L136 LiptonReduction]: Total number of compositions: 300 [2023-11-17 15:09:56,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:56,173 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;@1bd3a993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:56,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-17 15:09:56,174 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:56,174 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-17 15:09:56,174 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:56,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:56,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:09:56,174 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 15:09:56,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:56,175 INFO L85 PathProgramCache]: Analyzing trace with hash 93460656, now seen corresponding path program 1 times [2023-11-17 15:09:56,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:56,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516082861] [2023-11-17 15:09:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:56,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:56,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516082861] [2023-11-17 15:09:56,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516082861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:56,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:56,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:56,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771098713] [2023-11-17 15:09:56,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:56,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:09:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:56,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:09:56,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:09:56,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 564 [2023-11-17 15:09:56,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:56,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:56,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 564 [2023-11-17 15:09:56,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:06,893 INFO L124 PetriNetUnfolderBase]: 91856/120285 cut-off events. [2023-11-17 15:10:06,893 INFO L125 PetriNetUnfolderBase]: For 158830/158830 co-relation queries the response was YES. [2023-11-17 15:10:07,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259717 conditions, 120285 events. 91856/120285 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 4108. Compared 716431 event pairs, 91856 based on Foata normal form. 0/117005 useless extension candidates. Maximal degree in co-relation 77821. Up to 111539 conditions per place. [2023-11-17 15:10:07,717 INFO L140 encePairwiseOnDemand]: 553/564 looper letters, 26 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-11-17 15:10:07,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 29 transitions, 198 flow [2023-11-17 15:10:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 481 transitions. [2023-11-17 15:10:07,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42641843971631205 [2023-11-17 15:10:07,719 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 481 transitions. [2023-11-17 15:10:07,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 481 transitions. [2023-11-17 15:10:07,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:07,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 481 transitions. [2023-11-17 15:10:07,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:07,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 564.0) internal successors, (1692), 3 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:07,724 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 564.0) internal successors, (1692), 3 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:07,724 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 168 flow. Second operand 2 states and 481 transitions. [2023-11-17 15:10:07,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 29 transitions, 198 flow [2023-11-17 15:10:07,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 156 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:07,941 INFO L231 Difference]: Finished difference. Result has 47 places, 29 transitions, 104 flow [2023-11-17 15:10:07,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=564, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2023-11-17 15:10:07,941 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2023-11-17 15:10:07,942 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 104 flow [2023-11-17 15:10:07,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:07,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:07,942 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:07,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 15:10:07,942 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 15:10:07,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1559696181, now seen corresponding path program 1 times [2023-11-17 15:10:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:07,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566400767] [2023-11-17 15:10:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:07,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:07,989 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:08,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:08,008 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:08,008 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-17 15:10:08,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-11-17 15:10:08,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-11-17 15:10:08,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-11-17 15:10:08,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-11-17 15:10:08,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-11-17 15:10:08,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-11-17 15:10:08,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-11-17 15:10:08,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-11-17 15:10:08,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-11-17 15:10:08,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 15:10:08,010 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:08,010 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:08,010 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-11-17 15:10:08,050 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:08,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 696 flow [2023-11-17 15:10:08,278 INFO L124 PetriNetUnfolderBase]: 46/409 cut-off events. [2023-11-17 15:10:08,279 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-17 15:10:08,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 409 events. 46/409 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1279 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-11-17 15:10:08,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 294 transitions, 696 flow [2023-11-17 15:10:08,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 294 transitions, 696 flow [2023-11-17 15:10:08,286 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:08,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 294 transitions, 696 flow [2023-11-17 15:10:08,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 294 transitions, 696 flow [2023-11-17 15:10:08,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 696 flow [2023-11-17 15:10:08,330 INFO L124 PetriNetUnfolderBase]: 46/409 cut-off events. [2023-11-17 15:10:08,330 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-17 15:10:08,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 409 events. 46/409 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1279 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-11-17 15:10:08,350 INFO L119 LiptonReduction]: Number of co-enabled transitions 69948 [2023-11-17 15:10:14,639 INFO L134 LiptonReduction]: Checked pairs total: 69664 [2023-11-17 15:10:14,639 INFO L136 LiptonReduction]: Total number of compositions: 336 [2023-11-17 15:10:14,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:14,644 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;@1bd3a993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:14,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-17 15:10:14,645 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:14,645 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-11-17 15:10:14,645 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:14,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:14,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:14,645 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 15:10:14,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash 113525171, now seen corresponding path program 1 times [2023-11-17 15:10:14,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:14,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071276031] [2023-11-17 15:10:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:10:14,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:14,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071276031] [2023-11-17 15:10:14,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071276031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:14,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:14,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847987216] [2023-11-17 15:10:14,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:14,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:14,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:14,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 630 [2023-11-17 15:10:14,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 202 flow. Second operand has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:10:14,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:14,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 630 [2023-11-17 15:10:14,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand