/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-lit/sssc12_variant-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:20:07,338 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:20:07,376 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 15:20:07,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:20:07,392 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:20:07,392 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:20:07,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:20:07,392 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:20:07,393 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:20:07,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:20:07,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:20:07,393 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:20:07,394 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:20:07,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:20:07,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:20:07,394 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:20:07,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:20:07,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:20:07,395 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:20:07,395 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:20:07,396 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:20:07,396 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:20:07,396 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:20:07,397 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:20:07,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:20:07,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:20:07,397 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:20:07,397 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:20:07,398 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:20:07,398 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:20:07,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:20:07,398 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:20:07,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:20:07,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:20:07,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:20:07,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:20:07,609 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:20:07,609 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:20:07,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/sssc12_variant-pthread.i [2023-11-17 15:20:08,623 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:20:08,864 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:20:08,867 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12_variant-pthread.i [2023-11-17 15:20:08,886 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5954f8420/90c04a468cf14c40a0c42bebc8fa88d4/FLAGcaaa75570 [2023-11-17 15:20:08,902 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5954f8420/90c04a468cf14c40a0c42bebc8fa88d4 [2023-11-17 15:20:08,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:20:08,906 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:20:08,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:20:08,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:20:08,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:20:08,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338cb0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08, skipping insertion in model container [2023-11-17 15:20:08,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,959 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:20:09,227 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 15:20:09,299 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-lit/sssc12_variant-pthread.i[47777,47790] [2023-11-17 15:20:09,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:20:09,328 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:20:09,355 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 15:20:09,360 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-lit/sssc12_variant-pthread.i[47777,47790] [2023-11-17 15:20:09,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:20:09,420 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:20:09,425 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:20:09,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09 WrapperNode [2023-11-17 15:20:09,427 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:20:09,428 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:20:09,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:20:09,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:20:09,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,455 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,479 INFO L138 Inliner]: procedures = 274, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2023-11-17 15:20:09,479 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:20:09,480 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:20:09,480 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:20:09,480 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:20:09,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,493 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,493 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,497 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,503 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:20:09,504 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:20:09,504 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:20:09,504 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:20:09,513 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:20:09,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:20:09,549 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 15:20:09,581 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 15:20:09,598 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-17 15:20:09,598 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-17 15:20:09,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:20:09,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:20:09,599 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:20:09,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:20:09,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:20:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:20:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 15:20:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:20:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:20:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:20:09,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:20:09,601 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 15:20:09,740 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:20:09,741 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:20:09,913 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:20:09,926 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:20:09,926 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:20:09,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:20:09 BoogieIcfgContainer [2023-11-17 15:20:09,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:20:09,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:20:09,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:20:09,934 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:20:09,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:20:08" (1/3) ... [2023-11-17 15:20:09,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d6cc63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:20:09, skipping insertion in model container [2023-11-17 15:20:09,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (2/3) ... [2023-11-17 15:20:09,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d6cc63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:20:09, skipping insertion in model container [2023-11-17 15:20:09,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:20:09" (3/3) ... [2023-11-17 15:20:09,936 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant-pthread.i [2023-11-17 15:20:09,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:20:09,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:20:09,948 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:20:09,981 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:10,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 89 transitions, 182 flow [2023-11-17 15:20:10,032 INFO L124 PetriNetUnfolderBase]: 7/102 cut-off events. [2023-11-17 15:20:10,032 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:10,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 102 events. 7/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2023-11-17 15:20:10,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 89 transitions, 182 flow [2023-11-17 15:20:10,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 89 transitions, 182 flow [2023-11-17 15:20:10,047 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:10,054 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 89 transitions, 182 flow [2023-11-17 15:20:10,056 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 89 transitions, 182 flow [2023-11-17 15:20:10,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 89 transitions, 182 flow [2023-11-17 15:20:10,073 INFO L124 PetriNetUnfolderBase]: 7/102 cut-off events. [2023-11-17 15:20:10,074 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:10,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 102 events. 7/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2023-11-17 15:20:10,075 INFO L119 LiptonReduction]: Number of co-enabled transitions 1088 [2023-11-17 15:20:12,707 INFO L134 LiptonReduction]: Checked pairs total: 1307 [2023-11-17 15:20:12,708 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-11-17 15:20:12,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:12,734 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;@30cfbe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:12,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:20:12,742 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:12,742 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-11-17 15:20:12,742 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:12,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:12,743 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:20:12,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:20:12,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1708964536, now seen corresponding path program 1 times [2023-11-17 15:20:12,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:12,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207793544] [2023-11-17 15:20:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:12,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:12,855 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:20:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:12,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:20:12,919 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:20:12,920 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:20:12,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:20:12,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:20:12,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:20:12,922 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:20:12,924 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:20:12,924 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:20:12,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:12,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 124 transitions, 258 flow [2023-11-17 15:20:12,980 INFO L124 PetriNetUnfolderBase]: 12/152 cut-off events. [2023-11-17 15:20:12,980 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:20:12,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 152 events. 12/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 277 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-11-17 15:20:12,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 124 transitions, 258 flow [2023-11-17 15:20:12,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 124 transitions, 258 flow [2023-11-17 15:20:12,987 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:12,987 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 124 transitions, 258 flow [2023-11-17 15:20:12,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 124 transitions, 258 flow [2023-11-17 15:20:12,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 124 transitions, 258 flow [2023-11-17 15:20:13,022 INFO L124 PetriNetUnfolderBase]: 12/152 cut-off events. [2023-11-17 15:20:13,023 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:20:13,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 152 events. 12/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 277 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-11-17 15:20:13,029 INFO L119 LiptonReduction]: Number of co-enabled transitions 4556 [2023-11-17 15:20:15,703 INFO L134 LiptonReduction]: Checked pairs total: 11532 [2023-11-17 15:20:15,703 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-11-17 15:20:15,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:15,705 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;@30cfbe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:15,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:20:15,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:15,708 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-11-17 15:20:15,708 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:20:15,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:15,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:15,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:20:15,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1695099524, now seen corresponding path program 1 times [2023-11-17 15:20:15,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:15,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120614845] [2023-11-17 15:20:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:15,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:15,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:15,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120614845] [2023-11-17 15:20:15,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120614845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:15,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:15,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:15,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55445890] [2023-11-17 15:20:15,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:15,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:15,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:15,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 239 [2023-11-17 15:20:15,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 15:20:15,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:15,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 239 [2023-11-17 15:20:15,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:15,984 INFO L124 PetriNetUnfolderBase]: 307/587 cut-off events. [2023-11-17 15:20:15,984 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-17 15:20:15,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 587 events. 307/587 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2958 event pairs, 173 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 782. Up to 394 conditions per place. [2023-11-17 15:20:15,988 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 28 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-17 15:20:15,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 161 flow [2023-11-17 15:20:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:15,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-11-17 15:20:15,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476987447698745 [2023-11-17 15:20:15,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-11-17 15:20:16,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-11-17 15:20:16,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:16,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-11-17 15:20:16,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 15:20:16,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 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 15:20:16,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 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 15:20:16,011 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 78 flow. Second operand 3 states and 321 transitions. [2023-11-17 15:20:16,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 161 flow [2023-11-17 15:20:16,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 161 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:16,016 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 84 flow [2023-11-17 15:20:16,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-11-17 15:20:16,020 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-11-17 15:20:16,021 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 84 flow [2023-11-17 15:20:16,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 15:20:16,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:16,021 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:20:16,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:20:16,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:20:16,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash -273646229, now seen corresponding path program 1 times [2023-11-17 15:20:16,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:16,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913336658] [2023-11-17 15:20:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:16,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:16,045 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:20:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:16,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:20:16,056 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:20:16,056 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:20:16,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:20:16,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:20:16,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:20:16,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:20:16,057 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:20:16,057 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:20:16,057 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:20:16,071 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:16,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 159 transitions, 336 flow [2023-11-17 15:20:16,089 INFO L124 PetriNetUnfolderBase]: 17/202 cut-off events. [2023-11-17 15:20:16,089 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:20:16,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 17/202 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 479 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-11-17 15:20:16,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 159 transitions, 336 flow [2023-11-17 15:20:16,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 159 transitions, 336 flow [2023-11-17 15:20:16,091 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:16,091 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 159 transitions, 336 flow [2023-11-17 15:20:16,091 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 159 transitions, 336 flow [2023-11-17 15:20:16,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 159 transitions, 336 flow [2023-11-17 15:20:16,105 INFO L124 PetriNetUnfolderBase]: 17/202 cut-off events. [2023-11-17 15:20:16,105 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:20:16,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 17/202 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 479 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-11-17 15:20:16,109 INFO L119 LiptonReduction]: Number of co-enabled transitions 10404 [2023-11-17 15:20:18,958 INFO L134 LiptonReduction]: Checked pairs total: 28248 [2023-11-17 15:20:18,958 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-11-17 15:20:18,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:18,960 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;@30cfbe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:18,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:20:18,963 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:18,963 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-11-17 15:20:18,963 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:20:18,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:18,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:18,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:18,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash 298529492, now seen corresponding path program 1 times [2023-11-17 15:20:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:18,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736359008] [2023-11-17 15:20:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:19,009 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 15:20:19,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:19,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736359008] [2023-11-17 15:20:19,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736359008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:19,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:19,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:19,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642226069] [2023-11-17 15:20:19,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:19,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:19,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:19,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 309 [2023-11-17 15:20:19,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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 15:20:19,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:19,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 309 [2023-11-17 15:20:19,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:19,747 INFO L124 PetriNetUnfolderBase]: 6807/10169 cut-off events. [2023-11-17 15:20:19,747 INFO L125 PetriNetUnfolderBase]: For 916/916 co-relation queries the response was YES. [2023-11-17 15:20:19,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19925 conditions, 10169 events. 6807/10169 cut-off events. For 916/916 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 63952 event pairs, 3346 based on Foata normal form. 0/7425 useless extension candidates. Maximal degree in co-relation 5803. Up to 5923 conditions per place. [2023-11-17 15:20:19,806 INFO L140 encePairwiseOnDemand]: 302/309 looper letters, 52 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-17 15:20:19,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 274 flow [2023-11-17 15:20:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-11-17 15:20:19,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47249190938511326 [2023-11-17 15:20:19,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-11-17 15:20:19,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-11-17 15:20:19,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:19,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-11-17 15:20:19,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 15:20:19,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:19,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:19,816 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 120 flow. Second operand 3 states and 438 transitions. [2023-11-17 15:20:19,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 274 flow [2023-11-17 15:20:19,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 270 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:19,821 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 118 flow [2023-11-17 15:20:19,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-11-17 15:20:19,822 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-11-17 15:20:19,822 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 118 flow [2023-11-17 15:20:19,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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 15:20:19,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:19,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:19,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:20:19,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:19,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:19,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1677295840, now seen corresponding path program 1 times [2023-11-17 15:20:19,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:19,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481073216] [2023-11-17 15:20:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:19,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:19,930 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 15:20:19,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:19,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481073216] [2023-11-17 15:20:19,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481073216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:19,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:19,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:19,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883757784] [2023-11-17 15:20:19,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:19,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:19,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:19,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:19,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 309 [2023-11-17 15:20:19,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 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 15:20:19,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:19,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 309 [2023-11-17 15:20:19,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:20,740 INFO L124 PetriNetUnfolderBase]: 7790/11540 cut-off events. [2023-11-17 15:20:20,740 INFO L125 PetriNetUnfolderBase]: For 1817/1817 co-relation queries the response was YES. [2023-11-17 15:20:20,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23492 conditions, 11540 events. 7790/11540 cut-off events. For 1817/1817 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 72106 event pairs, 5533 based on Foata normal form. 0/8895 useless extension candidates. Maximal degree in co-relation 13343. Up to 9902 conditions per place. [2023-11-17 15:20:20,802 INFO L140 encePairwiseOnDemand]: 303/309 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-11-17 15:20:20,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 282 flow [2023-11-17 15:20:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-11-17 15:20:20,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261057173678533 [2023-11-17 15:20:20,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-11-17 15:20:20,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-11-17 15:20:20,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:20,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-11-17 15:20:20,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 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 15:20:20,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:20,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:20,807 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 118 flow. Second operand 3 states and 395 transitions. [2023-11-17 15:20:20,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 282 flow [2023-11-17 15:20:20,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 69 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:20,810 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 147 flow [2023-11-17 15:20:20,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-11-17 15:20:20,811 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-11-17 15:20:20,811 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 147 flow [2023-11-17 15:20:20,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 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 15:20:20,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:20,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:20,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:20:20,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:20,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:20,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1640932203, now seen corresponding path program 1 times [2023-11-17 15:20:20,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:20,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772057557] [2023-11-17 15:20:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:20:20,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772057557] [2023-11-17 15:20:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772057557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:20,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:20,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:20,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434858968] [2023-11-17 15:20:20,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:20,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:20,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:20,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:20,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 309 [2023-11-17 15:20:20,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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 15:20:20,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:20,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 309 [2023-11-17 15:20:20,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:21,873 INFO L124 PetriNetUnfolderBase]: 9085/13368 cut-off events. [2023-11-17 15:20:21,873 INFO L125 PetriNetUnfolderBase]: For 4370/4621 co-relation queries the response was YES. [2023-11-17 15:20:21,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30990 conditions, 13368 events. 9085/13368 cut-off events. For 4370/4621 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 88662 event pairs, 4490 based on Foata normal form. 500/12050 useless extension candidates. Maximal degree in co-relation 20535. Up to 7949 conditions per place. [2023-11-17 15:20:21,949 INFO L140 encePairwiseOnDemand]: 306/309 looper letters, 58 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-17 15:20:21,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 338 flow [2023-11-17 15:20:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-11-17 15:20:21,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627831715210356 [2023-11-17 15:20:21,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-11-17 15:20:21,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-11-17 15:20:21,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:21,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-11-17 15:20:21,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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 15:20:21,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:21,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:21,954 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 147 flow. Second operand 3 states and 429 transitions. [2023-11-17 15:20:21,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 338 flow [2023-11-17 15:20:21,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:20:21,962 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 152 flow [2023-11-17 15:20:21,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-11-17 15:20:21,964 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-11-17 15:20:21,965 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 152 flow [2023-11-17 15:20:21,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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 15:20:21,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:21,965 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:20:21,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:20:21,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:21,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1527624, now seen corresponding path program 1 times [2023-11-17 15:20:21,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:21,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425254817] [2023-11-17 15:20:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:21,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:21,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:20:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:22,004 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:20:22,004 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:20:22,004 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:20:22,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:20:22,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:20:22,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:20:22,005 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:20:22,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:20:22,005 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:20:22,006 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:20:22,006 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:20:22,037 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:22,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 194 transitions, 416 flow [2023-11-17 15:20:22,064 INFO L124 PetriNetUnfolderBase]: 22/252 cut-off events. [2023-11-17 15:20:22,064 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:20:22,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 252 events. 22/252 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 703 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 210. Up to 10 conditions per place. [2023-11-17 15:20:22,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 194 transitions, 416 flow [2023-11-17 15:20:22,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 194 transitions, 416 flow [2023-11-17 15:20:22,067 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:22,067 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 194 transitions, 416 flow [2023-11-17 15:20:22,067 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 194 transitions, 416 flow [2023-11-17 15:20:22,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 194 transitions, 416 flow [2023-11-17 15:20:22,087 INFO L124 PetriNetUnfolderBase]: 22/252 cut-off events. [2023-11-17 15:20:22,087 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:20:22,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 252 events. 22/252 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 703 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 210. Up to 10 conditions per place. [2023-11-17 15:20:22,096 INFO L119 LiptonReduction]: Number of co-enabled transitions 18632 [2023-11-17 15:20:25,437 INFO L134 LiptonReduction]: Checked pairs total: 53755 [2023-11-17 15:20:25,438 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-11-17 15:20:25,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:25,439 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;@30cfbe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:25,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:20:25,442 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:25,442 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2023-11-17 15:20:25,442 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:20:25,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:25,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:25,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:20:25,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash 644443909, now seen corresponding path program 1 times [2023-11-17 15:20:25,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:25,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897961212] [2023-11-17 15:20:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:25,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:25,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:25,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897961212] [2023-11-17 15:20:25,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897961212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:25,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:25,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:25,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753375164] [2023-11-17 15:20:25,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:25,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:25,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:25,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:25,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:25,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 367 [2023-11-17 15:20:25,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 15:20:25,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:25,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 367 [2023-11-17 15:20:25,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:28,947 INFO L124 PetriNetUnfolderBase]: 38597/53819 cut-off events. [2023-11-17 15:20:28,947 INFO L125 PetriNetUnfolderBase]: For 7844/7844 co-relation queries the response was YES. [2023-11-17 15:20:29,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105182 conditions, 53819 events. 38597/53819 cut-off events. For 7844/7844 co-relation queries the response was YES. Maximal size of possible extension queue 1846. Compared 355792 event pairs, 22516 based on Foata normal form. 0/38747 useless extension candidates. Maximal degree in co-relation 46924. Up to 38521 conditions per place. [2023-11-17 15:20:29,304 INFO L140 encePairwiseOnDemand]: 359/367 looper letters, 56 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-17 15:20:29,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 335 flow [2023-11-17 15:20:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-11-17 15:20:29,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4822888283378747 [2023-11-17 15:20:29,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-11-17 15:20:29,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-11-17 15:20:29,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:29,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-11-17 15:20:29,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 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 15:20:29,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:20:29,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:20:29,309 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 160 flow. Second operand 3 states and 531 transitions. [2023-11-17 15:20:29,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 335 flow [2023-11-17 15:20:29,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 323 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:29,314 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 152 flow [2023-11-17 15:20:29,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-11-17 15:20:29,315 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-11-17 15:20:29,315 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 152 flow [2023-11-17 15:20:29,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 15:20:29,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:29,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:29,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:20:29,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:20:29,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash -540994795, now seen corresponding path program 1 times [2023-11-17 15:20:29,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:29,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329552167] [2023-11-17 15:20:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:29,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:29,374 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 15:20:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329552167] [2023-11-17 15:20:29,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329552167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:29,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:29,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540102173] [2023-11-17 15:20:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:29,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:29,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:29,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 367 [2023-11-17 15:20:29,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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 15:20:29,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:29,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 367 [2023-11-17 15:20:29,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:33,893 INFO L124 PetriNetUnfolderBase]: 50854/69816 cut-off events. [2023-11-17 15:20:33,893 INFO L125 PetriNetUnfolderBase]: For 11157/11157 co-relation queries the response was YES. [2023-11-17 15:20:34,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140797 conditions, 69816 events. 50854/69816 cut-off events. For 11157/11157 co-relation queries the response was YES. Maximal size of possible extension queue 2249. Compared 466859 event pairs, 34011 based on Foata normal form. 0/53183 useless extension candidates. Maximal degree in co-relation 93249. Up to 59014 conditions per place. [2023-11-17 15:20:34,320 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 55 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2023-11-17 15:20:34,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 87 transitions, 341 flow [2023-11-17 15:20:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:34,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-11-17 15:20:34,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43505903723887374 [2023-11-17 15:20:34,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-11-17 15:20:34,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-11-17 15:20:34,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:34,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-11-17 15:20:34,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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 15:20:34,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:20:34,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:20:34,325 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 152 flow. Second operand 3 states and 479 transitions. [2023-11-17 15:20:34,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 87 transitions, 341 flow [2023-11-17 15:20:34,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 337 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:34,335 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 188 flow [2023-11-17 15:20:34,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2023-11-17 15:20:34,335 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-11-17 15:20:34,335 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 188 flow [2023-11-17 15:20:34,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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 15:20:34,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:34,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:34,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:20:34,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:20:34,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1048684205, now seen corresponding path program 1 times [2023-11-17 15:20:34,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:34,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874035599] [2023-11-17 15:20:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:34,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:20:34,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:34,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874035599] [2023-11-17 15:20:34,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874035599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:34,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:34,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:34,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776250585] [2023-11-17 15:20:34,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:34,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:34,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:34,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:34,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 367 [2023-11-17 15:20:34,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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 15:20:34,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:34,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 367 [2023-11-17 15:20:34,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:39,654 INFO L124 PetriNetUnfolderBase]: 55557/75890 cut-off events. [2023-11-17 15:20:39,655 INFO L125 PetriNetUnfolderBase]: For 23415/24679 co-relation queries the response was YES. [2023-11-17 15:20:39,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175971 conditions, 75890 events. 55557/75890 cut-off events. For 23415/24679 co-relation queries the response was YES. Maximal size of possible extension queue 2593. Compared 513126 event pairs, 30790 based on Foata normal form. 2170/68792 useless extension candidates. Maximal degree in co-relation 109225. Up to 55442 conditions per place. [2023-11-17 15:20:40,190 INFO L140 encePairwiseOnDemand]: 364/367 looper letters, 64 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-17 15:20:40,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 409 flow [2023-11-17 15:20:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-11-17 15:20:40,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47229791099000906 [2023-11-17 15:20:40,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-11-17 15:20:40,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-11-17 15:20:40,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:40,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-11-17 15:20:40,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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 15:20:40,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:20:40,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:20:40,195 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 188 flow. Second operand 3 states and 520 transitions. [2023-11-17 15:20:40,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 409 flow [2023-11-17 15:20:40,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:20:40,298 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 192 flow [2023-11-17 15:20:40,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2023-11-17 15:20:40,299 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-11-17 15:20:40,299 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 192 flow [2023-11-17 15:20:40,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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 15:20:40,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:40,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:40,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:20:40,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:20:40,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2068327895, now seen corresponding path program 1 times [2023-11-17 15:20:40,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:40,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548213797] [2023-11-17 15:20:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:40,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:40,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:40,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548213797] [2023-11-17 15:20:40,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548213797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:40,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:40,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:40,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226053872] [2023-11-17 15:20:40,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:40,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:20:40,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:40,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:20:40,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:20:40,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 367 [2023-11-17 15:20:40,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 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 15:20:40,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:40,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 367 [2023-11-17 15:20:40,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:46,186 INFO L124 PetriNetUnfolderBase]: 67505/91342 cut-off events. [2023-11-17 15:20:46,186 INFO L125 PetriNetUnfolderBase]: For 38745/39131 co-relation queries the response was YES. [2023-11-17 15:20:46,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214615 conditions, 91342 events. 67505/91342 cut-off events. For 38745/39131 co-relation queries the response was YES. Maximal size of possible extension queue 2979. Compared 619376 event pairs, 43394 based on Foata normal form. 254/80247 useless extension candidates. Maximal degree in co-relation 100264. Up to 75181 conditions per place. [2023-11-17 15:20:46,788 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 56 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2023-11-17 15:20:46,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 406 flow [2023-11-17 15:20:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:20:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:20:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 598 transitions. [2023-11-17 15:20:46,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40735694822888285 [2023-11-17 15:20:46,790 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 598 transitions. [2023-11-17 15:20:46,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 598 transitions. [2023-11-17 15:20:46,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:46,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 598 transitions. [2023-11-17 15:20:46,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 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 15:20:46,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 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 15:20:46,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 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 15:20:46,793 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 192 flow. Second operand 4 states and 598 transitions. [2023-11-17 15:20:46,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 406 flow [2023-11-17 15:20:46,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:46,817 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 245 flow [2023-11-17 15:20:46,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2023-11-17 15:20:46,818 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-11-17 15:20:46,818 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 245 flow [2023-11-17 15:20:46,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 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 15:20:46,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:46,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:46,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:20:46,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:20:46,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:46,819 INFO L85 PathProgramCache]: Analyzing trace with hash 91966987, now seen corresponding path program 1 times [2023-11-17 15:20:46,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:46,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820847793] [2023-11-17 15:20:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:46,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:20:46,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:46,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820847793] [2023-11-17 15:20:46,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820847793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:46,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:46,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:46,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641302143] [2023-11-17 15:20:46,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:46,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:46,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:46,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:46,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 367 [2023-11-17 15:20:46,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 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 15:20:46,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:46,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 367 [2023-11-17 15:20:46,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:53,571 INFO L124 PetriNetUnfolderBase]: 74048/99982 cut-off events. [2023-11-17 15:20:53,571 INFO L125 PetriNetUnfolderBase]: For 74820/74948 co-relation queries the response was YES. [2023-11-17 15:20:53,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257132 conditions, 99982 events. 74048/99982 cut-off events. For 74820/74948 co-relation queries the response was YES. Maximal size of possible extension queue 3206. Compared 679956 event pairs, 47225 based on Foata normal form. 17/88224 useless extension candidates. Maximal degree in co-relation 136662. Up to 86372 conditions per place. [2023-11-17 15:20:54,282 INFO L140 encePairwiseOnDemand]: 360/367 looper letters, 65 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2023-11-17 15:20:54,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 102 transitions, 529 flow [2023-11-17 15:20:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-11-17 15:20:54,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43415077202543145 [2023-11-17 15:20:54,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-11-17 15:20:54,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-11-17 15:20:54,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:54,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-11-17 15:20:54,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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 15:20:54,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:20:54,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:20:54,290 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 245 flow. Second operand 3 states and 478 transitions. [2023-11-17 15:20:54,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 102 transitions, 529 flow [2023-11-17 15:20:54,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 511 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:54,353 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 339 flow [2023-11-17 15:20:54,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2023-11-17 15:20:54,354 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 8 predicate places. [2023-11-17 15:20:54,354 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 339 flow [2023-11-17 15:20:54,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 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 15:20:54,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:54,354 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:54,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:20:54,354 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:20:54,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:54,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1001273864, now seen corresponding path program 1 times [2023-11-17 15:20:54,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:54,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787053740] [2023-11-17 15:20:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:54,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:20:54,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:54,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787053740] [2023-11-17 15:20:54,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787053740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:54,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:54,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119401113] [2023-11-17 15:20:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:54,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:54,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:54,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 367 [2023-11-17 15:20:54,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 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 15:20:54,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:54,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 367 [2023-11-17 15:20:54,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:02,108 INFO L124 PetriNetUnfolderBase]: 80515/110800 cut-off events. [2023-11-17 15:21:02,108 INFO L125 PetriNetUnfolderBase]: For 148103/154649 co-relation queries the response was YES. [2023-11-17 15:21:02,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311171 conditions, 110800 events. 80515/110800 cut-off events. For 148103/154649 co-relation queries the response was YES. Maximal size of possible extension queue 3922. Compared 812239 event pairs, 41765 based on Foata normal form. 8340/103970 useless extension candidates. Maximal degree in co-relation 186867. Up to 76114 conditions per place. [2023-11-17 15:21:03,030 INFO L140 encePairwiseOnDemand]: 364/367 looper letters, 87 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-11-17 15:21:03,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 116 transitions, 703 flow [2023-11-17 15:21:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:21:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:21:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-11-17 15:21:03,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713896457765668 [2023-11-17 15:21:03,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-11-17 15:21:03,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-11-17 15:21:03,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:03,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-11-17 15:21:03,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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 15:21:03,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:21:03,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 15:21:03,034 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 339 flow. Second operand 3 states and 519 transitions. [2023-11-17 15:21:03,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 116 transitions, 703 flow [2023-11-17 15:21:03,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 116 transitions, 685 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:21:03,068 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 346 flow [2023-11-17 15:21:03,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2023-11-17 15:21:03,068 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-11-17 15:21:03,068 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 346 flow [2023-11-17 15:21:03,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 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 15:21:03,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:03,069 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:03,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 15:21:03,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:21:03,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:03,069 INFO L85 PathProgramCache]: Analyzing trace with hash -815550890, now seen corresponding path program 1 times [2023-11-17 15:21:03,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:03,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915541009] [2023-11-17 15:21:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:03,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:21:03,079 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:21:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:21:03,087 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:21:03,087 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:21:03,087 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:21:03,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:21:03,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:21:03,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:21:03,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:21:03,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:21:03,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 15:21:03,088 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:03,088 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:21:03,088 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:21:03,103 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:21:03,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:03,124 INFO L124 PetriNetUnfolderBase]: 27/302 cut-off events. [2023-11-17 15:21:03,125 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:21:03,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 302 events. 27/302 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 888 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-11-17 15:21:03,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:03,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:03,127 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:21:03,127 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:03,127 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:03,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:03,148 INFO L124 PetriNetUnfolderBase]: 27/302 cut-off events. [2023-11-17 15:21:03,148 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:21:03,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 302 events. 27/302 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 888 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-11-17 15:21:03,158 INFO L119 LiptonReduction]: Number of co-enabled transitions 29240 [2023-11-17 15:21:06,238 INFO L134 LiptonReduction]: Checked pairs total: 89370 [2023-11-17 15:21:06,239 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-11-17 15:21:06,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:21:06,257 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;@30cfbe1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:21:06,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:21:06,275 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:21:06,275 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-11-17 15:21:06,275 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:21:06,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:06,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:06,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:21:06,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:06,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1052336334, now seen corresponding path program 1 times [2023-11-17 15:21:06,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:06,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879183748] [2023-11-17 15:21:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:06,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:06,310 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 15:21:06,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:06,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879183748] [2023-11-17 15:21:06,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879183748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:21:06,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:21:06,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:21:06,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729030512] [2023-11-17 15:21:06,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:21:06,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:21:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:06,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:21:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:21:06,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 434 [2023-11-17 15:21:06,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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 15:21:06,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:06,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 434 [2023-11-17 15:21:06,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand